How are my solar panels doing?

[Vach]

First time extended camping with my new panels and I would like to know what others think of their performance. I have two 140 watt panels and a Morningstar sunsaver duo charge controller. Highest amperage has been 12.25 which I think is pretty good. Most days peak is 7-8 amps. Highest voltage has been 14.2 volts, mostly in the mid 13's though. Controller is Programed for 14.8 volts max charge. Most mornings the batteries "rested" voltage is 14.3 to 14.4. 8 gauge wire from panels to charger and short run to bats. I read extensively and believe the install is good.

Should I be getting more than 8 amps with full sun under these conditions? Plugged in back home I did see 15.0 volts at one time. Bats are watered, no shade, connections tight. Thanks for the input.

[Golden_HVAC]

Hi,

Resting voltage is normally 12.8 at the very most, and shortly after sunrise, the voltage can climb to 14 volts if it is slowly charging.

Great system! You will enjoy it, I sure did! I could go through 120 amp hours in one day, and had a 415 watt solar system.

Your RV will consume about 35 amp hours just to run the CO, carbon monoxide detectors and the refrigerator. I have a e-meter and measure the amps going into and out of my panels, and could keep great track of them. With a larger solar system, it really does not matter, as long as you consume less than it can make.

Have fun camping!

Fred.

[Vach]

I have added load, made bread today. Volts dropped to under 12 when heating element was on. Back up to 14.4 after load removed. No shade. Like I said I think the 12 amps was good but have averaged 8 since. 50 amp hours generated under fully sunny day about half that under clouds.

[time2roll]

I would think those panels have an Isc rating of about 8 amps each.
12.25 might be about it in the Winter. Hopefully summer brings 14 to 16 amps.

With the sun fairly low have you checked for shade issues when looking for max?

[pianotuna]

Hi Vach,

Welcome to the forums.

Try adding a load--such as an inverter. That will show you how much the panels can put out.