Marine battery build.

[bryanpbuss]

Friends and family have been extolling the virtues of Jackery systems on their sailboats and I wanted to try to do something different.
I wanted more capacity, more cycle life, faster charging, higher current and was willing to trade some portability for lower cost.
Here is what I made. Critiques welcome.

BoM:
4x EVE 280Ah
1x Superior 200A breaker
1x 200A Daly Smart BMS
1x 48x48x.5 PVC Board
2x Boxes 1.25" Stainless Steel Deck Screws
1x Package 3/8 Terminals
2' 2/0 Tinned Copper Welding Cable
8" 3/4 Type L Copper Pipe (for bus connection 90 degree to breaker)
4' 3/8 Nylon Double Braid Rope
4x Small Zip Ties
4" Velcro Strip (for attaching 12v "Cigarette Lighter" port and USB adapter)
1x 18"x6" 5/8 carpet pad
...about $900 total.
Capacity tested to 3500Wh for $0.26/Wh.

Slow charged individually to 3.5V, top balanced to 3.68V, put into series and cycled once before capacity testing.
Going into boat with Progressive Dynamics PD9160ALV Charger/Converter (Now 2 stage!) and Progressive Dynamics PD1620 Inverter (with integrated automatic pass-thru contactor).
Fits in almost the same footprint as a marine deep cycle. All components claim to be waterproof (skeptical but likely more durable than otherwise).

Comments welcome.
Please be kind, this is literally my first battery build.

Thanks Will Prowse for the videos and other resources that make this type of project a low risk and fun thing to try!

Thanks,
-Bryan

 

[Brandonlucky]

This looks awesome. Nicely done!!

 

[MasnPip]

Looks nice! I have to ask though, what’s the $50 for?

 

[Eastgip]

Wow, nice build, dude.