Troubleshooting Renogy MPPT Charge Controller E01 Error
Asked by WanderlustSeeker42
I'm in the process of converting a bus into an RV, and I initially had a solar setup that was working great. However, now I've run into an issue - my Renogy 40A MPPT charge controller stopped functioning correctly. It's currently displaying an E01 error, even though my battery is charged and all the voltages seem normal. The solar panels are connected to the charge controller, which then connects to a 200Ah deep cycle LiFePO4 battery and a 1000W inverter. Does anyone know how to resolve this issue and get my solar panels charging the battery again?
Answers
Try this simple troubleshooting step: disconnect the solar panels and the battery, and then power the charge controller using another 12-volt battery for about 4 minutes. After that, reconnect everything in the order of battery to the controller, then the solar panels to the controller. This often resolves the E01 error.
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From what I've read, the E01 error typically indicates that the Renogy thinks the battery is over-discharged. You’ll want to make it recognize that the battery is actually charged. If you need help with how to do this, just ask!
WanderlustSeeker42: How exactly would I go about doing that?
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Have you seen Renogy's video on the E01 error? It can be super helpful! You might find it here: https://youtu.be/5BYR9UReArA?si=yjDsvD2kmwQo412D. Since you’re sure the battery is charged, you might want to check for a bad connection or a blown fuse somewhere between the MPPT and the battery.
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CuriousNomad21: Will give this a shot!
TechyTrails88: I tried this, but it's still showing E01.