Hi,
I am in the process of installing my vent for my batteries. I have 2 banks of 4 12vdc batteries (US Battery 185HCXC) Each
battery will be connected in series(4) with No. 2 awg copper and the 2 banks will terminate at the end of the box at 2
400 amp rated vacuum switches so that I can isolate each bank(positive side). At the switch I will have a short 8 inch 2 awg
wire that will tie the 2 banks together and the 4/0 copper cabling routed to E-panel about 4 ft in length. My box is wooden
made out of 3/4" plywood and has 1 inch house siding foam on the inside for temperature changes. I also used rubber shower
lining to protect the bottom of box and sides up to 18" above grade. The Box is 72"L X 24"H X 22"W. At the far end I have cut
in a hole for 2" PVC pipe which rises up about a foot and using a 2" LB exists the wall to outside atmosphere At the end of the
2" PVC I have a plumbing PVC 90 that turns down to prevent rain from entering! I purchased a 48 volt fan that moves about
58 cubic ft of air/ minute. The fan will be mounted inside the box at the far end from the vent about 8 inches from bottom of
box. it will be recessed in the foam insulation and I will probably hold it in place with duct tape for now. A 3" hole will be cut
through box (plywood) for fan to pull air into box. I am not sure what is best way to wire it in - don't want a 24/7 run, but
would prefer it to come on when bank is being charged or discharged! Not sure where to tie it in - have (3) Midnite Classic
150s and (2) XW6048. My setup will be Grid-tie with battery backup. Most of the time I will just float the batteries and sell
back when panels are charging. But for power outages I kill house main and grid sell and switch to Off grid for periods
of time!
Any suggestions are appreciated - especially on batteries! Goal is to eventually install larger battery bank that won't
need venting. All solar equipment is in shop with other sensitive electronics present also (ham radio)
Thanks,
Bill
I am in the process of installing my vent for my batteries. I have 2 banks of 4 12vdc batteries (US Battery 185HCXC) Each
battery will be connected in series(4) with No. 2 awg copper and the 2 banks will terminate at the end of the box at 2
400 amp rated vacuum switches so that I can isolate each bank(positive side). At the switch I will have a short 8 inch 2 awg
wire that will tie the 2 banks together and the 4/0 copper cabling routed to E-panel about 4 ft in length. My box is wooden
made out of 3/4" plywood and has 1 inch house siding foam on the inside for temperature changes. I also used rubber shower
lining to protect the bottom of box and sides up to 18" above grade. The Box is 72"L X 24"H X 22"W. At the far end I have cut
in a hole for 2" PVC pipe which rises up about a foot and using a 2" LB exists the wall to outside atmosphere At the end of the
2" PVC I have a plumbing PVC 90 that turns down to prevent rain from entering! I purchased a 48 volt fan that moves about
58 cubic ft of air/ minute. The fan will be mounted inside the box at the far end from the vent about 8 inches from bottom of
box. it will be recessed in the foam insulation and I will probably hold it in place with duct tape for now. A 3" hole will be cut
through box (plywood) for fan to pull air into box. I am not sure what is best way to wire it in - don't want a 24/7 run, but
would prefer it to come on when bank is being charged or discharged! Not sure where to tie it in - have (3) Midnite Classic
150s and (2) XW6048. My setup will be Grid-tie with battery backup. Most of the time I will just float the batteries and sell
back when panels are charging. But for power outages I kill house main and grid sell and switch to Off grid for periods
of time!
Any suggestions are appreciated - especially on batteries! Goal is to eventually install larger battery bank that won't
need venting. All solar equipment is in shop with other sensitive electronics present also (ham radio)
Thanks,
Bill
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