domestic 3ph running costs

[Maboza-Ritchy]

Hi
Can anyone advise on the following? A house has 8 rooms, swimming pool and jacuzzi and all electric heating (no gas) and has a 3ph supply and db. The swimming pool and jacuzzi has been done away with and gas central heating has been installed. The owner says he does not see much of a reduction an what he has to pay for electricity and there also seems to be 2 tarriffs high/low.
I'm too long away from the domestic scene to be sure, but if he no longer requires a 3ph supply would it be cheaper converting to 1 ph supply?
If so what % do you think this would reduce by?
Is there a higher tarriff for 3 phase vrs 1ph supply for domestic premises?
Is there a high/low tarriff for 3ph? If so can someone explain why this is?

Thanks in advance
Steveo

 

[flameport]

There won't be any difference between a 1ph supply and a 3ph supply, its the energy used which is important.
Some suppliers used to have a higher standing charge for 3ph, but even if they still did, this would be a tiny difference compared to the total amount paid.
Changing to a single ph supply won't save anything, and will probably cost money, since this would involve someone visiting the property to change the meter.

The high/low tarrif is probably Economy 7 or some similar variant. As this is only of benefit with electric heating, this should be changed to a single price tarrif.

As the electric heating has been removed, there should be an significant reduction in the amount of energy used. However this won't always mean the customer pays less.
If they pay by Direct Debit, the monthly amount will be based on the average previous usage, or some other figures created by the electricity supplier based on the property size, location, phase of the moon or whatever.
If they pay when the bill arrives the amounts should be less, but only if the bill is based on actual meter readings. If these are estimated or have been in the past, the amount paid could be higher or lower than the actual consumption to compensate for incorrect estimates in the past.

You need to find out the actual amount of energy being used, from any past bills which have real meter readings on them (not estimates) and start taking regular meter readings now, e.g. once a week.

 

[holmslaw]

..

 

[Stoday]

Changing to a single ph supply won't save anything,

It will in some areas.

For example, in EDF's Eastern area, the Distribution Use of System charge is 5.96p/MPAN/day for single phase and 6.89p/MPAN/day for three phase.

 

[flameport]

That is a saving, but at less than 1p difference per day, it is so small that the property owner wouldn't even notice.

 

[Maboza-Ritchy]

Hi, and thanks to all that replied. As far as I know the guy has enquired with SP regarding going from 3ph to 1ph. This may make a small difference. Also how he pays for electric.

Thanks again.

 

[Steve]

Changing to a single ph supply won't save anything,

It will in some areas.

For example, in EDF's Eastern area, the Distribution Use of System charge is 5.96p/MPAN/day for single phase and 6.89p/MPAN/day for three phase.

But whether the electric retailer passes these costs on in their consumer bills in an equivalent manner is debatable. Its such a little difference its unlikely they will charge differently.