Solar Panels: How many watts?
How many watts of solar panels would I need to keep two 12-volt batteries charged? I don’t know the specs on the batteries. I’m looking for a ballpark number. What about portable panels vs those mo...
Forum Discussion
Hi 2112,
Since the battery is rated at 100 amp-hours (yeah only 50% you can use) then 60 watts is the bare minimum to equalize. 150 watts hits the 85% acceptance level of 12.5 amps for 100 amp-hours. I.E. more than 150 watts is only going to get you to 85% a tiny bit faster.
The 60 watts is only going to able equalize when the RV is in storage.
I was invited write a series of articles at freecampsites.net
https://freecampsites.net/adding-solar/
Since the battery is rated at 100 amp-hours (yeah only 50% you can use) then 60 watts is the bare minimum to equalize. 150 watts hits the 85% acceptance level of 12.5 amps for 100 amp-hours. I.E. more than 150 watts is only going to get you to 85% a tiny bit faster.
The 60 watts is only going to able equalize when the RV is in storage.
I was invited write a series of articles at freecampsites.net
https://freecampsites.net/adding-solar/
2112 wrote:pianotuna wrote:Don
Some where between 60 and 150 watts per 100 amp-hours of storage.
Can you clarify this? I have a 100Ah battery but 50 usable Ah. Would I consider 50 or 100 as my "storage"?
The question of 'how much solar' comes up in my circle from time to time.
I agree with performing a realistic audit
Thanks
