Travis Watson
Member
- Joined
- Aug 6, 2017
- Messages
- 60
I'm still a few weeks out from starting my build, but I figured I'd go ahead and start up a thread since I took the first $ plunge today and bought my donor batteries, and I'm about to submit purchase for the trailer, as soon as we can agree on windows. This project is now officiallygreen-lit.
I am building a custom RV using an aluminum car hauler as a base unit. The goal is to be a fully off-grid self-sustained energy setup. Current plan is:
I am building a custom RV using an aluminum car hauler as a base unit. The goal is to be a fully off-grid self-sustained energy setup. Current plan is:
- Nine Panasonic N330 solar panels for 2,970 watts of solar wired in 3p3s to keep the wire runs efficient (see below for a rough initial layout mockup). 2s would have been ok (ish) too, but would have prevented me from having the 9th panel. 1s would require wire too large with losses too high imo, unless I mounted the charge controller in the ceiling, which I don't intend to do
- Battery pack configuration of 300p13s for a total of 3,900 cells. At 2.2Ah per cell, this looks like 31,746Wh nominal. These are new cells, purchased from alarmhookup on eBay:
View attachment 8
- The 13s configuration is due to the DC air conditioner requirements. It has a max voltage of 54v, which would be 4.15v per pack in a 13s configuration. If I were to do 14s, the air conditioner would not run at the higher charge states
- The least important draws shut off first: 44v for the air conditioner, 40v for the inverter, 35v for the 12v DC line for lights and so on. At 3v per cell that would be 39v, so the inverter and 12V DC should almost never shut off unless I hit low voltage protection