brazengoat
New Member
- Joined
- Jan 26, 2022
- Messages
- 8
I just finished installing my system as shown in the attached pic. Here's a quick rundown of my system.
I have been running the inverter and batteries without the PV arrays (just using power from the grid) for a couple of months now without any issue. I finally finished mounting my solar panels and hooked them to the inverter. Everything works just fine until I turn the grid connection to the inverter on. Within a minute or two of flipping the breaker on from my main panel, the inverter throws a F12 error, which reads: GFCI Fault. Leakage current exceeds the limit. This also happens at night while there is no voltage from the PV arrays.
According to the manual, the LVX6048WP, being a non-isolated inverter, requires that the panels are not grounded. From what I understand, that means that neither the positive nor negative wire should be connected to ground. That does not mean that the panel frames themselves should not be grounded. Am I correct in my understanding?
In trying to diagnose the issue, I've done some probing with a multimeter. Here's what I found:
While the PV array is disconnected from the inverter:
- Two arrays of 11 Jinko 265W Class A poly panels. Each array puts out around 380V. They are both on the same ground mount about 200ft from the inverter/main panel.
- LVX6048WP Inverter.
- Two Jakiper 48V batteries.
I have been running the inverter and batteries without the PV arrays (just using power from the grid) for a couple of months now without any issue. I finally finished mounting my solar panels and hooked them to the inverter. Everything works just fine until I turn the grid connection to the inverter on. Within a minute or two of flipping the breaker on from my main panel, the inverter throws a F12 error, which reads: GFCI Fault. Leakage current exceeds the limit. This also happens at night while there is no voltage from the PV arrays.
According to the manual, the LVX6048WP, being a non-isolated inverter, requires that the panels are not grounded. From what I understand, that means that neither the positive nor negative wire should be connected to ground. That does not mean that the panel frames themselves should not be grounded. Am I correct in my understanding?
In trying to diagnose the issue, I've done some probing with a multimeter. Here's what I found:
While the PV array is disconnected from the inverter:
- I get a 380V reading between the positive and negative of each array.
- I get a 0V reading from both the positive and negative to ground.
- I get a 40V reading from the positive and negative of the input of the inverter. When I probe from the positive to my main panel ground, I get 260V (that is with the PV arrays and the grid disconnected!)
- While the grid is connected, if I probe from the positive of the input of the inverter to my main panel ground, it will immediately cause the F12 fault even though the PV arrays are not connected.
- I get a 270V reading from positive to ground and a 10V reading from negative to ground
- I get a 330V reading between the positive and negative of each array.