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Isolating the system for a planned power cut

 
Solar Photovoltaic (PV)
Last Post by AgentGeorge 1 hour ago
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 TRBob
(@trbob)
Estimable Member Member
Joined: 3 years ago
Posts: 50
Topic starter 20/08/2025 2:07 pm  

There is an upcoming planned power cut, see the attached letter that I got from NPG. It will be for about 28 hours whilst they do some work to our local network and we will be put on a generator.

It says to isolate generation equipment (a heat pump is an electrical generator?!?) from the mains supply, but I'm pretty sure that my inverter will do this anyway when it loses mains power. Plus my PV isolators will not physically close when under load, I can only turn them off at night. 

Would turning the trip off in the consumer unit be enough?

 

DNO

Mitsubishi Ecodan 8.5kWh
4.4kW Solar PV
5.2 kWh Battery Storage
1983 build, 300mm loft insulation, cavity wall insulation (beads)


   
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 AgentGeorge
(@agentgeorge)
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Joined: 6 months ago
Posts: 23
20/08/2025 2:18 pm  

Thats how my PV works, it says on the CU to isolate the array in the loft if doing any work on the array, or Id guess doing that at night would be safe 🙂


   
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