Dimplex Vs German Ceramic Core Radiators

macman

DaveGain said:

danrv said:

So the reason to change is the same as mine. Very expensive Economy 10 rates.
A competitive E7 tariff and well insulated storage heaters designed for it would be cheaper to run than what you currently have.

yes that and the fact that I'm using over 10,000kwh per year for a tiny house seems excessive.  Thanks for your comments.

You still don't get it. Please explain to us how changing to any other sort of heaters will reduce this consumption? Which is not excessive anyway. If you need 10,000kWh pa to heat the property, then that is fixed, unless you improve the insulation or live with lower temperatures.
The only way to reduce your bills is to pay less for your electricity, and E7 is the only option. If your NSH's don't last through the day, then you either need to adjust the output to a lower setting, or get bigger heaters. 

macman

danrv said:

DaveGain said:

daytime rates are currently the same as my existing off peak rate which is why I need to get off my tariff, can only do this by changing heating system

Economy 10 by any chance? 
I’m also stuck on it with no other options available. My single storage heater is 10kw and the tariff is extortionate.
Eon have said that they could change to an E7 meter and I can decide the times. Currently 
I have so called ‘cheap rate’ until mid afternoon. Maybe to get the tariff price down I could 
run the heater on E7 instead, assuming the timer can take the power.
If it really needs the 10hrs, I’m back to square one.

Not so. The E7 times are determined by the DNO for your region, they can't be chosen by the customer. Whoever told you that was clueless. 

danrv

macman said:

Not so. The E7 times are determined by the DNO for your region, they can't be chosen by the customer. Whoever told you that was clueless. 

Ok, thanks.. Did read something about that.
Message says that their dedicated team can help exchange the meter to Ecomony 7 
with my preferred time.
Doesn’t matter. Regular Economy 7 hours and new storage heaters will get my electric heating back to a normal setup.
It’s just that my current E10 off peak period (5.40am - 3.40pm) is kinda useful for washing machine, dishwasher and shower etc.
I always turn on the immersion heater during off peak too. I can fit a timer for this when I change to E7 but probably won’t for the others.

Don’t want to go too far off topic but regarding storage heater system configurations, there’s pros and cons for NSHs all round vs NSH with elec. rads (for bedrooms).
With NSH/rads is it usual to have whole house switchover which would mean that the radiators would use the peak rate electric?
Would have thought that the E7 circuit should just be for storage heaters and the hot water. 24/7 for heater fans and everything else.

Gerry1

E7 by definition is whole house switchover, i.e. all usage is at cheap rate during the relevant hours no matter how it's wired.  It's convenient if the meter does the switching for the NSHs and immersion heater because it means they can't accidentally use day rate which is the risk if a timer is adrift from the E7 times.

tim_p

Gerry1 said:

E7 by definition is whole house switchover, i.e. all usage is at cheap rate during the relevant hours no matter how it's wired.  It's convenient if the meter does the switching for the NSHs and immersion heater because it means they can't accidentally use day rate which is the risk if a timer is adrift from the E7 times.

So how does the metering switch from the standard meter to the Off Peak (assuming a two meter system here)?

Gerry1

E7 has one meter with two registers.  All consumption is recorded by whichever register is selected at that moment.

matelodave

tim_p said:

Gerry1 said:

E7 by definition is whole house switchover, i.e. all usage is at cheap rate during the relevant hours no matter how it's wired.  It's convenient if the meter does the switching for the NSHs and immersion heater because it means they can't accidentally use day rate which is the risk if a timer is adrift from the E7 times.

So how does the metering switch from the standard meter to the Off Peak (assuming a two meter system here)?

There are three ways of doing it - older systems used to have a big time switch, then some DNO's used teleswitches which are controlled either over the network or via wireless signals which give them a lot more flexibility in the changeover times. Most of the Scottish THTC configuration use this.
More modern E7 meters may have a switched high current output direct from the meter using the inbulit timer or have a auxiliary contact which controls an external contactor which switches the E7 circuits.

You need to have a look at what your metering arrangements are and work out where the wiring goes.

Dual meter systems usually have two off peak registers plus a third dedicated heating one - these are generally where the customers are getting a really raw deal as the suppliers want to try and get of them. The only answer being to get an E7 set up which may involve some wiring changes and upgrading the storage heaters as most of them rely on both an afternoon and evening boost to store enough heat.

tim_p

Gerry1 said:

E7 has one meter with two registers.  All consumption is recorded by whichever register is selected at that moment.

My mothers place has two meters, one an Entity 3 phase 4 wire for normal day rate and an ancient Sangamo Weston spinny disc one for the off-peak, gonna look at the wiring as I can’t see that the day rate one will stop during the E7 period.  

Gerry1

Are you sure it's really an E7 tariff?

matelodave

tim_p said:

Gerry1 said:

E7 has one meter with two registers.  All consumption is recorded by whichever register is selected at that moment.

My mothers place has two meters, one an Entity 3 phase 4 wire for normal day rate and an ancient Sangamo Weston spinny disc one for the off-peak, gonna look at the wiring as I can’t see that the day rate one will stop during the E7 period.  

that sound like the old white meter tariff where the off peak and peak supplies were fed through separate meters, in which case its not a true E7 supply and you wont get the benefit of off peak electricity for any of the normal household supplies.

As Gerry says a proper e7 give you 7 hours overnight for all your energy and the meter will have two registers, one for each period, some meters will also have a third totalising count which adds the two readings depending on which button is pressed.