Re: Sentoa Digest, Vol 182, Issue 15
I just wanted to jump in here and say that needing a new inverter/charger
is not always the case. I upgraded to lifepo4 and kept my 20yo outback.
Been running great for 3 years now. Like everyone else says lifepo4 is an
awesome upgrade!
On Fri, Aug 28, 2026 at 7:49 AM sentoa-request@lists.sentoa.org wrote:
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Today's Topics:
1. Re: lifepo4 install nt32 (Robert Libbert)
2. Re: lifepo4 install nt32 (Eric Swanson)
Message: 1
Date: Fri, 28 Aug 2026 14:07:07 +0000
From: Robert Libbert Rob@libbert.us
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
sentoa@lists.sentoa.org
Message-ID: <IA6PR16MB9045836FF70B7E49153BD0B7E2CBAC2@IA6PR16MB904583
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Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as
budget allows. So far I’ve added two 200W panels to the pilothouse roof, a
Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really
extends the life of my AGM battery setup. I too was hoping to drop in some
lithium marine batteries that have their own BMS and call it good, but the
more research I do, the more I realized I really needed a LiFePO4 capable
charger/inverter to go with them. Since thats not in the budget right now,
I’m sticking with the AGM/Solar combo which has been great for the long
summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa sentoa@lists.sentoa.org
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <
sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON james.brunson@cox.net
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26
with 500 watts of solar. No issues with heat. System stays up with two
refrigerators and normal other 12v accessories. Using Victron controllers
which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <
sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences
installing a lifepo4 house bank in a NT32. I find my current 2 6v gc
batteries inadequate, with 20 hours about best expectation at anchor. I
only run the genset for a/c and charging, have propane cooking and primary
load is refrigeration and electronics etc, so would like to improve
capacity.
The easy way to go lifepo4 would be in the current location in aft
starboard engine room. I worry heat would be an issue and wonder how/where
others have done the conversion. Can a blower help or should I relocate,
perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch
314 ah (or 2). Hardware costs are becoming close, and would simplify and
enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.org<mailto:
sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.org<mailto:
sentoa-leave@lists.sentoa.org>
I’m planning to replace 6 Lifeline 6 volt agm batteries (660 ah total) with 2 Epoch V1 460 ah 12 volt LiFePo4 connected in parallel for a 920 ah house bank. I plan to use a Victron 50 A DC to DC charger and solar panels (390 W on the cabin top and 400 W portable on the upper deck) to charge the bank.
One concern I have is locating the Epoch batteries in the engine room. The specs on the Epoch 460 ah batteries show a discharge temperature range of -4° F to 131° F and a charge temperature range of -22° F to 131° F. I placed a temperature sensor in the engine near the existing battery bank and saw a maximum temperature of 130.1° F with the engine running for approximately 3 hours. I expect the engine room temperature may go higher if the engine is running for longer. I used a SensorPush device to track the temperature and I believe it’s reasonably accurate.
In any event, the battery swap is a project for this winter or next spring so I have some time to explore alternative locations or a way to reduce the temperature in the engine room.
Best regards,
Tony Torphy
Snorri 2002 NT32
Sent from my iPhone
On Aug 28, 2026, at 2:48 PM, Louis Gordon via Sentoa <sentoa@lists.sentoa.org> wrote:
I just wanted to jump in here and say that needing a new inverter/charger is not always the case. I upgraded to lifepo4 and kept my 20yo outback. Been running great for 3 years now. Like everyone else says lifepo4 is an awesome upgrade!
On Fri, Aug 28, 2026 at 7:49 AM <sentoa-request@lists.sentoa.org> wrote:
Send Sentoa mailing list submissions to
sentoa@lists.sentoa.orgTo subscribe or unsubscribe via email, send a message with subject or
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sentoa-owner@lists.sentoa.orgWhen replying, please edit your Subject line so it is more specific
than "Re: Contents of Sentoa digest..."Today's Topics:
- Re: lifepo4 install nt32 (Robert Libbert)
- Re: lifepo4 install nt32 (Eric Swanson)
Message: 1
Date: Fri, 28 Aug 2026 14:07:07 +0000
From: Robert Libbert <Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.org>
Message-ID: <IA6PR16MB9045836FF70B7E49153BD0B7E2CBAC2@IA6PR16MB904583
.namprd16.prod.outlook.com>
Content-Type: multipart/alternative; boundary="_000_IA6PR16MB904583
6FF70B7E49153BD0B7E2CBAC2IA6PR16MB904583_"Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
JimOn Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
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Date: Fri, 28 Aug 2026 14:49:05 +0000
From: Eric Swanson <eswanson23@hotmail.com>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.us>
Message-ID: <MN2PR15MB36798C2942288B88935B4BE9D2AC2@MN2PR15MB3679.nam
prd15.prod.outlook.com>
Content-Type: multipart/alternative; boundary="_000_MN2PR15MB36798C
2942288B88935B4BE9D2AC2MN2PR15MB3679namp_"Thanks for the great responses which reinforce my best path desire and my competent local shop advice.
