Fascinating. I just had the same experience. 18k was running for 7 or 8 months flawlessly, the suddenly a couple of days ago batteries were giving an error. I got to troublesboot with them quickly, though, and concluded shorted DC bus, which they also told me was really uncommon.I purchased a EG4 18Kw pv inverter about 7 months ago and it's been in operation for about 6 months now. I'm not the type of person to usually comment
publicly on a product or vender, but I believe I have to in this case.
In my opinion the EG4 18Kw pv inverter is great. So easy to pickup and set the parameters, it's smart and does so many things, has great software (no surprises
always works), easy software updates and compatible with a lot of aftermarket software and equipment, examples: solar assistant, many battery manufactures, BMS manufactures and much more. Lots of product information on the internet and solar forums. Very interesting reading what other owners are doing with inverter.
I didn't have much input about Signature Solar until two weeks ago. Yes there sales people were good and they had good help getting set up but really
with no problems and such an easy inverter to use I didn't have much contact with them.
So I had a problem recently, battery wouldn't charge or discharge. My thoughts, something wrong with my BMS, inverter, or maybe communication or whatever.
I looked for the obvious problems, no luck. Well looks like Signature Solar needs a call so I can get tech support. I tried emailing a tech which helped me set up, never did get a reply back. So I tried calling, I thought this ain't going after a few calls. I found if I called early and waited on line for about 15 minutes it worked got through.
Keep in mind the following is my experience with Signature Solar and it is so different from what I've been reading. SS once I made initial contact with a tech was
a very good experience. In fact so good I felt guilty not giving positive input. So this is it my input and a little summary of problem and SS's resolution.
So pinpointing problem (battery wouldn't charge or discharge) wasn't easy, not necessarily the inverter. I had to take a lot of pictures, videos and make many
voltage and ohm tests. Lots of messaging, phone conversation, and different people I was involved with. Their final determination and resolution was shipping inverter
back and shipping me a new inverter. I believe there is a short in DC buss, they said they want to check out this inverter never had anything like this. According to SS
they don't have many problems with this inverter. I asked if they would let me know what the problem is and what caused it. So I'm waiting for that answer.
As a final note I would like to thank SS people who worked hard for me.
Ethan Greeley, Payton Pearsall, Jared Routon, Chris, Na Tahsa
What I don't like is the wait for RMA, shipping times, etc. I wish they would ship one with a cc hold and give a week to ship the other back. Like with phone trade ins. If it weren't for that inconvenience, and now seeing you have the same issue, they've been good to work with for me.
Odd you have that same issue.