I want to start off saying that Signature Solar support has improved a lot since I started dealing with them last year. If you call or email, the responses are usually "try this" and then email back. However, their response typically takes days per email. First I had a battery problem that took several months to diagnose and receive a replacement because of the emailing back and forth. Now I have been dealing with a faulty inverter (6500). But I have recently had problems getting any response because for some reason my emails are ending up in a spam/junk folder. I have been without solar power since July 14. Fortunately, I set up my system to be able to switch back to all grid so I have power. I feel sorry for those that are completely off grid. My issue was finally moved to Tier 2 support but I suppose that means that they will get back to me someday. Meanwhile, my electric bill for the past month is nearing $700 bucks. I love my system when it works but right now I hate to look at it. Signature Solar support really needs to up their support game.