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What is the process for replacing your inverter and FIT?

  • August 11, 2025
  • 5 replies
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Carbon Cutter*
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What’s the process if any would I need to follow if I get a new inverter and battery storage in relation to my FIT payment, I’m not changing my panels so the solar generation will not change from the original install expectations from that point of view, any advice would be appreciated.

Best answer by BPLightlog

Hi ​@SpeckleD , you need to advise your FIT provider with full details of the changes. There is a central register that is operated by Ofgem and as long as the new system specification doesn’t move you out of the original certification, that should be that. With batteries, you might find that your generation meter will need to be changed so make sure you keep an eye on any final and initial readings which would be needed 

5 replies

Blastoise186
Plan Zero Hero
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  • Blastoise186Plan Zero Hero
  • Plan Zero Hero
  • August 11, 2025

Howdy ​@SpeckleD ,

What’s the reason you were looking to swap out components of your system? If you can answer that for me, I’ll be able to ask a Forum Moderator to check with the right team.

Thanks!

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Carbon Cutter*
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  • SpeckleD
  • Author
  • Carbon Cutter*
  • August 11, 2025

I am going to get a battery storage solution installed that requires a new hybrid inverter, to manage both the batteries and the solar.

BPLightlog
Plan Zero Hero
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  • BPLightlogPlan Zero Hero
  • Plan Zero Hero
  • Solved
  • August 11, 2025

Hi ​@SpeckleD , you need to advise your FIT provider with full details of the changes. There is a central register that is operated by Ofgem and as long as the new system specification doesn’t move you out of the original certification, that should be that. With batteries, you might find that your generation meter will need to be changed so make sure you keep an eye on any final and initial readings which would be needed 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP}
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Ben_OVO
Community Manager
  • Ben_OVO
  • Community Manager
  • August 12, 2025

Morning ​@SpeckleD and welcome to the OVO Forum! 

 

I’ve added the Solar PV badge to your account so that other Forum members recognise which kit you have, and we can add the battery badge as well once you’ve got it installed.

 

Is your FiT / SEG with OVO? If so you can contact the relevant team:

 

Feed in Tariffs (FIT) 
Email: fits@ovoenergy.com
0330 102 7421

Smart Export Guarantee (SEG)

Email: seg@ovoenergy.com
0330 102 7421

 

If your Solar panels have been installed by OVO, you might also consider Battery Boost. You can find out more about this on our website here and in this Forum article:

 

 

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Peter E
Plan Zero Hero
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  • Peter EPlan Zero Hero
  • Plan Zero Hero
  • August 12, 2025

As ​@Blastoise186 said and everything I've seen so far, you can replace like-for-like and then the FIT applies to replacement equipment. This is important for solar capacity, and inverter power. Anything else means the FIT no longer applies.

 

Here's a snapshot answer for connecting batteries but there seems to be more than one solution.

 

 

Peter

 

Reducing my yearly fossil fuel usage with an EV (-900 litres petrol), A2AHP (-8,500 kWh gas) and Timed Immersion heater (-1,500 kWh gas)
Ben_OVO
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