What size solar charger to maintain batteries
What size solar charger should I get to maintain coach batteries. How many watts do I need.
Forum Discussion
Hi,
Panels run below $2 per watt in cost. Sounds like someone is doing a pretty high "mark up". Here is one that is a lot cheaper! 12 volt panel
To use a 36 volt system you would need to change to an MPPT controller.
2 240 watt panels is not going to get you to 45 amps. It may get you to a little over 30 amps. Or were you planning to have the old system working in tandem with the new?
Panels run below $2 per watt in cost. Sounds like someone is doing a pretty high "mark up". Here is one that is a lot cheaper! 12 volt panel
To use a 36 volt system you would need to change to an MPPT controller.
2 240 watt panels is not going to get you to 45 amps. It may get you to a little over 30 amps. Or were you planning to have the old system working in tandem with the new?
RFCN2 wrote:
I am about ready to add to my current 2 12volt panel system that has 260 watts and about 16.5 amps max. I can add one 12 volt panel to my existing system for 500 bucks for the panel. Then my 30 amp controller is maxed out.
The guys that put up my solar system 1 1/2 years ago tell me I should go with the new 36 volt systems. The new 240 watt panels are $360 each without install. Does anyone know anything about 36 volt systems vs 12 volt systems? I would have to get another controller, but I figure I can add 2 of the 240 watt 16 amp panels and have 45 amps max output. That should cover all my electric needs except air conditioning. Although I currently have a 2000 watt inverter that should power one air conditioner.
