My 18KPV also toasted itself earlier this year (beginning of April) for no apparent reason.
I have the following kit EG4-18Kpv & EG4-PowerPro WallMount Battery
The system had been running fine for 3 months (Jan-March) and I shut it all down while I was on vacation for a week.
When I got back from vacation and powered up the system I got no AC Out in the other room. So I walked back to the unit to make sure I hadn't missed a step and heard a "pop + hiss" from the unit. I immediately shut down all breakers/switches and called Signature Solar.
Signature tech support had me power it back up again, first from the battery (did not power up) and then from the solar (powered up) however within a minute of powering up it began to hiss and smoke again...
My current conclusion is that the battery side burnt out first and then something else burnt out after that.
At that point they told me that they would do a "good faith warranty replacement" but never really explained why my system would fry itself on startup after working fine for 3 months prior.
Their instructions were to return the inverter with all of its parts so I included everything that had come in the box.
I received a scuffed up refurbished unit several weeks later and the box did not contain a number of the original parts including the parallel cable, battery communications cable, mounting brackets (kind of important!), mounting bolts and through hole covers.
I called Signature about the missing parts immediately and they said they would get them right out to me. Then they emailed me and told me that the parts had to come from EG4. 2 weeks later I am still waiting for the parts and Signature says that EG4 is not giving them an answer.
Has anyone else had one of these EG4-18KPV units burn out for no apparent reason?
