geo3geo

Not totally sure, I'll have to see if I can get the top off.

Not used this for a year as an economy measure and trying to reactivate it. Short inrush of water when inline water valve was opened. After 5 mins the red light comes on (up to temp I think) but no water out of the tap! Am I missing something obvious? Can't see any on/off control.

On 26th Jan I had my faulty loft PV inverter replaced. I opted for a Solis 1.5KW as it's the same as I installed myself on a garden array a few years back. The next day, about 8:30am the mains tripped on earth leakage. I reset it and everything was ok. Next day, the same again, and the penny dropped. I examined my weatherstation logs for solar intensity and sure enough the trip was just at the point the inverter started to export. For 10 days now I've been trying different combinations of isolating supply loops to home in on the problem. I'm now 99% sure that the problem is some sort of interaction between the two inverters. If I unplug the garden inverter from the mains there is no morning trip. Connect it and there's a trip. And when it trips, if I reset it straight away it usually trips again 5 minutes later when the loft inverter starts exporting again. If I reset it a second time it stays reset. The fact that the inverter is fine on the second trip reset implies it's not a high residual earth leakage issue. To be sure, I've isolated the garden cable run (underground armoured) and unplugged everything and checked E-L and E-N resistance - no obvious issue. Does anyone have any bright ideas? Thanks

Thanks everyone for the feedback!

My 11 yr old inverter has died and it seems straightforward enough to fit a replacement myself. But it's not clear from what I've found online whether I can legitimately do this. I'd appreciate any feedback on the following. 1. Reading my FIT meter reading declaration (to my EDF supplier) they are only interested in PV panel generating capacity increases, inverter change is not mentioned, so do I need to inform them ? 2. Is there any legal requirement to use a 'qualified electrician? Or indeed an MCS certificated electrician? 3. Do I need to send a G98 form to connect the new invertor to the grid. 4. The original installation has all the MCS certifications, do I need to get this updated, presumably via an MCS approved person? The last thing I want to do is risk loosing my generous FIT rate ! Many thanks for any advice

I had my Solis 1.5kW Mini S6 Solar Inverter approved by DNO. Let me have your email If you want be to send the certification docs, they cover a wide range of units. May help.