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Which technologies do you have? Which tariff are you on? Multiple answers, please Poll is created on Dec 09, 2025

  
  
  
  
  
  
  
  
  
  
  
  

Poll for Time of Use, tariffs, technology

 
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Electricity, Tariffs, Monitoring & Providers
Last Post by Toodles 1 month ago
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 Tim441
(@tim441)
Noble Member Contributor
Joined: 3 years ago
Posts: 386
Topic starter 09/12/2025 1:14 pm  

It might be interesting to see which technologies are used and which tariff? Or maybe there are so many variables that it's not possible to get many takeaways without deeper analysis? 

I've listed Octopus tariffs as those are the ones I'm familiar with - if possible answer with your equivalent.

With 12 poll answers i may not have captured everything but hope the majority are included.

THE POLL ALLOWS YOU TO VOTE ON MULTIPLE OPTIONS. SELECT EVERYTHING THAT'S RELEVANT TO YOU!


This topic was modified 1 month ago by Mars

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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Poll tariffs technology
 Sheriff Fatman
(@sheriff-fatman)
Reputable Member Member
Joined: 9 months ago
Posts: 180
09/12/2025 2:45 pm  

Messed that up straight away as saw the 'multiple answers please' just after voting for my tariff.

Can't amend it now, by the looks of things, and can't re-vote.


130m2 4 bed detached house in West Yorkshire
10kW Mitsubishi Ecodan R290 Heat Pump - Installed June 2025
6.3kWp PV, 5kW Sunsynk Inverter, 3 x 5.3kWh Sunsynk Batteries
MyEnergi Zappi Charger for 1 EV (Ioniq5) and 1 PHEV (Outlander)
User of Havenwise (Full control Jun-Dec 2025, DHW only from early Dec)
Subscriber to MelPump App data via CN105 Dongle Kit


   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
09/12/2025 9:23 pm  

Tarrifs seem limited to Octopus.  Im with EON so voted for nearest equivalent.


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1379
10/12/2025 10:23 am  

Bear in mind that for anyone with solar PV export capability (me, for a start), there will be two tariffs. That's why I ticked both fixed and agile. No idea what that'll do for your ability to get any kind of picture from the results.


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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 Tim441
(@tim441)
Noble Member Contributor
Joined: 3 years ago
Posts: 386
Topic starter 10/12/2025 10:37 am  

@majordennisbloodnok thanks. Unfortunately  i can't update to clarify. My intention was import tariffs only. But we'll see if anything meaningful is discovered from the poll!

I too have Fixed export as well as Intelligent Go for imports


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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 JohnnyB
(@johnnyb)
Estimable Member Member
Joined: 1 year ago
Posts: 62
12/12/2025 3:00 am  

I ticked Intelligent and Agile, I'm on Agile at the moment but will switch to Eon equivalent once my inverter is fitted and the batteries connected. That was supposed to be tomorrow but apparently it hasn't arrived yet.



   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
12/12/2025 12:34 pm  

Posted by: @johnnyb
↑

but will switch to Eon equivalent

Watch EON.  I am currently with them but the renewal terms for my import and export tariffs, if I were to accept them, would result in a net cost increase of 57%.  I guess I always knew that some aspects of the tariffs they offered in 2025 couldn't last, so was on the look out all along.  Back to Octopus for 2026!


This post was modified 1 month ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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 Papahuhu
(@papahuhu)
Reputable Member Member
Joined: 5 months ago
Posts: 120
12/12/2025 1:55 pm  

@majordennisbloodnok 

me too. I switch from favourable export to favourable import in October. It makes about two thousand pounds a year difference in doing so if you have a large export and in my case allows a nett zero annual power cost. But for how long….



   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
12/12/2025 2:06 pm  

Posted by: @papahuhu
↑

@majordennisbloodnok 

me too. I switch from favourable export to favourable import in October. It makes about two thousand pounds a year difference in doing so if you have a large export and in my case allows a nett zero annual power cost. But for how long….

Interesting you do a mid year switch.  Van I ask between which tarrifs/providers.  Do you switch back in March/April?

 


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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 Papahuhu
(@papahuhu)
Reputable Member Member
Joined: 5 months ago
Posts: 120
12/12/2025 2:29 pm  

@jamespa 1st March onto intelligent flux, back to cosy 1st Oct.

IOFlux is amazingly profitable if you have large array and compatible battery, but no EV. I’m around £2.5k in credit by October which easily takes me through winter power costs and covers heat pump servicing and my water bills too. 
I’m looking forward to Tesla’s VPP power offering, it’s going to have to be better than than IOF or IOG or they won’t get any market share.n



   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 3969
12/12/2025 3:01 pm  

Posted by: @papahuhu
↑

@jamespa 1st March onto intelligent flux, back to cosy 1st Oct.

IOFlux is amazingly profitable if you have large array and compatible battery, but no EV. I’m around £2.5k in credit by October which easily takes me through winter power costs and covers heat pump servicing and my water bills too. 
I’m looking forward to Tesla’s VPP power offering, it’s going to have to be better than than IOF or IOG or they won’t get any market share.n

Thanks for that, yes I can see that with Import price = export price it can be a good deal in Summer, too good to be sustainable surely.

However like all these things you have to go with what is currently available. 

I switch back to octopus on 5th Jan and of course thats to the variable rate tarrif intelligent.  Octopus Go was my target tarrif, and perhaps still is (I have an EV but no charger so cant access Intelligent Go, I dont currently have a battery because I havent yet been able to get the business case to work)  I now have a couple of weeks to do yet more calculations whilst enjoying Christmas!

 


This post was modified 1 month ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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 Papahuhu
(@papahuhu)
Reputable Member Member
Joined: 5 months ago
Posts: 120
12/12/2025 3:14 pm  

@jamespa 

With an EV IOF doesn’t work, so no meaning to pay a premium to get a smart battery.

LFP battery wholesale costs are plummeting at the moment, that will feed into retail soon, you may be better waiting until they flatline. That will also give time to see if sodium will replace lithium too. 



   
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