Proposed install would be 1 epoch eco series 314ah (or 2) charged by Orion xs12/12 -50aDC-DC charger (adjusted to 40amps) from start battery, with Victron bmv712 monitor.
Labor being the biggest expense, the local shop seems quite receptive to letting me do portions of the work I am comfortable doing (mostly the grunt work) while they provide balance. Seems good way forward.
Thanks again, always good to get feedback from others who have been or going to be in the same "boat".
Eric________________________________
From: Robert Libbert via Sentoa <sentoa@lists.sentoa.org>
Sent: Friday, August 28, 2026 10:07 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
JimOn Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
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End of Sentoa Digest, Vol 182, Issue 15
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I plan to run the boat this weekend with temp sensors, but believe your figures will be in the ballpark from infrared sensor readings I have done. With the existing batteries under the exhaust system is not ideal, but being under the intakes might leave a blower as a possible option. The right batteries could fit under the L settee, but make the install more difficult. Both options have been successfully done by NT owners replying to this thread so I will dig a little deeper before jumping.
The several comments about careful planning and capable installers is advise I will take seriously. Given that, having boat specific advise is invaluable to me and I thank everyone who responded.
Eric
From: Anthony Torphy via Sentoa sentoa@lists.sentoa.org
Sent: Friday, August 28, 2026 4:06 PM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: Louis Gordon lpgordon@gmail.com; sentoa@lists.sentoa.org sentoa@lists.sentoa.org; Anthony Torphy atorphy@gmail.com
Subject: [Sentoa] Re: Sentoa Digest, Vol 182, Issue 15
I’m planning to replace 6 Lifeline 6 volt agm batteries (660 ah total) with 2 Epoch V1 460 ah 12 volt LiFePo4 connected in parallel for a 920 ah house bank. I plan to use a Victron 50 A DC to DC charger and solar panels (390 W on the cabin top and 400 W portable on the upper deck) to charge the bank.
One concern I have is locating the Epoch batteries in the engine room. The specs on the Epoch 460 ah batteries show a discharge temperature range of -4° F to 131° F and a charge temperature range of -22° F to 131° F. I placed a temperature sensor in the engine near the existing battery bank and saw a maximum temperature of 130.1° F with the engine running for approximately 3 hours. I expect the engine room temperature may go higher if the engine is running for longer. I used a SensorPush device to track the temperature and I believe it’s reasonably accurate.
In any event, the battery swap is a project for this winter or next spring so I have some time to explore alternative locations or a way to reduce the temperature in the engine room.
Best regards,
Tony Torphy
Snorri 2002 NT32
Sent from my iPhone
On Aug 28, 2026, at 2:48 PM, Louis Gordon via Sentoa sentoa@lists.sentoa.org wrote:
I just wanted to jump in here and say that needing a new inverter/charger is not always the case. I upgraded to lifepo4 and kept my 20yo outback. Been running great for 3 years now. Like everyone else says lifepo4 is an awesome upgrade!
On Fri, Aug 28, 2026 at 7:49 AM <sentoa-request@lists.sentoa.orgmailto:sentoa-request@lists.sentoa.org> wrote:
Send Sentoa mailing list submissions to
sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org
To subscribe or unsubscribe via email, send a message with subject or
body 'help' to
sentoa-request@lists.sentoa.orgmailto:sentoa-request@lists.sentoa.org
You can reach the person managing the list at
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Sentoa digest..."
Today's Topics:
- Re: lifepo4 install nt32 (Robert Libbert)
- Re: lifepo4 install nt32 (Eric Swanson)
Message: 1
Date: Fri, 28 Aug 2026 14:07:07 +0000
From: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Message-ID: <IA6PR16MB9045836FF70B7E49153BD0B7E2CBAC2@IA6PR16MB904583
.namprd16.prod.outlook.comhttp://namprd16.prod.outlook.com>
Content-Type: multipart/alternative; boundary="000_IA6PR16MB904583
6FF70B7E49153BD0B7E2CBAC2IA6PR16MB904583"
Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org<mailto:sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org>
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Message: 2
Date: Fri, 28 Aug 2026 14:49:05 +0000
From: Eric Swanson <eswanson23@hotmail.commailto:eswanson23@hotmail.com>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Message-ID: <MN2PR15MB36798C2942288B88935B4BE9D2AC2@MN2PR15MB3679.nam
prd15.prod.outlook.comhttp://prd15.prod.outlook.com>
Content-Type: multipart/alternative; boundary="000_MN2PR15MB36798C
2942288B88935B4BE9D2AC2MN2PR15MB3679namp"
Thanks for the great responses which reinforce my best path desire and my competent local shop advice.
