Grape Solar panel

[Hermbike]

Does anyone know much about the Grape Solar panel. I don’t think mine has been working since I got my unit. I had the dealer check it soon after I bought my Thor Citation and they advised it was working ok. However the meter does not show any reading and my house battery loses charge in storage with the main switch being turned off.

[Isaac-1]

You can test the output with a simple multimeter, such as https://www.harborfreight.com/electr...ter-64018.html

[Jpetzrick]

Sounds and looks like you may have a problem on the battery side. There should be fuses on both sides of the controller and since you have nothing on the screen I think you have no connection to the battery. Could be a blown fuse or bad connection. Get a VOM as suggested and check for voltage on inputs (solar panels) and output (battery). Most solar charge controllers get power from the battery to work (screen display and control logic). If battery is not connected nothing works. Once you know which side is at fault trace voltage back along the path of the wires to where the break is and correct it. Hope that helps.