Immersion heater is definitely not on at the switch. I've checked that so many times now that the wife is starting to worry that I have a fancy woman hiding in the airing cupboard.
Although it's a new boiler from a few months back - so I'm now wondering if there's a setup issue.
Anyway - I've now ordered an individual appliance meter (10 quid) and a general usage meter (30 quid)* which will be able to show me my overall utilization at the meter (expecting it to confirm that I am indeed burning 35-40 kwh per day!) and then I can go appliance by appliance and work out what is using what.
My plan is:
- connect overall usage meter to the mains connection to the electric meter (apparently it clips onto the meter input wire)
- let it settle to show me the current usage
- switch off all lighting to see what that is drawing
- switch off all discretionary stuff (tvs, kettle, washing machine, tumble dryer, laptops, chargers, sky boxes etc) to see what they are drawing as a whole
- check draw of what is left (fridge/freezer/cooker) - make sure that looks sensible
- incrementally switch on each discretionary appliance with the individual appliance meter connected to check that what it says it is drawing translates to the overall total
Both of the usage meters I have purchased show both the current draw and also will show the 24 hour usage prediction (and an annual one!) so I should be able to compare like with like.
I'm hoping that I can pinpoint a problem (maybe immersion heater is wired wrong or similar) - but I suspect that what I will see is that we are just (a) tragically bad at controlling our usage, and (b) some of our appliances are a lot less efficient than we thought (current suspects will be the tumble dryer, the computers and phone chargers and potentially the dozens of spot lights that we have had put in over the recent past....
Should receive monitors from Amazon in next 2-3 days so quite looking forward to a bit of detective work.
Oh - and BG have told me that my "adjustment" bill that is coming in the post based on my most recent reading will be approximately £1,300 and to expect a wild upward revision of my £65 per month DD....
*BG are sending me a free usage meter in the post - but it will take 28 days to arrive