My parent's solar inverter died after 5 years of good service.
It's a called hybrid inverter:
- It can go with or without batteries
- It has 2 MPPT (8 330W panels in 2 strings) -> 5280Wp
- A 20kWh lithium battery previously used in a Nissan leaf (14S at 4.1V max) -> 57.4V
Panel is showing error 17 and the battery connection has disappeared. On the other hand, is delivering load, MPPTs are working and it's exporting energy to the GRID. Not that "bad".
Let's open it......
I see that 150A fuse is gone and the DC input is shorted.
This is the summary I've seen when I removed the PCB from the cabinet:
Red is bad.......green is OK
1st question: Is it ok to just change the 8 mosfets from the right as long as they go in groups of 4? Otherwise this repair will cost quite a lot :-)
As soon as I've removed the TVS(4) and all the mosfets input shortcircuit has been removed............. but there are other possible shorts......which maybe are "ok".
I am trying to understand the short on D16........but I haven't found it yet........maybe there is a reason behind it.
Regards,
Francesc.
It's a called hybrid inverter:
- It can go with or without batteries
- It has 2 MPPT (8 330W panels in 2 strings) -> 5280Wp
- A 20kWh lithium battery previously used in a Nissan leaf (14S at 4.1V max) -> 57.4V
Panel is showing error 17 and the battery connection has disappeared. On the other hand, is delivering load, MPPTs are working and it's exporting energy to the GRID. Not that "bad".
Let's open it......
I see that 150A fuse is gone and the DC input is shorted.
This is the summary I've seen when I removed the PCB from the cabinet:
Red is bad.......green is OK
1st question: Is it ok to just change the 8 mosfets from the right as long as they go in groups of 4? Otherwise this repair will cost quite a lot :-)
As soon as I've removed the TVS(4) and all the mosfets input shortcircuit has been removed............. but there are other possible shorts......which maybe are "ok".
I am trying to understand the short on D16........but I haven't found it yet........maybe there is a reason behind it.
Regards,
Francesc.
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