Morning,
As title - I’d expected system to be fully independent in the event of a power cut, but when I turn off the main DNO isolator to test system behaviour in the event of a power cut, AIO kicks in perfectly, but PV generation is shut off - regardless of SoC of AIO?
Is that expected behaviour? Appreciate there can’t be any export from the system in island mode, but I did still expect the solar to function?
Thanks.
I thought the PV should energise as normal as well. I am wondering if your pv grid monitoring is on the wrong side of your AIO
Thanks darknite
Will add to the list for installer.
Please elaborate - is your PV being fed into your system as DC or has it gone through an inverter already (as per many FIT systems) and being fed as AC into the Gateway?
Also when you state PV is ‘shut-off’ - how are you monitoring this? Via the App?
Could it be that the PV is being directed to your house consumption (along with the AIO output) rather than being used to charge the AIO?
Morning,
PV passes through a Solis inverter in the loft before entering GE equipment.
When I turn off the main DNO isolator, the separate PV meter turns off and no PV is reported either in the GE app or passing through the PV meter on the Gateway.
How is you Solis inverter configured / wired ?
I have an older model ( 10 year old ) and if my mains power goes off it isolates itself so that no power is fed back into the GRID.
I now have an additional GE inverter + Batteries and if the Mains goes off i just throw the EPS switch. ( but you AIO does that automatically )
Check the logs of the Solis inverter and see what it says happens when the mains power is cut.
AI Overview
A Solis inverter will go offline if it loses power because it is designed to disconnect from the grid when there is a power outage, as this is a safety feature to protect the grid from potential backfeed issues; essentially, it stops producing electricity when the grid power is absent, meaning it goes offline until power is restored.
Aye, I’d expect the Solis inverter to go off line if there wasn’t the AIO & gateway present during a power cut, but wouldn’t the AIO should takeover replicating the Grid supply when in EPS mode and gateway in island mode should prevent any export back to the Grid?
Or am I misinterpreting / misunderstanding the expected behaviour?
You might be right… wouldn’t a simple way be to look at the Solis inverter logs though ?
if when you cut the power the Solis Inverter detects a power loss then you know it’s not wired correctly ?
Aye, but I don’t have access to the logs - Solis data collector wasn’t installed, will see if I can get one from the installers so I can access the inverter.
Go old school… there should be a LCD display on the inverter, check the display, cut the power and see if there is an error
Hey,
Not sure if will help but I read somewhere if your battery is over 80% it might stop all solar generation.
Not sure if you were testing with nearly a full battery.
Thanks
Bob
Definitely one for your installer to look at initially. Hopefully they installed an earth rod, as that’s a pre-requisite for an AIO if you want to continue generating PV.
There have been lots of issues with this in the past, both from the installer side with not installing earth properly / at all, to the Gateway having issues with off-grid mode.
When all working properly, the Gateway effectively tricks the inverter into thinking all is still well with the grid, which is what allows PV generation to continue. If the inverter detects anything is amiss then it will shut itself down until it sees the grid being back online.
Afternoon Captain,
Yes, definitely have an earth spike - well, at least they ran the cable and installed the ducting for it - I’m assuming it’s actually connected in the ground 
Will follow back up with installers.