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Old 04-14-2014, 05:39 PM   #1
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Default How much does electricity cost??

I had a guy at work ask me how much it costs to brew beer using electricity. I replied that I have no idea, but it's GOT to be better than th ecost of propane I used to use!

It got me thinking about relative cost and I imagine there has to be a mathematical way to estimate how much you would spend in electricity for a batch, if you could only provide a few assumptions:

4500W element running full bore

1 hour mash sparge water heating
1.5 hour boil length

Price per Wh = ??



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Old 04-14-2014, 05:44 PM   #2
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I tells you on your power bill? There are cost brackets based on usage amounts and time of day and demand.

http://www.homebrewtalk.com/f170/electrical-costs-normal-brew-day-465981/



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Old 04-14-2014, 05:58 PM   #3
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According to the US Energy Information Administration in Jan 2014 the average residential cost per kWh was $0.1165.
I am currently paying $0.15854 in NH (0.06624 services plus 0.0923 energy).

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Old 04-14-2014, 06:04 PM   #4
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All I know is my electric bill hasn't really gone up since starting my electric brewing. My propane costs have gone way way down.

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Old 04-14-2014, 06:13 PM   #5
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Sorry, I know I can find out what my own cost is per watt, but I wondered if there was anything missing I forgot, or if my time calculations were way off. I've never really timed how long it takes to heat my water.

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Old 04-14-2014, 06:16 PM   #6
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If you brew in your basement the cost of the electricity is very minimal in the winter because a lot of the escaping heat of brewing gets transferred into your home. On the flip side this is a very bad thing when it's hot and you are running A/C.

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Old 04-14-2014, 06:20 PM   #7
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Quote:
Originally Posted by Homercidal View Post
Sorry, I know I can find out what my own cost is per watt, but I wondered if there was anything missing I forgot, or if my time calculations were way off. I've never really timed how long it takes to heat my water.
Kal has a good breakdown estimate here in his FAQ
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Old 04-14-2014, 06:37 PM   #8
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Quote:
Originally Posted by michaeltrego View Post
Kal has a good breakdown estimate here in his FAQ
Awesome! Exactly what I was looking for!
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Old 04-14-2014, 08:05 PM   #9
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If you run a 1000 watt appliance for an hour, you use 1 kilowatt hour. See wikipedia. Your element is 4.5kW. If you run it for an hour, it consumes 4.5kWh. You run it for 2.5hrs and it uses 7kWh. If you pay 12 cents per kWh, you've run up your bill by $0.84.

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Old 04-14-2014, 08:21 PM   #10
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It's not that propane (and propane accessories) are so expensive, They are just not as efficient at transferring heat as immersion electric elements. A gallon of propane has the same energy as 26.7 KWH, so if electricity is 12 cents per KWh a gallon of propane should cost about $3.20, which sounds about right.

Electric elements surrounded by water are ~100% efficient. A propane burner is maybe 50%?

"Business, business, numbers, numbers..."

The fact that I never run out of electrons in the middle of a brew...priceless.



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