Eco-worthy 20a MPPT controller
Last month I purchased the Eco-Worthy 20a MPPT controller from their website for $89 plus $24 shipping. Right now it says $102.50 and free shipping. You can see them on ebay with free shipping and if ...
Forum Discussion
With long daylight you could go without needing the gen. It is all math that can be roughly estimated.
A second battery would help by the fact that with the same amps but twice the battery bank size in AH, you can keep the constant amps going to a higher SOC before tapering must start, with that lower "charging rate"
Also the same useage in AH will not use as much SOC going down due to Peukert working for you, which means less for the solar to do going back up again. iaw get the second battery!
In summer with seldom using the gen, with four batts and 8amps at noon: Flat 56AH/day, tilted 70AH day, tracking 90AH/ day.
You have about twice the amps and should have half the batts. IMO you should have little use for the gen. The weakness is in having enough reserve with only two batts for a couple cloudy days in a row, for the solar to catch up once the sun comes out again. That's where a shot of gen in the morning for instant catch up becomes critical.
A second battery would help by the fact that with the same amps but twice the battery bank size in AH, you can keep the constant amps going to a higher SOC before tapering must start, with that lower "charging rate"
Also the same useage in AH will not use as much SOC going down due to Peukert working for you, which means less for the solar to do going back up again. iaw get the second battery!
In summer with seldom using the gen, with four batts and 8amps at noon: Flat 56AH/day, tilted 70AH day, tracking 90AH/ day.
You have about twice the amps and should have half the batts. IMO you should have little use for the gen. The weakness is in having enough reserve with only two batts for a couple cloudy days in a row, for the solar to catch up once the sun comes out again. That's where a shot of gen in the morning for instant catch up becomes critical.
