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What size are my meter tails? Getting a 100 amp fuse, are the tails 25mm or 16mm for EV charger?

  • June 16, 2019
  • 4 replies
  • 5326 views
A
New Member**

Hi all,

I had an OVO SmartMeter installed in 2017.
We've just bought an electric car (a PHEV - a second hand Mitsubishi Outlander).
To fit a charging point in our driveway I've engaged ChargedEV, who have forwarded the enquiry to UK Power networks to install a 100 amp fuse.
In advance of that I need to identify if our meter tails and consumer unit tails are 25mm (rather than 16mm).
As I understand it, OVO 'own' the meter tails.
I (or at least a qualified electrician) 'own' the consumer unit tails.
UK Power networks 'own' that fuse.

How do I work out what size the Ovo meter tails they are?
(And any advice on the same for the consumer unit connection welcome!)

Many thanks, Neil
 

Best answer by Amy_OVO

Updated on 04/11/25 by Abby_OVO

 

Great to hear about your new Electric Vehicle (EV)! In case you haven’t already seen it we’ve got a great community discussion on EV purchasing here.


Important question to ask now you’re looking to install an EV charging point. Happy to confirm that if you’ve had a smart meter installed by OVO the meter tails would be upgraded to 25mm as standard, even if you had 16mm prior to your smart meter being installed.

 

If you’ve got a traditional meter and are looking to get an EV charger installed, we’d advise taking this opportunity to get a smart meter installed to make sure your meter tails will fit the bill. There’s other great smart meter benefits too!

 

OVO member but not got a smart meter yet? - Book today!

 

Interested but not yet an OVO member? - Check out our plans!

4 replies

Amy_OVO
Retired Moderator
  • Amy_OVO
  • Retired Moderator
  • Answer
  • June 19, 2019

Updated on 04/11/25 by Abby_OVO

 

Great to hear about your new Electric Vehicle (EV)! In case you haven’t already seen it we’ve got a great community discussion on EV purchasing here.


Important question to ask now you’re looking to install an EV charging point. Happy to confirm that if you’ve had a smart meter installed by OVO the meter tails would be upgraded to 25mm as standard, even if you had 16mm prior to your smart meter being installed.

 

If you’ve got a traditional meter and are looking to get an EV charger installed, we’d advise taking this opportunity to get a smart meter installed to make sure your meter tails will fit the bill. There’s other great smart meter benefits too!

 

OVO member but not got a smart meter yet? - Book today!

 

Interested but not yet an OVO member? - Check out our plans!

OVO-Joyed to help!
Abby_OVO
A
New Member**
  • Apples
  • Author
  • New Member**
  • June 19, 2019
Wonderful - thank you Amy!
Eva_OVO
E
New Member*
  • elizad
  • New Member*
  • October 22, 2019

While doing some work to my consumer unit, the electrician has advised that: ‘the tails from the electricity meter to the henley blocks’ are around 6mm & should be 16mm - 25mm’. a) is this safe? b) can you update? 

Amy_OVO
Retired Moderator
  • Amy_OVO
  • Retired Moderator
  • October 25, 2019

I’ve moved your post here, @elizad, please see my best answer, I would recommend reaching out to our team for further info regarding updating the meter tails. 

You can send us a message on Facebook, Twitter , our Help Centre has online chat, or give them a call. You can reach our Customer Care team 9-5 Monday-Friday on 0330 303 5063. 

 

Hope this helps! 

OVO-Joyed to help!
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