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GivEnergy inverter tripping due to over-voltage?

 
Electricity, Tariffs, Monitoring, Electrics & Providers
Last Post by Tim441 1 hour ago
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 Tim441
(@tim441)
Honorable Member Contributor
Joined: 4 years ago
Posts: 401
Topic starter 03/06/2026 3:20 pm   [#3038]

My inverter keeps 'tripping/resetting' - green light intermittently flashing. PV solar drops to nothing and then starts again .... climbing to 4.5kWh+ production for a few minutes with steady green light before again resetting with green flashing light.
- Installed 2020
- 5kw Hybrid GivEnergy inverter Gen1
- 3 x 8.2kw batteries Gen1

Example 30th Apr:
- Was working fine until about 1pm.
- Probably reset every 3 or 4 mins so solar production highly impacted.
- Batteries were full
- I disconnected EV to prevent any IOG control.
This started around 12.30pm that day and was particularly bad for 2 hours. After that the reset was less frequent but still happened.

I have been using WonderWatt with IOG for more than a year. With no noticeable issues.
No recent changes but still wondered if somehow GivEnergy/IOG/WonderWatt are having conflict?

I've continued to investigate... with help ChatGPT as well.
It seems the most likely reason is Grid overvoltage
Probably happens most with:
- high exports
- sunny day
- Full battery
But not exclusively. Also happening today when production low (cloudy) and battery not full

I will try and keep some capacity free in my battery as one test.

Afaik Gen1 Hy5.0 has a max voltage of 253v before tripping? (DNO 230v +10%).
My logs on first review show regular 256 -260v
I contacted DNO to see if they can be persuaded to show some interest.
Just wondered if any other suggestions to help diagnose or cure?

EDIT: Sent info to DNO. Incredibly engineer sent within 3 hours.
- ran initial tests
- fitted a voltage monitor to run for 3 days with solar panels off
- he is also arranging for line & pole checks for connections as well as potential swapping of phases (apparently one phase tends to run higher than other)

amazing level of interest & speed of service!

He will remove monitor after 1 week and I will update with news

Edit2

I believe this problem may have been happening intermittently for a very long time. But only recently paid attention to it!


This topic was modified 1 hour ago by Mars
This topic was modified 1 hour ago 2 times by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw 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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