Solar PV Hints, Tips & Troubleshooting

This is for the B51100 modules I got:

Dyness themselves said to not go over 50a per battery and when you select Dyness LV as the battery (on the solis) it just adds 50a per battery as the BMS sends over anyway.

If its a fairly new Eddi are you sure its not got the inbuilt hub? They updated both Eddi and Zappi to have an inbuilt hub also allows the two to communicate via wifi/ethernet instead of radio communication protocol they used to use

Got panels installed almost 2 weeks ago. It rained for first time on Friday night and the RCD tripped. Was suspicious about solar panels and when googled came across a UK thread where similar happened. Anyone else encounter this?

Yeah the general RCD. There is a separate box the solar panel guys put next to fuse box. Not sure what's in there

A reminder, anyone with Electric Ireland to submit their readings today to avoid paying the 25% increase later in the month on them

It's rained on an off all weekend and RCD only tripped that one time. Maybe it was a coincidence? Should we wait and see if happens again before contacting installer .

I'll check with installer, likely has seperate RCD as theres a new box next to fuse box. No outside lights or anything like that .Even if does happen in future and caused by solar panels, there's no risk etc other than inconvenience of resetting rcd? Yeah it's an old RCD

My RCBO has been tripping constantly until I started isolating the panels before I flicked it back on. Was told to disconnect the earth at the panels and since then has been hell of a lot better. Trips maybe every month or 2 now. Next is to upgrade RCBO to Garo see will it fix it completely.

My inverter's RCBO trips whenever there are sustained high winds. Probably happened 2 or 3 times over the last year. I live in a rural area with above ground ESB cables. Told it happens to others in similar installations.

Been awhile since I did electrotechnology (30+ years!!), but wondering if high winds would swing the wires and change the impedance on the cables due to the differences in distance of live & neutral. Just throwing it out there.

Sam, ground mounted. Yeah, it's probably ok. Dunno. Just wouldn't like to see you get a ZAP. It's odd that the problem went away when you decoupled the earth, that would suggest that you have some leakage. Could it be the case of coincidence over correlation?

How high? First time? I get them when exporting >5kW occasionally. Nothing can be done about it (except limiting export lower), I have an 8V drop from my inverters 60m away from the house so if the grid is running high 240s, my inverters have to break 253 where they would just tick out themselves. Voltage in the house never goes above 253 when measured at the socket so I'm not worried. You should plot your voltage at multiple points in the house when you're feeding in. If it's happening when you're not feeding in might be worth getting the ESB out to install a logger.

See blue for inverter and yellow for house here today:

Wouldn't be too worried about the grid pulling unless it's sustained, could just be slow update rate on the inverter's display.

Yep, North county Dublin!!

and seemed to resolve itself at about ~6pm..