Need some advice on wiring new controller to pre existing solar charging system

[Kevin D Pem]

If only one panel is bad take that panel out of the circuit. A panel with that many cells should be putting out about 56 volts.

Yes if one is bad it will bring down the system. However you still need a controller that will handle the panel. The controller I showed you is the best for the money I have found. Another place you can find it is on aliexpress.com it has been rumored that they only make the 60amp controller and sell it as 30,40,and 60amp but I have not confirmed that.

I do understand the money issue, I work around it everyday. I have been volunteering my time to help others with financial concerns set up solar so they can reduce costs while off grid. That is what I do!

 

[TXheat]

If only one panel is bad take that panel out of the circuit. A panel with that many cells should be putting out about 56 volts.

Yes if one is bad it will bring down the system. However you still need a controller that will handle the panel. The controller I showed you is the best for the money I have found. Another place you can find it is on aliexpress.com it has been rumored that they only make the 60amp controller and sell it as 30,40,and 60amp but I have not confirmed that.

I do understand the money issue, I work around it everyday. I have been volunteering my time to help others with financial concerns set up solar so they can reduce costs while off grid. That is what I do!

Apparently the smaller panel was connected, I took readings with it connected., each panel is around 20.7 or so, after disconnecting it, I'm Still getting 20 open circuit, how do I figure out which is the faulty panel? Is it possible it's not a panel issue but something shorted in the panel wiring? I appreciate your help and how you help others.

 

[Kevin D Pem]

Disconnect wires at panels and check each panel out of circuit.

 

[TXheat]

The connectors on each panel are under the panel, requiring unmounnting them, is there another way? Right it’s fairly overcast so I will have to wait to test.

 

[Kevin D Pem]

The connectors on each panel are under the panel, requiring unmounnting them, is there another way? Right it’s fairly overcast so I will have to wait to test.

Yes if they all3come in the RV,

 

[TXheat]

Yes if they all3come in the RV,

I don't understand

 

[Kevin D Pem]

I don't understand

hard for me to use the phone so I cut it short and then sometimes you ge a cryptic response.

if the connections are inside the coach then you can separate them inside and measure the voltage there. If the junction is in a box on the roof do it there. No matter you will have to separate the panel connections to measure the voltages, and isolate the bad panel.