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Old 11-19-2020, 10:31 PM   #1
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Best Arrangement for Batteries & Inverter

So, I got four Valence U1-12RT U-Charge Lithium Batteries that I got cheap.
12.8V, 40 Ah, 512 Wh. Max Input 14.6V. I have a PowerMax 1000W Pure Sine Inverter. I made some 1 ft long 6 AWG cables. I had planned to mount the Batteries under the bed, and hang the Inverter on the cabinet wall next to them. The batteries are 5" x8".

I'm wondering what's the best way to place the batteries to get as many as possible to hook up with 1 ft cables in a 'star' configuration with each set of cables going from each battery to the inverter, or to some disconnect/ breaker/ etc.. Should I put them long side or short side toward the inverter? Some other arrangement? I'll probably sooner or later get more batteries. I have some heavier cables and a buss bar if I need it. I wonder if I can bolt the Buss bars
down alongside the batteries on each side and strap them down from there...

I planned on bolting a piece of 3/4" plywood, say 18" x 18" to the floor, and then strapping the batteries down to the plywood. Does Harbor Freight of some other place have good material for strapping the batteries down?

I'm kind of winging this initial setup. I imagine I'll modify it or upgrade it soon, but I'd like to have something for a holiday trip.

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Old 11-19-2020, 10:47 PM   #2
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Looks good.
https://www.wirebarn.com/Wire-Calculator-_ep_41.html
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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Old 11-19-2020, 10:56 PM   #3
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If you really intend to add more, I would just start with a buss bar. No sense in having to redo work later for something you already know is coming.
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Old 11-20-2020, 12:47 PM   #4
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Agree with bus bars, I started with 2 batteries and expanded to 6. When adding new batteries, just add equal length cables from batteries to busbar, that way equal resistance and load on each battery.
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Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
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Old 11-23-2020, 06:23 AM   #5
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Remember the more power that you produce ( battery and inverter), the more heat produced. If possible, it would be good to provide an air vent to the space under your bed.
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