As a minor point, although I have often seen that stated/suggested, my E7 'cheap rate' has always (for 30+ years) started at 00:30 GMT (hence 01:30 BST in the summer), and the fact that those times are now printed on the case of my E.ON meter, I can but assume that those timings are fairly common.
Using the lighting-down times provided by Cambridge University Boat Club (probably as good a metric as any for where you live), the difference between midnight and those totals about 1945 hours.
Yes, I presume that must be true, since I heard/read a lot about timings appreciably different from mine. However, as I said, the fact that the times are now printed on E.ON meters presumably means that it is universal for them.
You mean it's in two bits , with a 1 hour gap in the middle? If so, I can see that could be pretty inconvenient at times (and nor does it make a lot of sense, because I would not expect high demand between 01:30 and 02:30!).
That obviously was not practical in the days of electromechanical time switches, but I don't really understand why they don't do it with electronic meters - one can but imagine that variations in demand (hence the periods of low demand) are dictated primarily by current 'clock time', not GMT.
Well, I still can't make any sense of it. The total amount of electricity used, about 19.4 kWh/day is appreciably lower than many would see, particularly in Winter, but, if you didn't have storage heating, for 89% (a bit higher now we have the accurate figures) of your total usage to be at night rate really defies belief - and I'm a little surprised that Scottish Power didn't question it. What on earth were you using through the night which used nearly all of your total electricity consumption?
That's far more like what I would have expected to see for a house without storage heaters.
Indeed. As we have both said, if mis-recording is discounted, about the only credible explanation would seem to be that the timing of the dual-tariff metering in the OP's previous house was totally up the creek. That's why I suggested that he maybe got used to inappropriately low electricity bills in his previous house, and is therefore now a bit shocked to be being billed on the basis of a much more credible day/night split in his new house!
My comments took on board the fact that the OP had an immersion (not sure why, with a combi as well) which is fired up for two periods per day. Depending on how long those periods are, how much hot water is used and how well insulated the cylinder is, that could easily account for several kWh/day - which is why I suggested that (on the basis) 19-22 kWh/day total was probably a bit on the low side.
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