Inverter to Battery

[SunEagle]

Thank you @SunEagle.
i still have a 50wp panel left and a 10amp CC. Lets say that i use the pump 1 hour every day ONLY after peakhours this 50Wp system with 40Ah agm should do i think. Im able to pump 600-800 liters of water to my watertank and thats more than enough for me.

Depending on what the Imp rating of that 50w panel it may be a little small for a 40Ah battery. You need about 1/10th the Ah rating to charge an FLA type battery. For the 40Ah that would be 4 amps. You can get away with 1/12th the Ah rating or ~ 3.33amp of charging but run the risk of not getting the battery charged back to 100% each day.

[fivewin]

Ooh ok. Can i add a 20Wp panel paralel to 50Wp panel??

[SunEagle]

Ooh ok. Can i add a 20Wp panel paralel to 50Wp panel??

If the Vmp for the 20watt is within 5% of the Vmp of the 50watt you should be ok.

The Imp for those 2 panels will just add up but the Vmp will average out between the 2 panels and will reduce the output of the panel with the higher Vmp rating.