Our PV solar keeps shutting down as the DNO supply via Last Mile Asset Management is goving over voltage i.e. over 230V +10%. If the grid exceeeds 253 V the pv solar is not legally allowed to export.
It has happened before , they denied it but mysteriously it was sorted.
On the Money Saving Expert forum it seems quite a common issue.
Are others on here having / had the same problem & how did you fix it?
As suggested in video a larger storage battery bank would help if not completely solve, but appreciate the larger extra investment. Couldn't better control of pv output though
. The mppt controller directly acting on the dc output of panels and likely integrated into the invertor ought collectively be clever enough to limit excess output affecting local area voltage. In my own experience installing PV panels on a boat, a nominal 12 volt one by itself will happily sit all day in bright sunshine off load showing just over 20 volts.
Accept that new homes being built with pv arrays only exaggerates the situation though. Whether you have an export contract with your electricity supplier or not I believe a pv array will still export power from your home to the local 240 volt distribution area. If this power cannot get absorbed in turn by local homes voltages will rise. I understood this is why there was a blanket limit for an individual homes pv array max output of around 3.7kw before approval was needed.
