Puzzeling thru a 12v to 24v solar upgrade
Currently have 400w of 12v panels feeding four 6v US Battery 2200's in series/parallel.The 12V battery output goes to a 1000w inverter dedicated to a single plug output for computers. There is a Blue ...
Forum Discussion
glennts wrote:
@2oldman: "I'm not sure why you'd want to buy an controller that won't deliver all the power you're giving it."
I'm putting 975w into a controller that is rated for 1040w.... seems to me at 40a in and 40a out it's going to deliver all the power I'm giving it... or am I missing something?
Rated output power is 40 amps x 13v (battery volts) = 520W
The controller can still do 40 amps with a 24v battery bank, so now 40a x 26v = 1040w.
Input watts at 95% efficiency to do that 520w would be 547w. So you are "over-paneled" by about 400w. (the 975 is really 878w after the usual 10% for heat loss)
Morningstar likes a bit of over-paneling to get more daily AH haul by getting more during the shoulder hours. But not that much!
You could use a higher amp rated controller if you have the daily AH need, or else just use two of those 325W panels.
Now you are going to ask about 24v battery again. You don't get any more you can use if you have two batts as 12 or 24. Your daily usage is whatever, so if the two batts can do that much, you are good. You don't get twice as much out of them when they are at 24.
See my earlier post asking what your plan is and some choices you have.
