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How can I arrange for an extra electricity supply at my property?

  • 3 April 2018
  • 6 replies
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Please could someone help me as to how I should go about arranging for a new supply to be connected for granny annexe that we are currently having built ?

Our present supply is 100 amp rated but we have an induction hob which will overload the present supply if we simply add the annexe's needs onto our existing supply.

The electrician has recommended we either get a 3-phase supply or ask our supplier for an additional meter - but there doesn't seem to be anything on the ovo website about this.
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Best answer by Transparent 4 April 2018, 14:52

Hi @Jim C,

Well, considering this is your first post on the OVO Forum, you've chosen a good one! I'm sure there are several of us who can help. I don't know the complete answer, so I'll comment on the technical bits and hope that others can respond to the rest. Your electricity supply, including the Main Fuse and the Meter, are the property of the Distributed Network Operator (DNO) for your geographical region. You need to start communicating with the one for your area about having a new/upgraded connection. You can download a PDF to tell you how to go about this from here. 3-phase has a number of advantages, especially if you want to feed solar/wind power back onto the National Grid. You will be allowed to connect up to 3x 16Amp renewable-energy generators, which could be very valuable! And if you ever buy an electric vehicle, you can have a high-speed charger port. However, I don't know of any Domestic Energy Supplier who could fit a 3-phase Smart Meter, and we will soon all need one. In your case this probably isn't a problem.

Your electrician could divide the phases
  • Main house
  • Annexe
  • Spare
The first two need their own (Smart) Meter. Thus you can have separate bills for the Granny Annexe if you wanted. The spare phase should still be terminated to a separate 100A "Switch Disconnector" and simply left there in case you later require it. The presence of the Switch means that an electrician won't have to recall your DNO to site if something is later connected to this phase. Have a read of this thread where an OVO Forum Moderator discusses 3-phase with another customer. Ask again here if you need further clarifications.

**Updated 16/07/2019**
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6 replies

Userlevel 7
Badge +3
Hi @Jim C,

Well, considering this is your first post on the OVO Forum, you've chosen a good one! I'm sure there are several of us who can help. I don't know the complete answer, so I'll comment on the technical bits and hope that others can respond to the rest. Your electricity supply, including the Main Fuse and the Meter, are the property of the Distributed Network Operator (DNO) for your geographical region. You need to start communicating with the one for your area about having a new/upgraded connection. You can download a PDF to tell you how to go about this from here. 3-phase has a number of advantages, especially if you want to feed solar/wind power back onto the National Grid. You will be allowed to connect up to 3x 16Amp renewable-energy generators, which could be very valuable! And if you ever buy an electric vehicle, you can have a high-speed charger port. However, I don't know of any Domestic Energy Supplier who could fit a 3-phase Smart Meter, and we will soon all need one. In your case this probably isn't a problem.

Your electrician could divide the phases
  • Main house
  • Annexe
  • Spare
The first two need their own (Smart) Meter. Thus you can have separate bills for the Granny Annexe if you wanted. The spare phase should still be terminated to a separate 100A "Switch Disconnector" and simply left there in case you later require it. The presence of the Switch means that an electrician won't have to recall your DNO to site if something is later connected to this phase. Have a read of this thread where an OVO Forum Moderator discusses 3-phase with another customer. Ask again here if you need further clarifications.

**Updated 16/07/2019**
Userlevel 6
Badge +4
Hi @Jim C,

Hope you got the information you need. I've modified the title of your topic and added some tags to make it more 'searchable' so that other users with a similar question can find it!

Cheers,
Nancy
We are buying a property with two separate meters for the main house and the Granny Flat Because the Granny Flat doesn't have its own address as such How do I register an account with OVO. I've set up my house move for the main house but not sure how to action for the granny flat. Could do with asking someone but struggling to see a number I can use.
Userlevel 7
Badge +2
We are buying a property with two separate meters for the main house and the Granny Flat Because the Granny Flat doesn't have its own address as such How do I register an account with OVO. I've set up my house move for the main house but not sure how to action for the granny flat. Could do with asking someone but struggling to see a number I can use.

Thanks for posting @Crolly

I know that OVO can't create a new supply (with its own supply number and meter) - this is still the prerogative of the big 6 - reach out to them, and when sorted, switch the new supply to us here!

Have a look at Transparent's answer above for more info.
Userlevel 7
Badge +3
I don't think it's a new supply that's needed @Tim_OVO

If there's already a separate meter in the Granny Flat, then surely @Crolly just needs an OVO account with two electricity meters billed on it.
Userlevel 7
Badge +2
If there's already a separate meter in the Granny Flat, then surely @Crolly just needs an OVO account with two electricity meters billed on it.

Ahh yes I think you're right, @Transparent - if the meter is already in place, it will have a supply number so we can add it to your OVO account.

Call us and provide the address: 0330 303 5063. The agent will find the supply number of that meter and we'll apply to take it over. ETA 3 weeks!

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