ericfx1984
Solar Enthusiast
- Joined
- Oct 10, 2021
- Messages
- 763
I have a series string of four 250 w San tan solar panels
Every now and again.. usually after a few hours of heavy use I noticed that this string seems to drop in voltage and of course output in general
Typically I see somewhere between 130 and 140 volts but today I looked and it was reporting as 14 volts and I thought surely that was just an error so I took out my voltmeter and tested it at the input side of the breaker and sure enough it was reading about 14 volts
I shut the breaker off and checked it again and it was back to a little over 130 volts
I checked everything else disconnecting a few connections and reconnecting them and still right around 130 volts.. I turned the breaker back on check the app it was right around 130 volts then drop to 105 still pushing out nearly 35 amps to the battery
That was in a couple minutes it was back down to 14 volts.. I'm kind of wondering if there's not a bad panel
Every now and again.. usually after a few hours of heavy use I noticed that this string seems to drop in voltage and of course output in general
Typically I see somewhere between 130 and 140 volts but today I looked and it was reporting as 14 volts and I thought surely that was just an error so I took out my voltmeter and tested it at the input side of the breaker and sure enough it was reading about 14 volts
I shut the breaker off and checked it again and it was back to a little over 130 volts
I checked everything else disconnecting a few connections and reconnecting them and still right around 130 volts.. I turned the breaker back on check the app it was right around 130 volts then drop to 105 still pushing out nearly 35 amps to the battery
That was in a couple minutes it was back down to 14 volts.. I'm kind of wondering if there's not a bad panel