24V battery bank with solar - pros and cons
Hmmm.... should I go with a 24V Battery bank? I am in the planning phase of a 800 to 1,000 Watt solar system for my 5th wheel. I am thinking maybe a Morningstar TS-MPPT-60 charge controller and 4 ...
Forum Discussion
BFL13 wrote:
You don't double the power. 8 amps on a 24v batt is the same as 16 amps on a 12v batt. Same charging time on same batteries whether wired as 24 or 12.
However the controller is more efficient without having to buck the voltage down to 12v. So you do get a little better that way but not a lot. Fairly trivial in fact.
You might look at these results for 24-12 and 24-24 before going to a lot of trouble
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28400759.cfm
Nice data - thanks. Now you got me thinking of possibly doing PWM to a 24V battery bank.
Do you remember seeing any data on how PWM does vs. MPPT with shading involved? I remember seeing a real long thread some years ago on this forum about shading and the big lesson I remembered from it was of needing bypass diodes to minimize the impact of partial shading.
