Power Measuring Meter on sale

espresso

trish06 wrote: »

Please click the thanks button

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Were you not taught that it's rude to ask?

:rolleyes:

Plushchris

Cardew wrote: »

Agree with the 1.7kWh but that prices electricity at 26p for a kWh.:eek:

I think a more realistic figure for that TV left on standby 24/7 for the whole year would be 17p!

So you could save up and buy a chocolate bar every 3 years with the savings.

Proving the fact that you are not a real moneysaver!

If you shop around you can get a chocolate bar a lot cheaper than 51p! :rotfl:

Cardew

Plushchris wrote: »

Proving the fact that you are not a real moneysaver!

If you shop around you can get a chocolate bar a lot cheaper than 51p! :rotfl:

Thank you.

My kids will hate you, as on the strength of your advice I am cutting their pocket money!

u109230

OK, I have some results back for 2 freezers.

In 1 day,19hrs & 30 mins (1.8125 days), my two freezers in the garage have used nearly 4.2 KWh of juice combined. (846 KWh/annum)

The small chest freezer is >10 years old & has a volume of 0.245m3/8.65ft3 (energy efficiency rating unknown, seals appear intact).
The upright, frost free freezer is ~8 years old & has a volume of 0.273m3/9.64ft3 (energy efficiency rating is C, seals look OK).

The doors are opened about once a day on both appliances for about 30 secs. Both are nearly full of contents.

846 KWh per annum appears alot to me for that volume of freezing capacity - is it accurate to do this measurement in summer, over a reatively short time & extrapolate? Does the ambient temperature have a significant impact on my sums?

Thanks for your replies.

Cardew

u109230 wrote: »

846 KWh per annum appears alot to me for that volume of freezing capacity - is it accurate to do this measurement in summer, over a reatively short time & extrapolate? Does the ambient temperature have a significant impact on my sums?

Thanks for your replies.

I checked this over a week in mid winter and mid summer for my large old Bosch 14 cu ft chest freezer in the garage.

IIRC the difference was about 1kW a week. (7kWh to 8kWh) but of course this was hardly a controlled experiment.

In your case you perhaps need to find out which freezer is causing the highish consumption.

[Deleted User]

u109230 that is an horrific result for a freezer and I know I am shooting from the hip here but I can`t help gasping in horror because I can compare to 0.5 kwh for cooking a casserole

Unless you are freezing home grown produce, it just does not seem worthwhile running these freezers. Have you looked at the which site? I haven`t but there may be some help on there

u109230

Thanks Cardew & I reallise that my calculations are a bit 'back of a fag packet' - more refinement is needed.

u109230

kittie wrote: »

u109230 that is an horrific result for a freezer and I know I am shooting from the hip here but I can`t help gasping in horror because I can compare to 0.5 kwh for cooking a casserole

Unless you are freezing home grown produce, it just does not seem worthwhile running these freezers. Have you looked at the which site? I haven`t but there may be some help on there

De-commissioning & disposing of at least the older chest freezer is on my list of definite options! We're a large-ish family of 7 & get through a lot of grub! - nearest supermarket is 12 miles away from where we live (3.5 litres of petrol per round trip).

Replacing the 2 freezers with a modern freezer of equivalent volume (Liebherr GTS 6112, 20.2 ft3, 408Kwh/annum) is about £539. It would take 8-10 years (excluding interest lost on the outlay) to pay itself back purely on electric saved (at todays prices).

What kind of energy efficiency losses do freezers accrue over time? Will the Liebherr still be relatively economical in 10 years?

Cardew

u109230 wrote: »

Replacing the 2 freezers with a modern freezer of equivalent volume (Liebherr GTS 6112, 20.2 ft3, 408Kwh/annum) is about £539. It would take 8-10 years (excluding interest lost on the outlay) to pay itself back purely on electric saved (at todays prices).

What kind of energy efficiency losses do freezers accrue over time? Will the Liebherr still be relatively economical in 10 years?

As you imply, the loss of interest on capital expentiture can't be ignored, if you really want to work out the economics.

It is easy to get 7% gross on fixed term accounts. So £539 invested would produce £38 pa.

The difference between the 408kWh and 846kWh(438kWh) will save you anything between £30 and £60pa depending on your electricity tariff.

So even allowing for marked increases in electricity prices it is hardly likely to be an economic proposition to replace.

As an aside I read about a 'uber' money saving person(on an Economy 7 tariff) who said that he set the freezer a couple of degrees colder than normal put it on a timer so it only powered during the 7 hours of E7.

He claimed the internal temp never rose more than a few degrees during the day.

[Deleted User]

What about some energy saving insulation on top of the food in the chest freezer? might that work and does the upright one have fronts on the shelves?