slightly different solar qx
Am looking at solar on a small class A. I currently have 3 group 27 batteries (rv/marine) for the house. (prior owners had just installed 2 new, and I had one from a trolling motor setup) they will...
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wanderingaimlessly wrote:Yes you got it!
The gain or loss due to voltage difference is my question.
Or is this a case of 300 watts is 300 watts,,voltage be damned?,,
A 300W panel delivers 300W of power regardless of battery voltage. A 48V battery would get 1/4 the amps of a 12V battery but both get 300W of power.
For a 12V battery bank or a 48V battery bank each RV would have the same about of usable power.
Try this: For the 48V battery a 48V 48W light bulb will draw 1A. For the same amount of light on a 12V battery a 12V bulb would draw 4A. ie 48V*1A = 48W = 12V*4A
