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Electricity Cost&Consumption

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jlehigh

Hermit D Crab
Joined
Nov 20, 2003
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Kirkland/Juanita
Hey all,

I put together this operating cost summary for my 280Gal tank, I thought I might as well share the data as it may be helpfully for people to gage cost ect.. Fee free to let me know if you see errors as I am sure I could have made some. Note this covers the main bases for my system. I have incidental usage through a feeder, auto top off ect..

Power Consumption/Cost summary
1000watt hr = 1 Kwh
KWH usage in excess of 600Kwh cost .079571 per Kwh through PugetSoundEnergy

Lighting
2x400W 20K DE
2x250W 10K SE
1300W x 9hr = 11700W daily = 11.7Kwh per day = 351Kwh monthly
T-5 Actinics
160w x 14hr = 2240W daily = 2.24Kwh per day = 67.2Kwh monthly
tot = 418.2Kwh per month

418.2Kwh at .079571 = 33.28 per month

Water Movement
Closed loop
Ampmaster 3500 with OM 8-way
351W x 24hrs = 8424W daily = 8.424Kwh per day = 252.72 monthly
tot = 252.72 per month

252.72Kwh at .079571 = 20.11 per month

Return pump
Mag 12
110W x 24hrs = 2640W daily = 2.64Kwh per day = 79.2Kwh monthly
tot = 79.2Kwh per month

79.2Kwh at .079571 = 6.30 per month

Skimmer Pump
Sedra 5000
50W x 24hrs = 1200W daily = 1.2Kwh per day = 36Kwh monthly
tot = 36Kwh per month

36Kwh at .079571 = 2.86 per month

Heaters
4 250W and 1 300W
Winter runtime = 12hrs
1300W x 12hrs = 15.6Kwh per day = 468Kwh per month
tot = 468Kwh per month

468Kwh at .079571 = 37.24

Summer run time = 4hrs
tot = 117Kwh
117Kwh at .079571 = 9.30

Summary
Lighting = 33.28
H2o Movement = 20.11
Return = 6.30
Skimmer = 2.86
Heaters = 37.24(Winter)
= 9.30 (Summer)
TOTAL = 81.15 to 109.09 Monthly
 
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jlehigh

Hermit D Crab
Joined
Nov 20, 2003
Messages
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Kirkland/Juanita
lol! Yea I put off doing this calculation as I REALLY didn't want to know what I was paying :)

The interesting thing is my bill isn't reflecting such high charges... I am wondering if some of the equipment is not requiring as much watts as they are rated to run at..
 

Scooterman

Administrator
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Oct 30, 2003
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Location
Louisiana
jlehigh said:
The interesting thing is my bill isn't reflecting such high charges... I am wondering if some of the equipment is not requiring as much watts as they are rated to run at..

Actually this is to hold true to most all electrical equipment, those are the listed or max power consumption of each device. Running power is usually much less, after startup. which would probably cut the cost down to 1/3 of that. You would need to use an ammeter, inline or clamp on to get actual reading, then you would also consider accuracy of the meters using to test.
 

MikeS

Well-known member
Joined
May 23, 2004
Messages
1,654
Location
Wyoming
jlehigh said:
TOTAL = 81.15 to 109.09 Monthly
Yeah.....that statistic probably belongs on the list of things about this hobby you are better off just to be ignorant about...or even better, the list of things about this hobby to keep your wife ignorant about... :lol:

MikeS
 

Zephrant

Engineer
Joined
Feb 13, 2004
Messages
120
Location
Spokane, WA
jlehigh said:
Heaters
4 250W and 1 300W
Winter runtime = 12hrs
1300W x 12hrs = 15.6Kwh per day = 468Kwh per month
tot = 468Kwh per month

468Kwh at .079571 = 37.24
The neat part is that you could replace these heaters with underwater pumps. Since you are adding heat all the time anyway, might as well make it move water around too. A 100W pump fully submerged will dump all 100 watts in to the water, just like a heater does.

Note that this does not work well if you have to run a chiller.

Zeph
(edit- Fixed typo on Watts number)
 
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jlehigh

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Nov 20, 2003
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Kirkland/Juanita
That is a great point Zeph. In my case I only have a submerged skimmer pump because keeping the tank cool in the summer is a challenge of mine (Cant afford a chiller)
 

dwall174

Well-known member
Joined
Jun 3, 2004
Messages
121
Location
Southeastern MI
jlehigh said:
keeping the tank cool in the summer is a challenge of mine
1460-Watts of lighting! I cant imagine why you can’t keep things cool! :D

jlehigh said:
STOP USING THAT DARN ELCETRIC SPACE HEATER!
I have always tried to blame it on her hair drier & curling iron! :lol:
 

dnjan

alveopora
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Sep 9, 2003
Messages
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Seattle
Thanks for doing the calculations. I thought the comments by somebody in the big skimmer thread about some skimmers saving money because they didn't need as large a pump (and therefore used less energy) were a bit off base. The overall cost of energy for a skimmer pump is pretty small compared to lighting and circulation/return pumps.
 

jlehigh

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Your welcome dnjan!

I think that is a fair conclusion for small to medium systems. Some of the larger deltecs and euroreefs are running several small pumps which probably rival or surpass the costs of running counter current air type systems..
 

dnjan

alveopora
Joined
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Messages
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Seattle
However those systems probably have significantly larger lighting and water-movement costs. There are probably very few systems with large skimming capacity but minimal lighting. (other than tanks specializing in non-photosynthetic corals). I think that the relative proportions of your costs are reasonable for most hobbiest systems.

As a side note - the best investment a person can make is good reflectors.
 

jlehigh

Hermit D Crab
Joined
Nov 20, 2003
Messages
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Location
Kirkland/Juanita
hehehehe it wasn't too bad Steve, but thanks.

dnjan said:
However those systems probably have significantly larger lighting and water-movement costs. There are probably very few systems with large skimming capacity but minimal lighting. (other than tanks specializing in non-photosynthetic corals). I think that the relative proportions of your costs are reasonable for most hobbiest systems.

As a side note - the best investment a person can make is good reflectors.
I completely agree with that deduction! We would all choke on the cost of skimming the popular public systems but we aren't keeping full size sharks and feeding the equivilent of several Pike Place fish stores daily either.

Totally agree on the reflector statement. Keep the glass, reflectors and water clean.
 
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