Just need to check my workings out.

JamesFews

I wont bother with peak rate as I cant afford to turn it on in peak hours. I only turn it on for 2 hours early morning, 3 hours aftrernoon and 2 hours night.

I will take a reading when I get home just before it comes on at 8pm and then do the same tomorrow. Only trouble with doing it this way is I cant use anything else during those 7 hours, which is why I was trying to work it out the way I was.

Pizza tonight!

victor2

Take readings without the boiler on to see what your typical usage is for other appliances etc.
Subtract that from readings when the boiler is on and you'll get an idea what can be attributed to the boiler.
If you really want more detail, consider a plug-in monitor for sockets. That will only work for devices with a 13A plug on them though. Things like an electric cooker or shower can't be checked with such a device. You need a monitor on the main supply for that, which can cost a bit more (or a smart meter).

footyguy

JamesFews wrote: »

I made an error in the format of the cost... please see correction in red.


Can you see again please

14.4kW x 7 = 100.8kW

100.8kW / 1000 = 0.10

0.10 x 0.17p = 0.72p

0.72p x 365 = £263.79 Per Year

263.79 / 12 = £21.98 Per Month

This is taking into account if I had it on for the whole year. I know I wont, but it helps me work out what the monthly cost is.
Thats using this website to work out the cost and conversion step by step.

https://www.saveonenergy.com/energy-consumption/

Thanks
James

The site you link to uses an example rated in watts
There are 1000 watts in a kW, hence the reason for the part of the calculation I highlighted in blue.

However, the appliance you are referring to you have already rated in kW


(If you want to retain the same format, you need to change 14.4kW to 14400 W, hence the first line would then become:

14400W x 7 = 100,800W )

macman

Do not electric boilers modulate in the same way as gas boilers? If so, it won't be drawing 14.4kW for the full 7 hours. Or if not, it will be switching on/off on the thermostat: same result.