Power Costs & Consumption Guide

Use the first table here to figure the
power costs for your grow room.

Use the second section to safely figure the
electrical needs/loads in your grow room.

Please read through it entirely as it has valuable fire safety info.

Your monthly power bill will tell you what your power company
is charging you per month for each kilowatt.

Example: This table is figured at .01 (1 cent) per kwh for ease of
determining costs for your bill. In California you may be paying as
much as .20 (20 cents) per kw hour. So.......check your bill and
multiply your cost per kw hour times any figure in this section to get
the actual cost of your electrical expenses.......

A 1000 Watt bulb on 24 hours a day for 1 month will cost $07.20
18/6 Light schedule will cost $5.40
12/12 Light schedule will cost $3.60

A 600 Watt bulb on 24 hours will cost $04.32 a month
18/6 Light schedule will cost $3.24
12/12 Light schedule will cost $2.16

A 430 Watt bulb on 24 hours will cost $03.10 a month.
18/6 Light schedule will cost $2.32
12/12 Light schedule will cost $1.55

A 400 Watt bulb on 24 hours will cost $02.88 a month
18/6 Light schedule will cost $2.16
12/12 Light schedule will cost $1.44

A 250 Watt bulb on 24 hours will cost $1.80 a month
18/6 Light Schedule will cost $1.35
12/12 Light schedule will cost $0.90

Example: This table figured at .06 Cent Per kwh
which is the national average cost of power:

A 1000 Watt bulb on 24 hours will cost $43.20 per month
18/6 Light schedule will cost $32.40
12/12 Light schedule will cost $21.60

A 600 Watt bulb on 24 hours will cost $25.92 per month
18/6 Light schedule will cost $19.44
12/12 Light schedule will cost $12.96

A 430 Watt bulb on 24 hours will cost $18.58 per month.
18/6 Light schedule will cost $13.92
12/12 Light schedule will cost $9.29

A 400 Watt bulb on 24 hours will cost $17.28 per month
18/6 Light schedule will cost $12.96
12/12 Light schedule will cost $8.64

A 250 Watt bulb on 24 hours will cost $10.80 per month
18/6 Light schedule will cost $8.10
12/12 Light schedule will cost $5.40

FIRE SAFETY 101: Electrical loads

Here's something to help you with electrical loads....... AMPS
To figure how many amps you'll use just follow this very simple
formula, please use a calculator as you don't want to err here.

Divide watts by volts to equal amps, a 1000 watt fixture
in the US @ 120 volts would be figured like this.......
1000 divided by 120 = 8.33 amps

400watt fixtures.......
400 divided by 120 = 3.33 amps

It's easy to see that you can only safely run one 1000 watt bulb
on any single household (usually 15 amp) circuit or breaker. Using
common sense here will prevent you from plunging your plants into
unscheduled darkness due to a blown fuse or tripping a breaker,
or worse yet starting a fire in your own crib.

Please also be aware that it isn't a good idea to load
any circuit past 85% of its capacity. So on a 15 amp
circuit or breaker no more than 12.75 amps. This should stop
any small power spikes or surges that commonly occur
from blowing a fuse or tripping a breaker. Some fan motors
have power draws of 3amps, be careful figuring these in too.

Thanks for the info.helps alot for preplanning a new setup.ima save this one.

Good info but you gotta deal with your specific grid costs. Many start at a certain rate then change. Where I am, 8kw on 12/12 and 1kw on 24hrs comes out to $2,000 per month...

You also have to figure in the cost of fuel to get the electricity.

First is power consumption,then comes fuel consumption to provide that power.

Also most power companies charge a flat rate for the first 1,000 kwh's and a flat rate for every 1,000 kwh's after that....same for the fuel charges.Where I am in Fla. I get charged I believe 0.05197 cents per KWH for the first 1,000 KWH's after that I get charged 0.06197 cents per KWH for every 1,000 KWH's after the first 1,000 KWH's.


Even though I am not growing right now You also have to figure in the cost of fuel to get the electricity.

First is power consumption,then comes fuel consumption to provide that power.

Also most power companies charge a flat rate for the first 1,000 kwh's and a flat rate for every 1,000 kwh's after that....same for the fuel charges.Where I am in Fla. I get charged I believe 0.05197 cents per KWH for the first 1,000 KWH's after that I get charged 0.06197 cents per KWH for every 1,000 KWH's after the first 1,000 KWH's.


Even though I am not growing right now I'll be sure to post the charges when I get my new bill to help others factor in the charges for fuel and charges between the 1st 1,000 KWH's used and every 1,000 KWH's after that. I'll be sure to post the charges when I get my new bill to help others factor in the charges for fuel and charges between the 1st 1,000 KWH's used and every 1,000 KWH's after that.

headiez247 said:

Good info but you gotta deal with your specific grid costs. Many start at a certain rate then change. Where I am, 8kw on 12/12 and 1kw on 24hrs comes out to $2,000 per month...

Click to expand...

HOLY HELL!!!

Where I am at I only spend about $225 for 4 1k's on 12/12 and one 600 on 18/6 plus a couple fans...

That also includes everything else in my home as well..

Here's a helpful and relative link: Electricity Cost Estimator