Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Sustainable Sidetra...
Electricity, Tariff...
Can DNO change a G9...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Can DNO change a G99 export allowance once approved?

 
Electricity, Tariffs, Monitoring, Electrics & Providers
Last Post by AndrewJ 55 minutes ago
1 Posts
1 Users
0 Reactions
9 Views
RSS
 AndrewJ
(@andrewj)
Reputable Member Member
Joined: 1 year ago
Posts: 221
Topic starter 07/07/2026 1:30 pm   [#3088]

I have a Solar/battery system with an approved G99 export limit of 3.68kW.  I know that would/could be covered by a G98 but the installer and I were hoping for a lot more given the 10kW of panels installed.  I experience an issue during summer where the export causes my voltage to spike over 254V and causes a PE fault with my Hypervolt charger: essentially I cannot charge my car at home during the day in summer.  The DNO did come out and put a voltage meter on the supply and agreed it was spiking over the limit.  This might normally be resolved by adjusting the transformer tap to reduce the voltage to the house but unfortunately the transformer is a fair distance away from the house and making changes would potentially negatively impact other households in the area so they can't do that.  I did get a follow up call to say they would change the cable to my house to reduce the resistance and hopefully resolve the problem that way; they also said there is no timetable for the work but I shouldn't expect it to be done any time soon.

That was last September and I've heard nothing since.  Not charging at home during the day isn't really an issue and neither is the G99 limit as I can mostly manage clipping to keep it to a minimum.  If I was to contact the DNO to find out what was happening, could they use it as a prompt to revisit the G99 limit and reduce it further?  In some respects that also would resolve the problem if it was reduced to zero but would be a serious blow as even that small amount has allowed me to achieve a £0 energy bill in the last year.  

On a related note, is it possible to ask the DNO to relook at the G99 and increase the export allowance, again without them saying no and also reducing the current allowance?  

Basically, I don't want to rock the boat in respect to my export but it would be good to get the issue with the charger/supply cable resolved.


This topic was modified 47 minutes ago by AndrewJ

   
Quote
Topic Tags
DNO Export
Forum Jump:
  Previous Topic
Topic Tags:  DNO Export (1) ,

Currently viewing this topic 2 users ( ian33a, Majordennisbloodnok ) and 2 guests.

Recently viewed by users: AndrewJ 47 minutes ago.

Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO