MPPT Volts to Current Conversion
My buddy picked up 6 300 watt panels today - because he wants to be able to feed his ravenous Starlink - without running the generator. The starlink uses 190 watts of power at 120v - it's a pig for p...
Forum Discussion
1800W of solar is more than adequate to run 190W for starlink including battery discharge with clouds, night time, etc. However his battery system is totally inadequate for that much solar. The solar controller will not over charge the batteries as the batteries will only draw what they need for charging and the remaining solar power is loss unless he uses it with an inverter when the sun shines.
Best approach is to do a energy audit to determine his needs and size batteries and solar accordingly. Golf cart batteries are rated at 220 AH for 2 at 12V so he has 440 AH but best to discharge to only 50% so he has 220 AH available.
Ideally he could get 6*300=1800W/12v = 133ADC maximum from the controller minus losses.
Starlink uses 190/120 * 11 = 17A DC draw from the batteries by the inverter. But the batteries also have to power the RV lights etc. Basically a 10 to 1 draw of battery amps to convert to AC amps as in 120V/12V. I use 11 to account for losses.
Best approach is to do a energy audit to determine his needs and size batteries and solar accordingly. Golf cart batteries are rated at 220 AH for 2 at 12V so he has 440 AH but best to discharge to only 50% so he has 220 AH available.
Ideally he could get 6*300=1800W/12v = 133ADC maximum from the controller minus losses.
Starlink uses 190/120 * 11 = 17A DC draw from the batteries by the inverter. But the batteries also have to power the RV lights etc. Basically a 10 to 1 draw of battery amps to convert to AC amps as in 120V/12V. I use 11 to account for losses.
