I have a 100watt renogy panel that is giving me around 19volts and 4.5 amps at the leads going into the controller. The controller is a renogy wanderer 30amp connected to two 6v batteries in series. When connected and using the Bluetooth app I am seeing the controller getting at most 12.9 volts and 1.5 amps. I let the battery drop and reconnected and the volts from the panels were just slightly over the battery voltage level. It never goes into a boost charge mode, I have tried a brand new adventurer charge controller and got the same results. All of this was confirmed with my multimeter. I have checked all wiring multiple times and disconnected everything from the batteries except the charge controller and panel. This system worked great before, then at some point it just stopped.