Using a residential PV panel on RV
Hi everyone, Newly registered to the forum here, I've been reading a lot of helpful information here over the past year while doing my conversion though. I haven't been able to find a straight ans...
Forum Discussion
joelmyer wrote:westend wrote:
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FWIW, I built a system for my off-grid rig that has one 24V module, an MPPT controller, and I have 300 AH in two banks. I'm real happy with the performance of all of it.
Details please. Which controller?
I'm planning something similar. We winter 2-3 months in Key West.
I measured Feb 2014:
1-1.5 hours generator time to < 10 amps into 236 ah bank.
30 ah usage from generator off to tv time
3 hours generator/TV time, estimated 36 ah
overnight 30 ah
One 24 volt panel ~250watts versus two 12v panels.
One thing to mount on roof.
Less Amps coming down
More expensive controller.
Offtopic, but since you asked...
In the range 300-480W MPPT I wouldn't look any further than Rogue 3048. Simply the best, in terms of features for $. Good quality. With 250W panel this will also leave room for expansion.
About "one thing to mount" - anybody who did it, will tell you that after you've brought yourself to drilling the 1st hole in the roof, the rest 20 or 30 holes are easy, and then it doesn't matter how many :)...
Don't know why "less amps coming down". Amps at the controller output depend on panel wattage. You will likely get the same amps from 250W 24V panel as from 2*130W 12V panels, though less than from 2*150W 12V panels.
I'm a little confused about your consumption numbers, but it looks like you have 15+30+36+30=111 AH. On a good day a 400W array will collect that much, if not more. Makes a lot of sense getting 400-450W. 2*24V panels.
