Solar panels being weird

markpb

I have 15 x 310/380w panels and a 6kW Solis Hybrid inverter installed on my roof. All was well until a few days ago when production fell dramatically, from 15-30kW per day to only 1-2kW. At first I thought it was just exceptionally overcast but today I was keeping an eye on it and I don’t understand what’s happening at all - everything seems to be working and then it stops. A few hours later, it happens again.

I’ve emailed the installer but I’m wondering if anyone here can help. There are no alerts or warnings on the panel or app.

CDC6BA6C-0549-410C-8FCB-11BF910C4D17.jpeg

35A99636-5FF9-4265-AFC5-3DE26FEB3233.jpeg

7CD95B13-1F25-4D27-9FE9-93CBF3120000.jpeg

9CD06072-7654-489E-B31C-8B345696F94E.jpeg

Edit: those photos weren’t upside down when I uploaded them!

Ubbquittious

Loose connection? Are u able to see a graph of the panel voltage?

irishchris

Strange as showing no voltage on either string. Would anyone has turned the dc disconnect switch under the inverter (small black round switch at bottom front left)

If not that have you fireman switch installed at panels? Perhaps a fault there. Any tripped breakers in your consumer unit?

slave1

Have you tried turning everything off/on?

markpb

I turned the isolator under the inverter off last night, nothing happened. About a minute later I turned it on and I could hear the automatic fireman shunt moving and the inverter started giving a No Grid warning. Then 30 seconds later, the shunt moved again and the warning went away. That doesn’t feel right to me, shouldn’t it have moved when I turned off the isolator?

I’m not 100% sure how to turn the inverter off and on. There’s a black knob on the bottom that I haven’t touched but I’m not sure if there’s more to it than that?

I tried tripping the PV fuse beside the consumer panel downstairs but it made no difference. Everything else there looks good.

reklamos

https://www.boards.ie/discussion/comment/119253686#Comment_119253686

Tyo can reboot inverter from the menu or just power off PV, AC and Battery input to inverter and it will go down.

markpb

Small update on this: the supplier thinks that the automatic fireman’s shunt might be the issue. They’re going to call me (soon hopefully) with an update.