Solar Panel Wiring


I’m half way through converting my van, the electrics are done and for the most part working.

I have x2 100w Renogy solar panels with a 50a DC-DC Battery Charger, the alternator charger is working fine but I’m getting nothing from the solar side. I’ve tested the system with a multimeter and I’m getting a complete circuit from all element. The only strange thing is that it only shows as a complete circuit when I connect the positive of the multimeter to the negative on the solar circuit and positive on the multimeter to negative in the solar circuit. The multimeter is just a connection to complete the loop so the way around they are connected should be indifferent, no?

Only questions I’m left with is can power only flow through a solar panel in one direction? If so, is there a possibility that the tails on my panels have been manufactured around the wrong way. I’m included to switch the positive and negative at the DC-DC charger so see if it solved the issue but don’t want to do this if it could cause damage?

Any suggestions would be much appreciated! I’m impatient to wait for Renogy but always have this as an option I guess.


I do not know much about the dc to dc chargers, but I do not see why you would run your solar panels to it. Do they not run directly from the charge controller to the batteries? Or is it some type of combination device?

If the charge controller is not hooked up to the batteries and the solar panels are hooked to the controller you could have fried it.