3-phase E7 meter on single phase supply?

statter:

Has  the withdrawal of this old arrangement been triggered by a request from you or have E.on done this independently?  If the former you could press them hard to retain the existing setup as the afternoon charge will help maintain temperatures.


 

E.ON have been pestering me for a long time to discuss moving tariifs which I ignored but recently told me that my 'Heatwise' 10-hour tariff was being withdrawn and unless I discussed it with them I would move onto a single rate more expensive tariff so I agreed to move to E7

I had been planning to have the latest Dimplex heaters, either XLE or Quantum Lot 20 compliant heaters, and after chatting to Dimplex tech dept it was their opinion that they would work best on E7. A friend of mine (on E7 tariff) has just had his really old heaters replaced with XLE and he's really pleased as they are still giving out heat when he goes to bed particularly as he's retired and at home all day.

His old storage heaters would have probably worked better on the E10 tariff because as you say, the afternoon and evening boost would be beneficial if they had given out all their heat by late afternoon.

Another reason for moving to E7 is that there is more opportunity to move supplier for a better deal as not many suppiers offer E10 so I'm happy to move to E7

mapj1:

Given it is as you say " a modern small detached bungalow built about 1990 with modern wiring.  "

So presumably insulated cavity walls, loft insulation, double glazing, porches on outside doors  etc.


Has the 17kW design been done by someone allowing for the thermal envelope of the house ? I suspect that half that may be enough in practice.

Yes, all well insulated as you suggest.


I'm a retired mechanical design engineer and part of my college course included applied heat so I am able to design a central heating system by calculating the heat requirement for each room. The 17kw is my own design but was done using a 'ready reckoner' rather than using precise u-values. That does include 3kw for immersion element although that is in a well insulated tank and cycling on its stat.

The difference in price between a 1.5kw and a 1.25kw heater is only about £40 and only about £100 more than a 1kw heater so I have erred on the larger size. If the heater doesn't need to charge to its capacity then it won't.


As statter rightly says in response, the charge is only for 7 hours - I'll have anothe look at it but I think it's about right.


Thanks for your comment - Nigel


 

NigelCoker:

If the heater doesn't need to charge to its capacity then it won't.

I am curious to know how it does that. It would need some form of predictive software.


It seems more likely to me that it will draw current until it is "full" and then release the heat in a controlled manner. If there is some left over, then clearly it will draw less energy the next day, but perhaps it has the ability to learn so that if there is heat left over one day, it draws less the next and so on.

Sparkingchip:

Would it be to much to presume they could install two Smart meters side by side interconnected with Zigbee WiFi allowing just one of the meters to forward the information from both to the supplier?

Rumour has it the Zigbee WiFi from the meter could directly domestic appliances.


 

Sparkingchip:

The load won’t average out, when the off-peak supply switches in on the relay  the full load of seventy amps will be drawn, then each individual heater will stop charging when the input thermostat within it is satisfied.

Yes, but that is not what was claimed.