Cs111

Just thought I’d update the thread. After some investigation and phone calls I got in touch with guys who set up and also work(ed) for sun renewables. Came out yesterday and also today and found a connector on one of the panels had overheated. All sorted now. Glad I didn’t try myself as I would have never found it. One of the guys spent 4 hours yesterday on the roof testing and removing panels and couldn’t find the problem

Ummm ok. Don’t want to be taking any unnecessary risks to be honest. If I isolate the dc connections ( 2 black wires and the other 2 black wires with red tops going into the invertor from the solar panels ) also switch off the AC isolator will there still be a danger from the panels themselves when disconnecting them one by one and checking over the connectors?

Yea just checked invertor screen and the fault has swapped to mppt2 now showing 0w. so that confirms it’s a panel, connection fault. Next step I guess it to check each panel one by one. Is it safe to do this with the invertor , ac switch off ?

Just swapped over the 2 sets of wires and it’s now showing the same message except state 523. Instead of state 522. i will check the mppt tomorrow when there is some daylight why would U PV1 be showing approx twice the V of U PV2 ? Also so here is a screenshot from fronius regarding the 2 codes , 522 and 523. Note 523 is slightly different from 522

Ok so I had a look in attic and followed the 4 black wires from the roof right down to the inverter and no other isolator or switches of any type. Had a look at the quarter turn knob on the bottom of the invertor, it says disconnect beside it if that helps

Il have a quick look later and update but not that I know off. There are a couple of guys on here that have an install by the same company, perhaps they can also comment on the isolator or lack off

There is a quarter turn knob under the inverter if you look just to the left of the red wires

Here are a couple more pics Showing mppt1 and mppt2 So you mean swapping over the 4 black cables ( 2 with red tops ) i don’t think they will simply unplug but will have a closer look later tonight and made sure I switch everything off just incase

I know some of you guys have panels from sun renewables who I also understand are no longer trading. Though companies house have them as still active. I’m after some advice really. fronius inverter, sharp panels I noticed that there is only approx half of the normal kw of electricity being produced by the panels over the past week - would days. We have a 4kw system split into 2 strings, today we were only seeing about 1300w. - 1800w On inspection of the fronius primo inverter there is a code STATE 522 DC1 Input Voltage too low It seems to be showing 0w - 10w being produced on dc1 and normal production or approx 1600w - 1800w on dc2. any ideas would be appreciated