How best to connect/run cylinder and electric boiler

[silver50]

I'm completely puzzled then! I thought exactly what you've said but when asked my electrician if water could be timed to come on for say, the last two hours on the low tariff, he said no

That evening I looked at switches like the electronic 7 from Horstmann thinking it should be fine. Then the guy at Horstmann said on Thursday morning it can't be timed on the E7 supply. He pretty much seemed to make out that the teleswitch is the only switch/timer. I can't understand why...

Realistically though, the E7 peak charges are very high and I'd say cancel out any benefit. I think my new single supply on a best possible tariff seems the best idea

 

[Madrab]

All E7 is, is a timed period that the electricity is cheaper, it's no different than peak electricity. So I don't know why they are telling you that.

My mum's CU was wired with a dual circuit and the peak tails ran to the usual lights and other sockets etc on the 1st circuit. The off peak E7 tails ran to the 2nd section where her storage heaters and main immersion were wired. That circuit energised at 11pm and the horstmann controller ran the immersion for 3 hours between 2am and 5am.

That's all academic though as you mention, as you are going to a single tariff, better that and then let your tenants decide how they want to use it.

 

[Richardthe3rd]

Scottish Power did do a great tariff for electric storage combi boilers & the name of which escapes me. It's an age thing!!!

These are units I've fitted & would recommend;
http://www.heatwell.co.uk/our-products/electric-combi-storage-boiler/

Most utility companies will limit the type of tariff they'll offer & certainly a 'flow through' type boiler is rubbish for running costs. Most will only offer E10 with a flow through type electric boiler.

Speak with Heatwell, they'll give you the lowdown on tariffs for their units.

For a rented property I'm unsure why you're too concerned about running costs??!!
HTH

 

[EFLImpudence]

Re: Timer

The point is not that you can't time the off-peak, but that there is no point doing it.

As said, when it comes on (11pm?) it will heat the water to the set temperature and then switch off (1,2,3,4 hours?).
The time on depends on the residual temperature from the day before.

The object of the immersion is to heat water to the temperature you require, not to only spend twenty five pence on electricity and then have a cold bath.
If the water is too hot, turn down the thermostat.

 

[silver50]

Many thanks to you all for the informative helpful replies

I will hopefully see some headway this week with selecting how to run and time the heating and hot water