Bank of four 22ah Batteries Feedback?

[cboyd]

Here’s the plan I’m currently working through. I have an dual AGM up front that I’m going to leave and run a 100 Ahr Lifepo I’m the back. Battleborn or similar. all of this will be in the back in the underwings for the drawers.

i‘m not an EE, but I’m comfortable with DC power systems. Make sure you have someone competent check out your install. For reference / concept only.

 

[catastrofe]

Here’s the plan I’m currently working through. I have an dual AGM up front that I’m going to leave and run a 100 Ahr Lifepo I’m the back. Battleborn or similar. all of this will be in the back in the underwings for the drawers.

i‘m not an EE, but I’m comfortable with DC power systems. Make sure you have someone competent check out your install. For reference / concept only.

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Depending on which drawer system you have, you won't be able to fit an off-the-shelf battery (Battleborn, etc.) in the side wings. I have ARB drawers in my 2019, and the width available between the drawer and the vehicle side panels is about 7" max. Compounding the space issue is the curvature of the side panels, the supports for the drawers, wheel well, etc., so you don't have that 7" for any substantial length dimension.

I've been going back and forth between mounting my aux battery in the rear, or up front in the engine bay (Slee Aux Battery Tray). I'd love to place a LiFePo4 battery in the rear, but the only way practical solution is to mount it on top of the side wings. The BCDC and fuses could probably be mounted to a panel and placed under a side wing.

 

[cboyd]

Good point on this being drawer-specific, though there is another thread here on mud 200 section which shows a ReLion Rb100 battery mounted in the wing of a Trexxbox and I believe it's about the same dimension as the battleborn. (in fact a bit taller than mentioned above at 8.8 in height. This makes chaining smaller batteries together a better solution, but potentially more complex from a wiring perspective.

Nice thing about the battleborn (and at from least the data sheet of the ReLion), that they have low-temp sensors and disconnect logic for temperature, so even if the BCDC or another charger doesn't compensate for temperature -the battery will. this is important to ensure, especially on the cost of these batteries! If you do a DIY battery, you'll have to ensure the BMS does have this function, and according to the DIY solar forum reference above (and will prowse videos on YT - who runs that forum IIRC) there are only a couple that *actually* function despite being advertised to do it.

 

[Bunga]

The BMS and 1C of Battleborn are a winner for me. Watch out for the mystery cells, could be great, and if you are handy awesome; but if you aren't, could be watching a really cool fire. Small ah cells are a pain, as said above. Get big and compatible.