Depending how the metering has been configured (or bodged by EDF, as their name is on the meter), then
Rate 1 will be the regular peak time day rate.
Rate 2 will be your Economy 10 off peak rate.
Rate 3 should be an off-peak heating rate costing the same as your Rate 2, but only physically powering the lower immersion heater during that off peak time.
The 'boost' immersion should work at any time of the day or night but during on peak (or day hours) it will be racking up on your Rate 1 numbers, and at night will be racking up on Rate 2.
For billing porpoises, Rate 1 is your normal day rate. Your Night rate will be a combination of Rate 2 and Rate 3. Rate 2 measuring any other electricity you use in the flat at off peak times, and Rate 3 measuring purely what is used by the immersion heater.
I'd expect a billing calculation to be based on 1 for your peak, and (2+3) for your off-peak rate. The older complex tariffs for Heatsave or FlexiHeat had three separate rates, and two separate standing charges. It's a nightmare for billing because it has to be calculated as
(Current Rate 2 Reading - Last Rate 2 Reading) = Rate 2 Units used
(Current Rate 3 Reading - Last Rate 3 Reading) = Rate 3 Units Used
Total off-peak units used =(Rate 2 Used + Rate 3 Used)
And that's why a lot of companies struggle with it - they aren't programmed to to the calculations!!
Rate 1 will be the regular peak time day rate.
Rate 2 will be your Economy 10 off peak rate.
Rate 3 should be an off-peak heating rate costing the same as your Rate 2, but only physically powering the lower immersion heater during that off peak time.
The 'boost' immersion should work at any time of the day or night but during on peak (or day hours) it will be racking up on your Rate 1 numbers, and at night will be racking up on Rate 2.
For billing porpoises, Rate 1 is your normal day rate. Your Night rate will be a combination of Rate 2 and Rate 3. Rate 2 measuring any other electricity you use in the flat at off peak times, and Rate 3 measuring purely what is used by the immersion heater.
I'd expect a billing calculation to be based on 1 for your peak, and (2+3) for your off-peak rate. The older complex tariffs for Heatsave or FlexiHeat had three separate rates, and two separate standing charges. It's a nightmare for billing because it has to be calculated as
(Current Rate 2 Reading - Last Rate 2 Reading) = Rate 2 Units used
(Current Rate 3 Reading - Last Rate 3 Reading) = Rate 3 Units Used
Total off-peak units used =(Rate 2 Used + Rate 3 Used)
And that's why a lot of companies struggle with it - they aren't programmed to to the calculations!!
Don't shoot me, I'm only the piano player. I DON'T work for or on behalf of EON.Next, but am willing to try and help if I can. Not on mains gas, mobile network or mains drainage. House heated almost entirely by baby dragons.
