Water pump amp draw?
I am researching installing solar on my 1987 Scotty retro camper. It is currently put away and winterized and will be for at least another month. I converted it to LED lights last year. It has no m...
Forum Discussion
Our pump draws 6 amps per the TriMetric.
Here is a way to determine how much solar you need based on the Ah rating of your battery(s) at the 20 hour rate.
based on a 5% to 13% typical rate of charge. 5% is OK for weekend/seasonal use, 10% or above is recommended for full time off grid charging (and if you have "significant" day time inverter/battery loads:
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.05 rate of charge = 198 Watt array minimum
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.10 rate of charge = 395 Watt array nominal
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.13 rate of charge = 514 Watt array "cost effective" maximum
Just remember at best you will get 6 hours per day of charging.
Here is a way to determine how much solar you need based on the Ah rating of your battery(s) at the 20 hour rate.
based on a 5% to 13% typical rate of charge. 5% is OK for weekend/seasonal use, 10% or above is recommended for full time off grid charging (and if you have "significant" day time inverter/battery loads:
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.05 rate of charge = 198 Watt array minimum
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.10 rate of charge = 395 Watt array nominal
• 210 AH * 14.5 volts charging * 1/0.77 panel+charge controller derating * 0.13 rate of charge = 514 Watt array "cost effective" maximum
Just remember at best you will get 6 hours per day of charging.
