My setup on my off grid RV is
4 x 100w renogy panels, connected in parallel
Rover 40a mppt controller
Single 12v sealed battery
There is some moderate shading on the panels at any given time, but typically at least one panel is in full sun. I've taken readings at the terminal ends of the cables from panels to the controller before hooking the controller up, and I'm getting a solid 20v, but only 3 to 6 amps at any given time. After hooking up the system, however, the controller is only ever showing 12 to 14v from panel, which, as confirmed by renogy tech support, is not enough to allow the charge controller to enter a bulk charge state. I'm also confused as to why the controller shows a different panel voltage than I'm getting with the multimeter. The controller also only ever shows 0.0A going into the battery. I tried to measure the current going to battery today and blew the fuse in my multimeter
Another thing i notice is that the battery voltage (as displayed by charge controller) fluctuates based on incoming panel voltage. If the battery is down at, say, 12.3 before the sun is up, after we get some light it can increase to typically between 12.6 and 13.4, even though that is not the actual voltage state of the battery. Should I be concerned?
Can anyone help me figure out what I need to change to get my batteries charging? I'm completely in the dark about what the problem could be and I'm going to need this solar system to work to run my heater at night.
4 x 100w renogy panels, connected in parallel
Rover 40a mppt controller
Single 12v sealed battery
There is some moderate shading on the panels at any given time, but typically at least one panel is in full sun. I've taken readings at the terminal ends of the cables from panels to the controller before hooking the controller up, and I'm getting a solid 20v, but only 3 to 6 amps at any given time. After hooking up the system, however, the controller is only ever showing 12 to 14v from panel, which, as confirmed by renogy tech support, is not enough to allow the charge controller to enter a bulk charge state. I'm also confused as to why the controller shows a different panel voltage than I'm getting with the multimeter. The controller also only ever shows 0.0A going into the battery. I tried to measure the current going to battery today and blew the fuse in my multimeter
Another thing i notice is that the battery voltage (as displayed by charge controller) fluctuates based on incoming panel voltage. If the battery is down at, say, 12.3 before the sun is up, after we get some light it can increase to typically between 12.6 and 13.4, even though that is not the actual voltage state of the battery. Should I be concerned?
Can anyone help me figure out what I need to change to get my batteries charging? I'm completely in the dark about what the problem could be and I'm going to need this solar system to work to run my heater at night.
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