To help guide this it helps to answer a couple of questions....Need help what is the max number of solar panel wattage I can put on a 200 amp hour battery bank
My goal is to have 800 amp hour battery bank and 1000 to 1200 watts of panels I live in south Louisiana. I want to do by alternating buying batteries and panels, without getting out of balance I don’t have a lot of space so I’m thinking of 300w panels. I’m a 80 year hvac tech I don’t have trouble with wiring and putting the system together but I don’t have a lot time to size and match components any help and advice will be appreciatedDepending on region 200-400W of solar matches 200Ah of usable storage as a wild hat guess generalization. 200W panels is about the minimum for 100Ah at my latitude
What is the time period you wish to grow in? And how many Ah are needed for your end goals?
If I may gently suggest - it helps to pin things down. Just to confirm, when you say 200ah and 800ah you mean 12v? (as apposed to 24v or 48v)My goal is to have 800 amp hour battery bank and 1000 to 1200 watts of panels I live in south Louisiana. I want to do by alternating buying batteries and panels, without getting out of balance I don’t have a lot of space so I’m thinking of 300w panels. I’m a 80 year hvac tech I don’t have trouble with wiring and putting the system together but I don’t have a lot time to size and match components any help and advice will be appreciated
Thanks
Thanks if I would put a 300 W panel extra on my 200 W panels on my two Amp hour battery would heard anythingExtrapolating my larger system downward, and assuming similar consumption (mine is hefty), weather/sunlight available - I get 800w of panel -> 200ah@12v for 80% DOD.
My best advice is to start with 400w suggested by @12VoltInstalls but leave room to double it as you see how the system performs.
I am staying with 12 hours everything in the camper is 12 V and all the runs will be real short so the wiring size wouldn’t be any problemIf I may gently suggest - it helps to pin things down. Just to confirm, when you say 200ah and 800ah you mean 12v? (as apposed to 24v or 48v)
There's nothing wrong with 300w panel and 200ah @ 12v battery - won't hurt anything to get started. In fact, its really good (in my experience) to just get started but leave room to grow. Things will make so much more sense after you have a working system! Don't worry about 'out of balance' to get started at this smaller level
I am staying with 12 hours everything in the camper is 12 V and all the runs will be real short so the wiring size wouldn’t be any problem
Oops 12 VSorry Twelveoaks instead of 12 hours
You should have a "Charge Controller" between the panels and the battery. Its Panels -> Charge Controller -> Battery.Thanks if I would put a 300 W panel extra on my 200 W panels on my two Amp hour battery would heard anything
Your controller should be rated in max amps and max volts. That will tell you how many watts of panels that you can attach to it.I have a 50 amp dc to dc charger and mppt charge controller
Two 100W with a 300W could limit your net nominal input to 400W or less due to electrical functions.Thanks if I would put a 300 W panel extra on my 200 W panels on my two Amp hour battery would heard anything