Proposed install would be 1 epoch eco series 314ah (or 2) charged by Orion xs12/12 -50aDC-DC charger (adjusted to 40amps) from start battery, with Victron bmv712 monitor.
Labor being the biggest expense, the local shop seems quite receptive to letting me do portions of the work I am comfortable doing (mostly the grunt work) while they provide balance. Seems good way forward.
Thanks again, always good to get feedback from others who have been or going to be in the same "boat".
Eric
From: Robert Libbert via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Sent: Friday, August 28, 2026 10:07 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org<mailto:sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org>
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You should keep in mind that those temperature specs are not hard “threshold” numbers. Most chemical and degradation processes increase rapidly with temperature, even well below the specified maximum.
For best performance and lifetime is it usually a good idea to stay well away from the “limits”.
Gene Fuller
Yorkshire Rose
NT 37136
Punta Gorda, FL
I agree, and plan to monitor heat closely next time out as long cruises will depend on engine charging, heat will be a constant factor, and needs attention. Best reason to look to boat specific feedback, thanks!
From: Gene Fuller via Sentoa sentoa@lists.sentoa.org
Sent: Friday, August 28, 2026 7:27 PM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: gefuller5@comcast.net gefuller5@comcast.net
Subject: [Sentoa] Re: Sentoa Digest, Vol 182, Issue 15
You should keep in mind that those temperature specs are not hard “threshold” numbers. Most chemical and degradation processes increase rapidly with temperature, even well below the specified maximum.
For best performance and lifetime is it usually a good idea to stay well away from the “limits”.
Gene Fuller
Yorkshire Rose
NT 37136
Punta Gorda, FL
A little update, I ran the boat south from Oriental today with an east wind 8-10kn for 1 hour, air temp was 89*. With a sensor next to the battery and another 2' forward under the engine room Vent (starboard side). The temperature next to the battery went to 110* and held fairly steady. The sensor under the vent went to 99*. I then turned 180 for the return trip. Temps immediately dropped and both sensors stayed within 2 degrees of ambient temps after 15 minutes.
My take on this is the wind coming through the port hull vent was heated by the engine, and turning 180 had the opposite, cooling effect.
I believe a small blower, perhaps even ducted from the intake to and vented through a battery enclosure would be adequate to maintain temps for the lifepo4.
Eric
From: Anthony Torphy via Sentoa sentoa@lists.sentoa.org
Sent: Friday, August 28, 2026 4:06 PM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: Louis Gordon lpgordon@gmail.com; sentoa@lists.sentoa.org sentoa@lists.sentoa.org; Anthony Torphy atorphy@gmail.com
Subject: [Sentoa] Re: Sentoa Digest, Vol 182, Issue 15
I’m planning to replace 6 Lifeline 6 volt agm batteries (660 ah total) with 2 Epoch V1 460 ah 12 volt LiFePo4 connected in parallel for a 920 ah house bank. I plan to use a Victron 50 A DC to DC charger and solar panels (390 W on the cabin top and 400 W portable on the upper deck) to charge the bank.
One concern I have is locating the Epoch batteries in the engine room. The specs on the Epoch 460 ah batteries show a discharge temperature range of -4° F to 131° F and a charge temperature range of -22° F to 131° F. I placed a temperature sensor in the engine near the existing battery bank and saw a maximum temperature of 130.1° F with the engine running for approximately 3 hours. I expect the engine room temperature may go higher if the engine is running for longer. I used a SensorPush device to track the temperature and I believe it’s reasonably accurate.
In any event, the battery swap is a project for this winter or next spring so I have some time to explore alternative locations or a way to reduce the temperature in the engine room.
Best regards,
Tony Torphy
Snorri 2002 NT32
Sent from my iPhone
On Aug 28, 2026, at 2:48 PM, Louis Gordon via Sentoa sentoa@lists.sentoa.org wrote:
I just wanted to jump in here and say that needing a new inverter/charger is not always the case. I upgraded to lifepo4 and kept my 20yo outback. Been running great for 3 years now. Like everyone else says lifepo4 is an awesome upgrade!
