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quickest and cheapest
900 micro cheapest 29%  29%  [ 8 ]
900 micro quickest 7%  7%  [ 2 ]
2.3kw kettle cheapest 18%  18%  [ 5 ]
2.3kw kettle quickest 46%  46%  [ 13 ]
Total votes : 28
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PostPosted: Tue Feb 10, 2015 12:07 am 
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do you think it cheaper to boil a cup in a 900 microwave or kettle
also which is quicker
i have done the maths :lol:

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PostPosted: Tue Feb 10, 2015 12:11 am 
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And I've done the burning-my-fingers

I'll use a kettle, even if it's a few decimal points of a penny dearer.

(still interested to see the result though)


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PostPosted: Tue Feb 10, 2015 12:19 am 
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results are surprizing :lol:

i now have 2 cups off boiling water with no use for as whisky tastes rank when diluted as does cider with warmth added :lol: :huray:

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PostPosted: Tue Feb 10, 2015 12:23 am 
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big-all wrote:
i now have 2 cups off boiling water with no use for as whisky tastes rank when diluted


Have you heard? There's this new-fangled non-alcoholic beverage going around, called tea - give it a go!


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PostPosted: Tue Feb 10, 2015 12:26 am 
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tea :dunno:
i have heard about cupasoup an pot noodles

i have entered my pre test opinions into the results

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PostPosted: Tue Feb 10, 2015 8:05 am 
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big-all wrote:
i now have 2 cups off boiling water with no use for as whisky tastes rank when diluted as does cider with warmth added :lol: :huray:


So that's a months savings done in one go then?? :lol: :lol:

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PostPosted: Tue Feb 10, 2015 8:18 am 
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How much is a 900w microwave, mine is old and only 600w?

How much will I save in a year using the cheaper option and how long before I recover the cost if I have to buy a new microwave?

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PostPosted: Tue Feb 10, 2015 9:46 am 
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Guessing.

A kettle requires energy to bring the element to temperature before it can start heating water PLUS the interface between water and element is not as good as it could be.

The microwave starts heating immediately BUT has losses associated with conversion from electricity to microwaves.

All things (losses) being equal there should be no difference (as it takes the same amount of energy to raise water from one temperature to boiling point no matter what that energy is i.e. calorific value) but since losses are the key I'd be interested to hear your findings.

:thumbright:

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PostPosted: Tue Feb 10, 2015 10:51 am 
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kellys_eye wrote:
Guessing.

A kettle requires energy to bring the element to temperature before it can start heating water PLUS the interface between water and element is not as good as it could be.

The microwave starts heating immediately BUT has losses associated with conversion from electricity to microwaves.

All things (losses) being equal there should be no difference (as it takes the same amount of energy to raise water from one temperature to boiling point no matter what that energy is i.e. calorific value) but since losses are the key I'd be interested to hear your findings.

:thumbright:



That was my thinking. No doubt the kettle should be quicker since it is 3x the power output but as for efficiency I am thinking the microwave since the microwaves should in theory only be heating the water. I will also be interested to hear the results.

I will still stick to the kettle though, I have never yet managed to boil a mug of water successfully in the microwave, it's either not hot enough or makes a mess by overboiling.


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PostPosted: Tue Feb 10, 2015 10:55 am 
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keep going answers at tea time today :lol:

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PostPosted: Tue Feb 10, 2015 11:04 am 
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big-all wrote:
keep going answers at tea time :lol:


I wonder if that paint is dry yet. :mrgreen:

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PostPosted: Tue Feb 10, 2015 2:33 pm 
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I'm with the crowd on this. The kettle will boil fastest as it has a much higher power output, but the microwave will be the most efficient. Interested in hearing the results.


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PostPosted: Tue Feb 10, 2015 3:16 pm 
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i will give the answer about 9 oclock[2100] to give people a chance after work

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PostPosted: Tue Feb 10, 2015 4:33 pm 
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A kettle on a gas hob is best, or on the top of my woodburner - then its free.


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PostPosted: Tue Feb 10, 2015 8:56 pm 
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ok lots off surprizes for everyone including me :lol:

900w micro 20w fan 20w light turntable un known
input wattage 1.5 kw[actually 1486w but to make it simple]heat time 2 mins [actually 2 mins 8 sec]
so around 50w per cup based on 1.5kw per hour divided by 30 at 0.6p per cup

kettle 2.23kwh 1m[1.2sec] so 45w per cup or0.55p at 12p a unit

kettles usually require minimum amounts so unless you choose a kettle that is happy with little or no water over your cup full in a boil it advisable to stick to minimum levels

i like most voted micro cheapest and kettle fastest but the answers are a surprize none the less :lol:

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