I have 2 6500's setup in split phase. Been running for several months no problem. Then in July, the system went down with a PV over voltage error on one unit and the other unit had a blank display. I completely disconnected the PV inputs. After several calls and emails to SS support, they sent me a replacement display for the one affected unit which appears to be working fine. However, the other unit still shows PV input on and off with that annoying beeping.
Per SS support, I updated the affected unit MCU and DSP to the latest firmware. I also changed the setup as standalone.
When the unit restarted, it still shows PV input around 80 to 83 volts which triggers MPPT and the unit beeps and it starts inverting even though the only input is from the batteries only. PV and Grid inputs are completely disconnected. After a few seconds the voltage drops to below 80v and the MPPT shuts off triggering more beeps. This happens over and over which is quite annoying.
I have attached photos of the bad unit PV inputs. PV2 shows no voltage. PV1 shows voltage and amperage. When the inverter is turned off, the voltage goes away on PV1.
Somehow, the voltage from the inverter is backfeeding on PV1.
Any other ideas?
Per SS support, I updated the affected unit MCU and DSP to the latest firmware. I also changed the setup as standalone.
When the unit restarted, it still shows PV input around 80 to 83 volts which triggers MPPT and the unit beeps and it starts inverting even though the only input is from the batteries only. PV and Grid inputs are completely disconnected. After a few seconds the voltage drops to below 80v and the MPPT shuts off triggering more beeps. This happens over and over which is quite annoying.
I have attached photos of the bad unit PV inputs. PV2 shows no voltage. PV1 shows voltage and amperage. When the inverter is turned off, the voltage goes away on PV1.
Somehow, the voltage from the inverter is backfeeding on PV1.
Any other ideas?