# Equipment operation cost

Discussion in 'Freshwater Tank Equipment' started by skjl47, Dec 1, 2012.

1. ### skjl47Valued MemberMember

Hello; A few weeks ago I took part in a thread discussing the cost to operate equipment. I have a small meter and decided to test the cost of some of my equipment. I set the meter up and plugged into it an Aqua-Tech 30-60 HOB power filter.
The measure started at 2:30 PM on November 8, 2012. I checked it today(12-1-2012) at 9:41 PM. If my count is correct that is 23 days. The power filter used 3.87 kWh in that time. It drew a steady 0.17 amps if I read the meter correctly. At 12 cents per kWh it calculated a cost of 46 cents. I have not run the numbers to check the meter, but if this is correct it cost two cents per day to operate this particular filter.
I will reset the meter and test a different piece of equipment.

2. ### ryanrModeratorModeratorMember

Thanks for the feedback.

Do you know the wattage rating for the filter? If so, it's an easy calculation

(wattage rate) / 1000 gives kWH
Multiply result from above by 24 gives daily kWH used
Multiply by your electricity cost (\$ per KWH) gives your daily cost.

4. ### klutz10154Valued MemberMember

I'd like to know about the lights and heaters as well! thanks!

5. ### ryanrModeratorModeratorMember

Lights are easy.

It's the same calculation for all electrical devices.

Lights, instead of multiplying by 24, you multiply by the hours you have them on.

Heaters, I assume mine are on for 8 hours a day (about 30% of the time)

7. ### skjl47Valued MemberMember

Hello; I checked the meter just now. It is giving a reading of 6 for what the meter terms active watts.
The spot readings this morning were- W (active watts) = 6 while varying between 5 and 7 but most often on 6.
VA (apparent power) = 16 There is no explanation for this unit in the instructions.
V (voltage) = 120
Hz (hertz) = 59.96
PF (power factor) = 0.31 to 0.40 There is no explanation for this unit in the instructions.
Tariff (cost of electricity per kilowatt hour) = 12 cents. This is set based on an average from my bill.

Thank you!