My MPPT has been working fine and I have done no recent alterations, but now it has stopped. showing watts or amps. The unit also flashes both lights (yellow and green) almost in sync at fast pace. I have two lithium 100 Ah battery fitted. I currently connected on mains charger. I have tried disconnecting the mains and putting the batteries under load to see if the MPPT starts charging but it doesn't. Checked the fuses but they are ok. I have tried a few times to reset the unit.
The manual shows this for yellow and green lights flashing:
Fault situations LEDs
Charger or panel over-voltage
I’m not sure what might have caused it, but if you’ve disconnected the charger in testing, you might look at the PV Source.
Manual is here, the fault codes on page 7:
Hi @Esox67 You mention you have Lithium, but uou have a gel profile. Either change to the default Lithium profile or create one as per manufacturer specification as a start.
Hi thanks for your help. Reset MPPT and rechecked the connectors when I checked the voltage at battery end it was 5 volt less than at the voltage at the MPPT I peeled back the heat shrink on the connector (negative side) at spotted some copper oxide. Cleaned up the connector and we are working again. Puzzled as this setup is just over a year old. Will replace the entire wire when I return home. Thanks again,
