Add a battery and lithium iron phosphate house battery

[Sangster21]

I am doing some rewiring on my Sangster with mercruiser sterndrive. I bought the blue seas 7650 add a battery kit and have since decided to go with a 100ah lithium iron phosphate house battery. Can anyone wade in and offer advice on how to properly wire it all up? I have a Mercury kicker and an alternator on the main engine. I am pretty sure I need a dc to dc charger as well. Thanks, Alan

 

[goatman]

if you go to this guys youtube channel he has videos on how to mix different chemistry batteries and how to wire it to your alternator

 

[CBsqrd]

From my post last week: https://sportfishingbc.com/threads/...e-marine-boat-applications.95794/post-1198173



The +ve wires at the bottom left are coming from the two start batteries. The +ve wire leaving top left goes to the LiFePO4 house battery.

 

[Rain City]

From my post last week: https://sportfishingbc.com/threads/...e-marine-boat-applications.95794/post-1198173

View attachment 104449

The +ve wires at the bottom left are coming from the two start batteries. The +ve wire leaving top left goes to the LiFePO4 house battery.

Ooooh so you're running one of these from each engine. Smart. I currently only have one, this makes a lot of sense.

 

[zurk]

i wouldnt do it. add a battery kit is not designed for lithium and has tons of issues once you add lithium to the mix. been there done that.
mixing chemistries only leads to headaches. go all lithium. no reason not to.