Omnibuswoman

i think this will be my first port of call!

where do I place the probes??

No, they are both on the same inverter. I have an app that allows me to choose how to use the batteries (to the extent that I understand what to do). I can charge them from the grid overnight at a cheap rate, then they will discharge during the day to supplement supply.

How do I check this?

Could one of you signpost me to an idiots guide to basic electrical knowledge pls? I honestly can’t have been listening in my GCSE physics class as I don’t have even the most basic understanding, beyond that multiplying voltage by amps equals power. The problem has clearly worsened the less load I have put on the system - I was aiming for @SteamyTea levels of daytime usage, and that seems to be correlated to the problem. What I don’t understand is why that is…

I could have a look at the instructions and find out if I can do that. I don’t have a clamp, and even if I did I wouldn’t have a clue what to do with it 😂

@G and J we have a Solis inverter and two 3.6kW Pylontech batteries. Our electricity supply is three phase. We have also had capability to use the inverter off-grid built in, so one of the switches is for us to disconnect from the grid and operate independently.

Hmmm 🤔 That’s quite a worry… looking back at the data I have, I’ve not had a problem of overvoltage related shut down prior to late November. Very few homes here have solar PV - we are only one of two that I am aware of. When Storm Bert passed through on 23rd Nov there was a local powercut (although my home wasn’t affected). I wonder if when restoring the power they changed something in the local supply configuration. I know from the research I did before connecting to the grid that the local supply is on its knees. The DNO were trying to surreptitiously get us to fund a local area upgrade. I will speak to our installer to ask if they’ve heard of any issues with other local people.

Thanks both. @SteamyTea that theory correlates with the power stopping when the voltage surpasses 250v, however we exported electricity all summer with no obvious issues and I would have expected that to have done the same. However I only have octopus export data for that so I can’t know what exactly the panels were doing then… @JohnMo I have two consumer units - one next to the inverter, in the workshop, and a second one in the house, maybe 15 metres away, where a very large 5 core cable comes in from the workshop. You can see the cable exiting the workshop consumer unit in the below photo.

So these show voltage but no current… I’m not sure how to interpret the voltage data. I assume that PV1 is East and PV2 West, but only because I would expect East to be higher in the morning. @SteamyTea - any thoughts? I don’t know enough about power to know what might explain this…

Caught it! See series of images below…

I think you’re right, it is live data. The numbers change when I refresh the app. What I can’t do is look backwards. I will take screenshots of the live data this afternoon at intervals, and will post up here later on.

This is all I can find. No live data for voltage.

It looks as though the information I have access to via the app is limited, unfortunately. I can’t interrogate the inverter activity other than with respect to the four main parameters, and in watts or kilowatts only.

I do have an app - Solis app. I’m not sure how to view input voltages. I’ll find out!