I recently installed an EG4 3000EHV-48 inverter and have observed some unexpected behavior. During nighttime, with no ambient light due to cloud cover, I measured approximately 27.3 volts DC across the PV input connections. This measurement was taken after disconnecting the PV wires from the inverter, ensuring that the voltage was present directly at the PV input terminals. Currently, only a LiFePower4 51V battery is connected; the system is not connected to grid power, nor is there any load.
Additionally, I've noticed that the inverter's fans have been running continuously throughout the night, despite the absence of solar input and active loads.
Questions:
- Is it typical to observe voltage across the PV input terminals at night under these conditions?
- Could this residual voltage be causing the fans to operate continuously?
- Has anyone else experienced similar behavior with this inverter model?
I would appreciate any insights or suggestions from those familiar with the EG4 3000EHV-48 inverter.
