Empathy List Archives

SW

S W

Fri, Feb 16, 2024 1:47 PM

Hi all,

Have you changed NT37 house bank 4*6V 220ah AGM batteries to lifepo4 batteries, what changes did you make to your system?

I have now ordered 2*260ah 12V lifepo4 batteries and DC-DC charger to save alternator + second AC-DC charger (only lifepo) and I was thinking about the future installation

I have the original Blue sea ARC 7600, I was wondering if it should be removed from the system when the system changes, so that the lifepo bank charges the starter batteries with a DC-DC charger.

ARC will then serve bow battery banks and starter batteries only?

I haven't seen any instruction on ARC switching when using a lifepo house bank.

Can you help me, pleace?

NT-37-205

EE

Evan Effa

Fri, Feb 16, 2024 2:58 PM

Hi,

This is not a small undertaking but very worthwhile IMO.

If you are going to consider making the switch to LFP you will need to do a lot of research. If you aren’t happy & comfortable with electrical wiring etc. it’s probably best to get a professional installer to design & install your system.

I would also argue that you would probably want more capacity but that’s your choice.

I recently reported on my experience on a Facebook group for Epoch Batteries (The Epoch’s are excellent BTW. ) I do not care for Facebook as a rule but appreciated some of the help I got there.

EPOCH BATTERIES DIY MARINE | Well, It's been a huge bit of work but I've completed my installation of the 2 x Epoch 460 Ah batteries to replace my 660 Ah Firefly batteries on my N... | Facebook

facebook.com

-evan. (AKA Harry Feefoo)

NT 37-148

TUGAWAY

Victoria,BC

Sent from my iPhone

(please excuse the typos...)

On Feb 16, 2024, at 05:48, S W via Sentoa <sentoa@lists.sentoa.org> wrote:

Hi all,

Have you changed NT37 house bank 4*6V 220ah AGM batteries to lifepo4 batteries, what changes did you make to your system?

I have now ordered 2*260ah 12V lifepo4 batteries and DC-DC charger to save alternator + second AC-DC charger (only lifepo) and I was thinking about the future installation

I have the original Blue sea ARC 7600, I was wondering if it should be removed from the system when the system changes, so that the lifepo bank charges the starter batteries with a DC-DC charger.

ARC will then serve bow battery banks and starter batteries only?

I haven't seen any instruction on ARC switching when using a lifepo house bank.

Can you help me, pleace?

NT-37-205

_______________________________________________
Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org

EE

Evan Effa

Fri, Feb 16, 2024 5:57 PM

Also, to be ABYC compliant and for safety’s sake, you really don’t want to allow any scenario where you can place the LFP house bank and the Lead Acid banks in parallel. The old ACR relay can be reused for other purposes but you don’t want to be able to inadvertently get the two different chemistries into an unrestricted parallel connection.

We have 2 separate ACR relays onboard. One has been reconfigured to join the Stern Thruster bank and the Start Bank. (Another joins the Generator start battery to the Start bank - not included in the attached schematic.)

The wiring revisions are extensive and need a lot of thought…

-Evan
NT 37-148
Tugaway
Victoria, BC

On Feb 16, 2024, at 05:47, S W via Sentoa sentoa@lists.sentoa.org wrote:

Hi all,

Have you changed NT37 house bank 4*6V 220ah AGM batteries to lifepo4 batteries, what changes did you make to your system?

I have now ordered 2*260ah 12V lifepo4 batteries and DC-DC charger to save alternator + second AC-DC charger (only lifepo) and I was thinking about the future installation

I have the original Blue sea ARC 7600, I was wondering if it should be removed from the system when the system changes, so that the lifepo bank charges the starter batteries with a DC-DC charger.

ARC will then serve bow battery banks and starter batteries only?

I haven't seen any instruction on ARC switching when using a lifepo house bank.

Can you help me, pleace?

NT-37-205

Sentoa mailing list -- sentoa@lists.sentoa.org
To unsubscribe send an email to sentoa-leave@lists.sentoa.org

Also, to be ABYC compliant and for safety’s sake, you really don’t want to allow any scenario where you can place the LFP house bank and the Lead Acid banks in parallel. The old ACR relay can be reused for other purposes but you don’t want to be able to inadvertently get the two different chemistries into an unrestricted parallel connection. We have 2 separate ACR relays onboard. One has been reconfigured to join the Stern Thruster bank and the Start Bank. (Another joins the Generator start battery to the Start bank - not included in the attached schematic.) The wiring revisions are extensive and need a lot of thought… -Evan NT 37-148 Tugaway Victoria, BC > On Feb 16, 2024, at 05:47, S W via Sentoa <sentoa@lists.sentoa.org> wrote: > > Hi all, > > Have you changed NT37 house bank 4*6V 220ah AGM batteries to lifepo4 batteries, what changes did you make to your system? > > > I have now ordered 2*260ah 12V lifepo4 batteries and DC-DC charger to save alternator + second AC-DC charger (only lifepo) and I was thinking about the future installation > > I have the original Blue sea ARC 7600, I was wondering if it should be removed from the system when the system changes, so that the lifepo bank charges the starter batteries with a DC-DC charger. > > ARC will then serve bow battery banks and starter batteries only? > > I haven't seen any instruction on ARC switching when using a lifepo house bank. > > Can you help me, pleace? > > NT-37-205 > > _______________________________________________ > Sentoa mailing list -- sentoa@lists.sentoa.org > To unsubscribe send an email to sentoa-leave@lists.sentoa.org

sentoa@lists.sentoa.org

Lifepo4 -NT37 house battery?