Hey

Really now?? I think we need to start IQ tests for new signups...
 
By the way if you are wondering why the others put you down its because your question would be the equivalent of going to a cars forum and asking how much gas will I spend per month if I buy a car.
 
Here is an explination to help you figure out your own usage...
I found the formula... this assumes $0.12 per KW hour price... (If you pay a different amount change the formula below)

Explination = Watts used by device (a 400 watts HPS) X hours used over the course of a month = total watt hours
Example = 400 watts x 24 hours/day x 30.5 days/month = 292,800 Total Watt-hours

Explination = now you have to convert Wh (watt hours) to kWh (kilowatt hours) Wh / 1000 = kWh
Example = 292,800 Wh / 1000 Wh = 293 kWh

Explination = now take you kWH and multiply it by the price you pay your electric provider
Eample = 293 kWh x 12¢/kWh = $35.16/mo.; $422/yr.

When you buy electricity they charge you by the kilowatt-hour (kWh). When you use 1000 watts for 1 hour, that's a kilowatt-hour.
 
Back
Top Bottom