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GivEnergy inverter tripping due to over-voltage?

 
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Electricity, Tariffs, Monitoring, Electrics & Providers
Last Post by Tim441 11 hours ago
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Transparent
 Transparent
(@transparent)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 3285
25/06/2026 10:34 am  

For others following this discussion, there's stuff happening behind the scenes which isn't being reported here.

A device which causes persistent over-voltage can't be left connected to the grid, especially when it's been proven to 'take down' other inverters, such as Tim's GivEnergy inverter. The situation is being looked into at a high level within NESO.

This is a typical scenario where the energy sector wants to engage with us ordinary consumers. They need our local knowledge, and accurate time-frames for when symptoms and faults manifested themselves.

Let's remember that the lower levels of the grid are not monitored.

Once the Primary substation feeds 11kV out to the scores of local substations which it supplies, there are no more voltage, current and frequency monitors which routinely record or send back data. Very few of the 550,000 local substations have ever had monitors installed alongside them.

Nor are Energy Suppliers required to retrieve data from Smart Meters which might alert the DNO of parameters which fall outside the statutory specifications.


Save energy... recycle electrons!


   
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 Tim441
(@tim441)
Honorable Member Contributor
Joined: 4 years ago
Posts: 421
Topic starter 25/06/2026 10:39 am  

@transparent I very much appreciated your input & followup on my specific issue as well as potential impacts elsewhere. Extremely interesting learning curve!


Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8.7kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
ReplyQuote
 Tim441
(@tim441)
Honorable Member Contributor
Joined: 4 years ago
Posts: 421
Topic starter 26/06/2026 12:47 pm  
A summary of this history and discussion for those searching in future 
 
Overvoltage is a problem for the DNO because they have a legal and engineering responsibility to supply electricity within specified voltage limits and ensure customers' equipment operates safely and reliably.
 
Basics
    • Grid supply is 230v 
    • with fluctuation between 216.2 to 253v permitted by regulations 
  • e.g. high PV solar in summer may push it up
  • e.g. high usage in winter may push it down
My supply has been exceeding 253v causing some problems inc inverter trips.
SSE Networks (DNO for our area) have been surprisingly interested and proactive
 
SSEN
  • Used a data logger for a week in early June to check. Unfortunately that week was fairly grey with lower solar. 
  • So no excess events - even though close to max at times
  • In the previous 2 weeks to that I had recorded overvoltage on 10 days. On one day 59 events!
  • So SSEN nevertheless agreed it seems high
Options
  • They can tweak the voltage down at our local transformer. BUT that might cause undervoltage in winter.. so not keen to do that at first stage
    • Supply at poles etc is 3 phase with most houses taking one phase. They can switch phases to a single house... to see if that helps
  • It can indicate problems on the local network
In my case
  • My voltage was regularly hitting 254-255v on high solar days prior to SSEN investigations
  • causing solar inverter to trip and potential for other issues
  • so they switched my phases
  • In past 2 weeks since phase change my max voltage has had no events over 253v
 

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8.7kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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