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Givenergy woes
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I have an earth rod for my EPS system.
How was your EPS setup, did your electrician / installer design it and say its OK then?
Is your system working again now, I'm glad it's sorted if that's the case!
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I've seen schematics where the EPS switches a three-pole contactor. This contactor uses two poles to switch the EPS-protected circuits over to the EPS supply, and the third one switches the earthing from TN-C-S to TT.ispookie666 said:As EPS circuits need a separate way to earth in a TN-C-S system when in island mode. Makes sense, but was not sure if this was the cause of the failure.
I do have an earth rod next to oil tank and the oil feed pipe is earthed to it, will need to check with the installer if this will work or will need a new/alternate way of earthing.
How have others who have EPS/UPS or backup systems configured the earthing?
But consult your electrician, not some random bod on t'internet.
N. Hampshire, he/him. Octopus Intelligent Go elec & Tracker gas / Vodafone BB / iD mobile. Ripple Kirk Hill member.
2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 34 MWh generated, long-term average 2.6 Os.Not exactly back from my break, but dipping in and out of the forum.Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs, Best kettle!3 -
@Mikeyboy01443 Unfortunately I was working when the last bit of the installation was done and did not check. I suspect the installer falsely believed the boiler was supplied from the EPS circuit (due to it being in the garage) which along with the oil tank is earthed via an Earth rod.
@QrizB I'll get the installer to comeback and have a look at the contactor and wire it to the earth rod or have a new one put installed.“Don't raise your voice, improve your argument." - Desmond Tutu
System 1 - 14 x 250W SunModule SW + Enphase ME215 microinverters (July 2015)
System 2 - 9.2 KWp + Enphase IQ7+ and IQ8AC (Feb 22 & Sep 24) + Givenergy AC Coupled inverter + 2 * 8.2KWh Battery (May 2022) + Mitsubishi 7.1 KW and 2* Daikin 2.5 KW A2A Heat Pump1 -
Great to hear you are getting some satisfaction at last.ispookie666 said:Update
The engineer came out today. The main board of AC coupled inverter was fried, changed over very quickly. At the same time disconnected the EPS. As EPS circuits need a separate way to earth in a TN-C-S system when in island mode. Makes sense, but was not sure if this was the cause of the failure.
I do have an earth rod next to oil tank and the oil feed pipe is earthed to it, will need to check with the installer if this will work or will need a new/alternate way of earthing.
How have others who have EPS/UPS or backup systems configured the earthing?Northern Lincolnshire. 7.8 kWp system, (4.2 kw west facing panels , 3.6 kw east facing), Solis inverters, Solar IBoost water heater, Mitsubishi SRK35ZS-S and SRK20ZS-S Wall Mounted Inverter Heat Pumps, ex Nissan Leaf owner)1 -
I'm think there are a lot of restrictions regarding placing any kind of switch in the earth circuit (for obvious reasons). Make sure your electrical contractor is up to speed with the regs & the contactor can withstand 60/80/100a long enough to blow the main fuse.ispookie666 said:@Mikeyboy01443 Unfortunately I was working when the last bit of the installation was done and did not check. I suspect the installer falsely believed the boiler was supplied from the EPS circuit (due to it being in the garage) which along with the oil tank is earthed via an Earth rod.
@QrizB I'll get the installer to comeback and have a look at the contactor and wire it to the earth rod or have a new one put installed.
I don't see any reason why you shouldn't have a supplementary earth rod in addition to the pme supply. It's just extra protection in the unlikely event that there's a multiple earth failure. If there's a reason for isolating the pme during a EPS event I'd be interested to know what it is.4kWp (black/black) - Sofar Inverter - SSE(141°) - 30° pitch - North LincsInstalled June 2013 - PVGIS = 3400Sofar ME3000SP Inverter & 5 x Pylontech US2000B Plus & 3 x US2000C Batteries - 19.2kWh2 -
Glad to learn it's been sorted. Fingers crossed it stays that way. It would certainly be interesting to learn what may have caused the PC to fry. Presumably you've not been billed for the engineer turning out!
East coast, lat 51.97. 8.26kw SSE, 23° pitch + 0.59kw WSW vertical. Nissan Leaf plus Zappi charger and 2 x ASHP's. Givenergy 8.2 & 9.5 kWh batts, 2 x 3 kW ac inverters. Indra V2H . CoCharger Host, Interest in Ripple Energy & Abundance.1 -
My electrician installed a buried earth rod for me before I even realised that was what I wanted. It serves all circuits.ispookie666 said:How have others who have EPS/UPS or backup systems configured the earthing?Reed1 -
What i dont get is you said you had tested the EPS before?
Was it setup so that it was a ticking time bomb and would have fried eventually?
I tested my EPS aftet install but it wasn't long, couple of minutes maybe... its making me wonder if i should test it out 🤔0 -
The contactor may just bond the spiked earth to the pme earth without introducing a switch to the pme earth?4kWp (black/black) - Sofar Inverter - SSE(141°) - 30° pitch - North LincsInstalled June 2013 - PVGIS = 3400Sofar ME3000SP Inverter & 5 x Pylontech US2000B Plus & 3 x US2000C Batteries - 19.2kWh1
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Did you get to the bottom of whether it was a Givenergy problem or an incorrect install?ispookie666 said:@Mikeyboy01443 Unfortunately I was working when the last bit of the installation was done and did not check. I suspect the installer falsely believed the boiler was supplied from the EPS circuit (due to it being in the garage) which along with the oil tank is earthed via an Earth rod.
@QrizB I'll get the installer to comeback and have a look at the contactor and wire it to the earth rod or have a new one put installed.PV total 19.8 kW system:
23 x 420W East/West split over two flat roof areas at 10 degrees inclination.
13 x 390W South spit over two flat roof areas at 5 to 20 degrees inclination.
6 x 390W south wall mounted at 90 degrees inclination.
7 x 390W West wall mounted at 90 degrees inclination.
2 x 5 kW hybrid inverters
4 x 9.5 kWh batteries (38 kWh total)0
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