Solar Panels
Good evening all, I have a HR Class A that we purchased used. It has three solar panels on the roof that are stationary. The solar system is charging the batteries, (4 6V GC 140Ah units new this ...
Forum Discussion
1. Use a mirror and see if there is a label.
2. With full bright noonish sun disconnect the panel input wires to the controller and measure the voltage. A voltage of about 18V indicates 12V panels and use a value of 14V. Next short the wires and measure the amps. Now multiply 14V by the amps to get watts. The value is about what you can expect but not the panel amps or watts. I use a value of 67% of the mfg watts for 5 hours as there are light and wiring losses.
Now the fun begins due to weather and location. 67% is likely to high due to the lower sun elevation in Lake Stevens with your flat mounted panels and other factors but will give you a ball park estimate.
A panel cell is 1/2 volt so count the cells. 36 cells is 18V and a 12V panel. 60 cells is 30V and marginally a 24V panel, etc but this doesn't tell you the mfg watts.
Enjoyed watching GD ride her horse in a Lake Stevens event last week.
2. With full bright noonish sun disconnect the panel input wires to the controller and measure the voltage. A voltage of about 18V indicates 12V panels and use a value of 14V. Next short the wires and measure the amps. Now multiply 14V by the amps to get watts. The value is about what you can expect but not the panel amps or watts. I use a value of 67% of the mfg watts for 5 hours as there are light and wiring losses.
Now the fun begins due to weather and location. 67% is likely to high due to the lower sun elevation in Lake Stevens with your flat mounted panels and other factors but will give you a ball park estimate.
A panel cell is 1/2 volt so count the cells. 36 cells is 18V and a 12V panel. 60 cells is 30V and marginally a 24V panel, etc but this doesn't tell you the mfg watts.
Enjoyed watching GD ride her horse in a Lake Stevens event last week.
