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Since switching to three phase my consumption has rocketed to 25,000KWH per annum, despite no significant additional load.

adam spearing

We moved to three phase 3.5 years ago an anticipation of electric cars (which we don't have). 

Since then We have been consuming around 25,000KWH pa according to the meter. 

I've had a second meter fitted and it's validated these numbers. 

When I switch all the RCDs off it stops, so clearly it's my side of the RCDs. 

The house is around 10 years old with gas heating and gas cooking. We have low energy light bulbs. 

The overnight consumption seems to show we're using 4+KWH per hour when we're asleep. 

Load balancing was mentioned and I vaguely remember it from my degree but I don't believe that's it. 

Large donation to charity if you can help me work this one out

thanks in advance 

Adam

Parents
  • 0

    Hi All, we did the clamp metering and found two bad loads (3kw heater with broken thermostat and hot tub problem). 

    These have reduced the load quite a bit - however we're still using 15kwh annual equivalent and the overnight load is still super high

    One suggestion is it's how the power company charge for 3 phase and they might be billing 3 x the highest load - does anyone have a view on this? The billing department seemed surprised we only had one reading for KWH on the meter ... 

    Here's what it looks like now 

Reply
  • 0

    Hi All, we did the clamp metering and found two bad loads (3kw heater with broken thermostat and hot tub problem). 

    These have reduced the load quite a bit - however we're still using 15kwh annual equivalent and the overnight load is still super high

    One suggestion is it's how the power company charge for 3 phase and they might be billing 3 x the highest load - does anyone have a view on this? The billing department seemed surprised we only had one reading for KWH on the meter ... 

    Here's what it looks like now 

Children
  • 0 in reply to adam spearing

    I am not quite sure what I am looking at here. The date is obvious. I assume that the second column is the time and the third is the meter reading. The fourth column appears to be the consumption since the last reading and the fifth column appears to be the number of hours since, with the 6th column showing the average consumption.

    The night of 2/3 Feb drew an average of 1.33 kW, which is a lot unless there are loads of electric blankets. Then the daytime consumption on 5 Feb was 2 kW, falling back to 1.39 kW that night, and similar again the following day. So what is being switched on and off?

    I agree with AdrianWint - 3-phase meters measure why you consume. Taking the highest phase an multiplying by 3 is not only a complete myth, but would probably be unlawful.

    Incidentally, the other day I found that somebody had left a heated towel rail on in the guest bathroom. I hope that it wasn't since we had guests in the first half of December!

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