Fuse Energy & OFTM Reviews please ⚡️

Foxy16

I think they are overcharging me on the CV as well, been checking it regularly on National Gas and it has ranged between 38.00 & 38.80, for the South West. Fuse CV on my bill is 39.7. Same previous months.

I am really getting cheesed off now with previous bills being regularly amended, my Jan. bill has got a correction for Oct, Nov & Dec. bills. But no new bills on my account showing where the correction has been made, in their favour I might add.

bagand96

https://forums.moneysavingexpert.com/discussion/comment/81869597#Comment_81869597

So using the NG data average CV for my region in January is 39.0 and not the 39.8 that Fuse show on the bill. Based on meter reads of 121 m3 used:

• CV displayed on bill - 39.8 = 1368 kWh
• CV from NG data - 39.0 = 1340 kWh
• Fuse have billed 1333 kWh (which would equate to a CV of 38.797)

It could be that they have billed on the correct CV and as you say the one shown on the bill is nonsense, then the missing 7kWh could be explained by rounding?

Foxy16

Thinking more on this CV, which I am not very familiar with, please could someone check the following for me, (if Fuse are overcharging I will be contacting them). I am in Bristol, which is South West and as I stated earlier CV has ranged from 38.0 - 38.8. Figures from the bill I have just received, does not make sense to me:

197 m3 x 39.7 MJ / m3 (calorific value) x 1.02264 (correction factor) ÷ 3.6 MJ / kWh (conversion factor) =

2167.323 kWh

Thank you

molerat

That calculates as a CV of 38.729. Definitely not the truncated 38.7 they should have used so overcharging you around 1.6 kWh.

gpman

https://forums.moneysavingexpert.com/discussion/comment/81871151#Comment_81871151

Your average CV for Jan 2026 (rounded up to 3dp as is the apparent Fuse methodology) was 38.784 using latest data
As the CV data for 31-Jan-2026 was entered 3 times, the latest not being until 16:00h on 02-Feb-2026, the average could be 38.775 or 38.752, depending on when Fuse pulled the data.

In any event, you were undercharged on the basis of CV to 3dp (rounded up) being used.

Update: I see the CV for 30-Jan was also last updated @ 16 :00h on 02-Feb-2026, so maybe the average CV would be 38.723 (ignoring the late updates)
That would be an overcharge of about 0.33kWh, so about 2p on what is presumably a £110+ gas bill. (but then presumably you will get a bill correction later?)

If Fuse were to follow the Ofgem rules, (i.e. truncate the average to 1dp), then you have been overcharged and the issue of which data set was used does not affect the correct average CV of 38.7
The overcharge is about 1.63kWh, so about 8-9p dependant of the price per kWh you are charged at.

What you need to ask yourself is not only are you prepared to quibble over these comparatively small financial amounts, but are you prepared to potentially expose and open up the entire can of worms that is the Fuse billing system, where some errors you win from and other areas you lose out from.

brewerdave

I've just given up with Fuse - I think they have an innumerate 5 year old working out the gas bill - my own spreadsheet agrees approximately with the amount charged and no monthly corrections have ever appeared on subsequent bills - If I vary the CV downwards from their bill value, I obviously get different (lower) £ amounts but Fuse are still charging me less every month than my spreadsheet calculates !

gpman

https://forums.moneysavingexpert.com/discussion/comment/81871496#Comment_81871496

Exactly, which is why I'm generally adopting a 'Laissez-faire' or 'Let sleeping dogs lie' approach

I do have a complaint open with Fuse because I was riled up seeing the totally unexplained single line entries for the first time apparently relating to previous months calculations. I'm still awaiting a full explanation, and I had threatened to recall the payment due to be taken tomorrow without it, but now I've calmed down, that might be a bit of an over-reaction based upon the minimal amounts involved (part of the reason I became riled originally). I know it may concentrate their focus if I did make the recall tomorrow, but I am conscious as to how that may look later if I eventually need to escalate matters to the EO to get the full explanation.

molerat

Have you checked the bill for the relevant month ? Fuse do not issue or store bills as such, each time you ask for a bill it generates a new one based on the data held for that period at the time of generation.

gpman

https://forums.moneysavingexpert.com/discussion/comment/81872430#Comment_81872430

Thanks for that pointer.

I knew past months bills were on my account, but I didn't re-look at them as there was no immediate indication that they had been changed.

I've now downloaded the new ones. Good job I have a copy of the original ones to compare against.

So my Jan bill indicated 2 bill corrections, one for Oct (a debit) the other for Nov.(a credit)

Looking at the revised November Bill (you will recall I mentioned I did not know where Fuse got the ave. CV from that they used). So the new bill indicates an increased CV (which should result in a debit I was credited), but a reduced usage in kWh. That's because the new CV shown is rounded to 1 dp. If I reverse calculate the CV used for calculation, it is less than the original, but still is not correct to the latest data from National Grid.

October bill. Bu**er! They've corrected one of the errors in my favour relating to the difference of 2 meter readings. Again, I need to ignore the quoted CV as that is rounded to 1 dp. so lower than the original which itself would have created a credit I got debited. So reverse calculation of the CV gives me the higher CV rounded up to 3dp, But you will recall it was correct originally! (on the basis is was rounded up to 3dp), so now its wrong.

I also checked the calculation with the original, incorrect usage in m3, (incorrect difference in meter readings) but that just makes the CV even more incorrect, Hence I think they've corrected the usage value, but now introduced an incorrect CV.

I understand Fuse should be using CV to 1dp truncated, but I'm not exercised by that error at the moment, as if I throw that into the mix at this stage it will will make getting to the bottom of their numbers even more complicated.

Edit: I may have given Fuse too much credit in assuming they fixed the arithmetic difference error between the 2 meter readings. I've just re-downloaded the September bill, (now in the nice new format) and it appears to have corrected the arithmetic error in the m3, but the result in kWh is unchanged from the original version.

So all they have done in the new format is rounded the m3 value to an integer for display purposes, but still used the incorrect fractional value for calculation purposes.

On that basis, it would be logical to assume they have done the same to October's bill. Therefore, they have now used a revised CV that is even more incorrect than I originally assumed. Remember, it was actually correct (to 3dp) on the original Oct bill.

brewerdave

https://forums.moneysavingexpert.com/discussion/comment/81872430#Comment_81872430

I've just looked at some of my older bills for last year - haven't rechecked the calculations or compared with the "originals" BUT there are still NO corrections to the £ /p final bill amounts.