On Fri, Aug 28, 2026 at 7:49 AM <sentoa-request@lists.sentoa.orgmailto:sentoa-request@lists.sentoa.org> wrote:
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Today's Topics:
- Re: lifepo4 install nt32 (Robert Libbert)
- Re: lifepo4 install nt32 (Eric Swanson)
Message: 1
Date: Fri, 28 Aug 2026 14:07:07 +0000
From: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Message-ID: <IA6PR16MB9045836FF70B7E49153BD0B7E2CBAC2@IA6PR16MB904583
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Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
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Date: Fri, 28 Aug 2026 14:49:05 +0000
From: Eric Swanson <eswanson23@hotmail.commailto:eswanson23@hotmail.com>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Message-ID: <MN2PR15MB36798C2942288B88935B4BE9D2AC2@MN2PR15MB3679.nam
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2942288B88935B4BE9D2AC2MN2PR15MB3679namp"
Thanks for the great responses which reinforce my best path desire and my competent local shop advice.
Proposed install would be 1 epoch eco series 314ah (or 2) charged by Orion xs12/12 -50aDC-DC charger (adjusted to 40amps) from start battery, with Victron bmv712 monitor.
Labor being the biggest expense, the local shop seems quite receptive to letting me do portions of the work I am comfortable doing (mostly the grunt work) while they provide balance. Seems good way forward.
Thanks again, always good to get feedback from others who have been or going to be in the same "boat".
Eric
From: Robert Libbert via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Sent: Friday, August 28, 2026 10:07 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
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End of Sentoa Digest, Vol 182, Issue 15
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Where are you at in Oriental? We’re at Sea Harbor…
From: Eric Swanson via Sentoa sentoa@lists.sentoa.org
Sent: Sunday, 30 August 2026 17:21:18
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: Louis Gordon lpgordon@gmail.com; Anthony Torphy atorphy@gmail.com; Eric Swanson eswanson23@hotmail.com
Subject: [Sentoa] Re: Sentoa Digest, Vol 182, Issue 15
A little update, I ran the boat south from Oriental today with an east wind 8-10kn for 1 hour, air temp was 89*. With a sensor next to the battery and another 2' forward under the engine room Vent (starboard side). The temperature next to the battery went to 110* and held fairly steady. The sensor under the vent went to 99*. I then turned 180 for the return trip. Temps immediately dropped and both sensors stayed within 2 degrees of ambient temps after 15 minutes.
My take on this is the wind coming through the port hull vent was heated by the engine, and turning 180 had the opposite, cooling effect.
I believe a small blower, perhaps even ducted from the intake to and vented through a battery enclosure would be adequate to maintain temps for the lifepo4.
Eric
From: Anthony Torphy via Sentoa sentoa@lists.sentoa.org
Sent: Friday, August 28, 2026 4:06 PM
To: sentoa@lists.sentoa.org sentoa@lists.sentoa.org
Cc: Louis Gordon lpgordon@gmail.com; sentoa@lists.sentoa.org sentoa@lists.sentoa.org; Anthony Torphy atorphy@gmail.com
Subject: [Sentoa] Re: Sentoa Digest, Vol 182, Issue 15
I’m planning to replace 6 Lifeline 6 volt agm batteries (660 ah total) with 2 Epoch V1 460 ah 12 volt LiFePo4 connected in parallel for a 920 ah house bank. I plan to use a Victron 50 A DC to DC charger and solar panels (390 W on the cabin top and 400 W portable on the upper deck) to charge the bank.
One concern I have is locating the Epoch batteries in the engine room. The specs on the Epoch 460 ah batteries show a discharge temperature range of -4° F to 131° F and a charge temperature range of -22° F to 131° F. I placed a temperature sensor in the engine near the existing battery bank and saw a maximum temperature of 130.1° F with the engine running for approximately 3 hours. I expect the engine room temperature may go higher if the engine is running for longer. I used a SensorPush device to track the temperature and I believe it’s reasonably accurate.
In any event, the battery swap is a project for this winter or next spring so I have some time to explore alternative locations or a way to reduce the temperature in the engine room.
Best regards,
Tony Torphy
Snorri 2002 NT32
Sent from my iPhone
On Aug 28, 2026, at 2:48 PM, Louis Gordon via Sentoa sentoa@lists.sentoa.org wrote:
I just wanted to jump in here and say that needing a new inverter/charger is not always the case. I upgraded to lifepo4 and kept my 20yo outback. Been running great for 3 years now. Like everyone else says lifepo4 is an awesome upgrade!
