u/Unfair_Turn2833

Hello, could someone cast an eye over these Electric Radiators Calculations? I have always steered away from Electric Radiators due to higher costs but wonder if there might be a way to reduce these considerably? 

A house with 8 radiators ( 2 x 1000 Watts and 6 x 500 watts) total output 6 KW if running for 1 hour. With zoning (setting each room according to use via app) I am sure that this could be reduced to about 4KW.

Secondly there is the question of modern electric radiators cycling, using thermostats to switch off when required temp is reached. The main Electric Radiator firms claim that this may result in 1/3 energy use when used. However, perhaps they are lab tests, real world heat losses and situations would not be so good. If they they are even much higher 3/4 energy use on their claims, that would perhaps reduce 4 KW to 3 KW for total house output.

So 3 KW for I x hour would be £0.90 ( 3 KW x £0.30, current cost). Then say 6 hours a day the cost would be (£0.90 x 6) = £5.40 x this by 30 days is £162 per month, expensive yes!

Now comes the final reducer, cheap tarrif 7.5p overnight IOG, batteries needed I realise, 20 KW but if you could use that it would decrease costs considerably. (£5.40 x 7.5p) = £40.50.

Please note, I appreciate Heat Pumps may be better but not possible at this house. Heating Oil at the moment, wish to stop as soon as possible. Also hot water not included but might go Sunamp Thermino, (not much space). Appreciate that if I use electricity which has been imported overnight with (3KW x 6), 18 KW, other electrical usage would be at higher rate. Having said all of that, £40.5 for a month's winter heating ( I have a wood burner as well, but free wood) sounds very reasonable to me or have I got my calculations wrong and its all just wishful thinking. 

In summary with zoning, assuming radiators use less electricity when cycling on and off and applying cheap tarrif from battery charged overnight might they be much less cost than is assumed, as I certainly did. 

Would be appreciate any observations, thanks for reading, hope it made sense!

Hello, could someone cast an eye over these Electric Radiators Calculations? I have always steered away from Electric Radiators due to higher costs but wonder if there might be a way to reduce these considerably? 

A house with 8 radiators ( 2 x 1000 Watts and 6 x 500 watts) total output 6 KW if running for 1 hour. With zoning (setting each room according to use via app) I am sure that this could be reduced to about 4KW. Secondly there is the question of modern electric radiators cycling, using thermostats to switch off when required temp is reached. The main Electric Radiator firms claim that this may result in 1/3 energy use when used. However, perhaps they are lab tests, real world heat losses and situations would not be so good. If they they are even much higher 3/4 energy use on their claims, that would perhaps reduce 4 KW to 3 KW for total house output. So 3 KW for I x hour would be £0.90 ( 3 KW x £0.30, current cost). Then say 6 hours a day the cost would be (£0.90 x 6) = £5.40 x this by 30 days is £162 per month, expensive yes! Now comes the final reducer, cheap tarrif 7.5p overnight IOG, batteries needed I realise, 20 KW but if you could use that it would decrease costs considerably. (£5.40 x 7.5p) = £40.50.

Please note, I appreciate Heat Pumps may be better but not possible at this house. Heating Oil at the moment, wish to stop as soon as possible. Also hot water not included but might go Sunamp Thermino, (not much space). Appreciate that if I use electricity which has been imported overnight with (3KW x 6), 18 KW, other electrical usage would be at higher rate. Having said all of that, £40.5 for a month's winter heating ( I have a wood burner as well, but free wood) sounds very reasonable to me or have I got my calculations wrong and its all just wishful thinking.  In summary with zoning, assuming radiators use less electricity when cycling on and off and applying cheap tarrif from battery charged overnight might they be much less cost than is assumed, as I certainly did.  Would be appreciate any observations, thanks for reading, hope it made sense!