Do these electric calculations look correct.

Looks wrong to me, although I don't understand your calc.

Multiply by 7.5 gives 114 units.

Multiply by 22.29p gives £25.35.

Those are very expensive units!

s only ?2.43 per quarter, appears to be too cheap a running cost. W atts 750 Watts/1000 0.75 hours used 5 kw x hours 3.75 unit price 22.29p kwh pence 2.6748 divide 100 ?0.03 cost week ?0.19 cost 91 days ?2.43

Thanks guys I used 750 instead of 7500. The unit price is the high rate which drops to 13.73 and averages 15p overall. I put the high rate in my spreadsheet and it calculates at an average for me.

Thanks

Mistake on the first line. Should be 7500W.

Try 7500

Well, the power consumed is out by a factor of 10, for a start. It's

It sounds as if you're on a tariff with no standing charge - where you pay more for the first so many units per quarter, and a lower rate for the rest.

Unless you're ever in the situation where you don't use all of your dear units, it may be better to calculate the *effective* standing charge[1] and write that off. You can then calculate the *marginal* cost of using any given appliance, based on the price of the cheaper units.

Is that E7 or one of those stupid "no standing charge" tarrifs where you pay the standing charge by a higher rate for the first n units/quarter?

Either way those still strike me as high prices:

E7 here is 16.08 p/unit day 6.08 p/unit night, 18p/day standing charge (EDF Blue Price Promise Feb 15).

Ordinary "normal use" is 11.143 p/unit, 20.95p/day standing charge (iSupplyEnergy iFix201405)

Ordinary "low use" 15.06p/unit 10p/day standing charge (Npower Go Save).

Norweb area plus VAT @ 5%.

Have you not dropped a 0 off your wattage?

Brian

That looks a hard way of calculating electric costs.

Thats basic, the shower is unlikely to use 7500w, but it gets you into a rough idea of cost.

Got it sorted now (dropped a zero) Thanks for the input.

It goes likw this, A unit is a Kwh.

Yes thats correct, I have done the sums and I am better off with this tariff as I shut the house down for 8 weeks in the year for hols.

and a bit more

According to my calculator, 91 x 0.28 = 25.48!

f*ck me is that how you costed up the bat(tery)-mobile?

Jim K

Ah yes. Must have had a senior moment.