On Fri, Aug 28, 2026 at 7:49 AM <sentoa-request@lists.sentoa.orgmailto:sentoa-request@lists.sentoa.org> wrote:
Send Sentoa mailing list submissions to
sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org
To subscribe or unsubscribe via email, send a message with subject or
body 'help' to
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When replying, please edit your Subject line so it is more specific
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Today's Topics:
- Re: lifepo4 install nt32 (Robert Libbert)
- Re: lifepo4 install nt32 (Eric Swanson)
Message: 1
Date: Fri, 28 Aug 2026 14:07:07 +0000
From: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Message-ID: <IA6PR16MB9045836FF70B7E49153BD0B7E2CBAC2@IA6PR16MB904583
.namprd16.prod.outlook.comhttp://namprd16.prod.outlook.com>
Content-Type: multipart/alternative; boundary="000_IA6PR16MB904583
6FF70B7E49153BD0B7E2CBAC2IA6PR16MB904583"
Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org<mailto:sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org>
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Message: 2
Date: Fri, 28 Aug 2026 14:49:05 +0000
From: Eric Swanson <eswanson23@hotmail.commailto:eswanson23@hotmail.com>
Subject: [Sentoa] Re: lifepo4 install nt32
To: "South East Nordic Tugs Owners' Association (SENTOA)"
<sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Message-ID: <MN2PR15MB36798C2942288B88935B4BE9D2AC2@MN2PR15MB3679.nam
prd15.prod.outlook.comhttp://prd15.prod.outlook.com>
Content-Type: multipart/alternative; boundary="000_MN2PR15MB36798C
2942288B88935B4BE9D2AC2MN2PR15MB3679namp"
Thanks for the great responses which reinforce my best path desire and my competent local shop advice.
Proposed install would be 1 epoch eco series 314ah (or 2) charged by Orion xs12/12 -50aDC-DC charger (adjusted to 40amps) from start battery, with Victron bmv712 monitor.
Labor being the biggest expense, the local shop seems quite receptive to letting me do portions of the work I am comfortable doing (mostly the grunt work) while they provide balance. Seems good way forward.
Thanks again, always good to get feedback from others who have been or going to be in the same "boat".
Eric
From: Robert Libbert via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Sent: Friday, August 28, 2026 10:07 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: Robert Libbert <Rob@libbert.usmailto:Rob@libbert.us>
Subject: [Sentoa] Re: lifepo4 install nt32
Hi Eric - I’m in NC as well and in the middle of a similar upgrade path as budget allows. So far I’ve added two 200W panels to the pilothouse roof, a Victron MPPT controller, a Cerbo GX and a smartshunt. The solar really extends the life of my AGM battery setup. I too was hoping to drop in some lithium marine batteries that have their own BMS and call it good, but the more research I do, the more I realized I really needed a LiFePO4 capable charger/inverter to go with them. Since thats not in the budget right now, I’m sticking with the AGM/Solar combo which has been great for the long summer days. Not sure how well it will keep up this winter.
Rob
From: JAMES BRUNSON via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Date: Friday, August 28, 2026 at 9:57 AM
To: South East Nordic Tugs Owners' Association (SENTOA) <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
Cc: JAMES BRUNSON <james.brunson@cox.netmailto:james.brunson@cox.net>
Subject: [Sentoa] Re: lifepo4 install nt32
I have 4/100amp lithium installed in the engine compartment on my NT 26 with 500 watts of solar. No issues with heat. System stays up with two refrigerators and normal other 12v accessories. Using Victron controllers which are the best.
Regards ,
Jim
On Friday, August 28, 2026, 09:13, Eric Swanson via Sentoa <sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org> wrote:
I have not found any info from archives or elsewhere with experiences installing a lifepo4 house bank in a NT32. I find my current 2 6v gc batteries inadequate, with 20 hours about best expectation at anchor. I only run the genset for a/c and charging, have propane cooking and primary load is refrigeration and electronics etc, so would like to improve capacity.
The easy way to go lifepo4 would be in the current location in aft starboard engine room. I worry heat would be an issue and wonder how/where others have done the conversion. Can a blower help or should I relocate, perhaps in the starboard locker beneath the settee? Or simply go with 4 gc?
Local electronics shop seems to think the ER would work proposing Epoch 314 ah (or 2). Hardware costs are becoming close, and would simplify and enhance future solar, inverter etc installs and way less battery anxiety.
What to do?
Eric Swanson
NT 32-258
Gone Remote
NC
Sentoa mailing list -- sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org<mailto:sentoa@lists.sentoa.orgmailto:sentoa@lists.sentoa.org>
To unsubscribe send an email to sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org<mailto:sentoa-leave@lists.sentoa.orgmailto:sentoa-leave@lists.sentoa.org>
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