SOLAR
WATTAGE CALCULATION TABLE
Note:
This page has no background so that you can print it out to do your
own calculations.
We will explain
the calculation (and why) then give you examples of how it is done.
You will need
to do steps 14 for each appliance type you use.
 Take
the wattage of the appliance and multiply it by how many you are
using. This gives you your total watts used (TW).
 Take
the TW and multiply it by how many hours a day it/they are used.This
gives you your Watt Hours per Day (WHD).
 Multiply
the WHD by the number of days per week the appliance/s are in
use (you may use your washer 2 days or 5). This gives you your
Watt Hours per Week (WHW).
 Take
the WHW and divide it by 7 (the number of days in a week ). This
gives you your Average Watt Hours per Day (AWHD).
 Add
all of the AWHD to calculate your total average watt hours used
per day. This wiil allow you to choose the proper size energy
system for your needs.
Example using
400 watt light bulbs used 3 hours a day 2 days a week on average.
 Take
the wattage of the appliance and multiply it by how many you are
using. This gives you your total watts used (TW). 100 x 4 =400
(TW).
 Take
the TW and multiply it by how many hours a day it/they are used.This
gives you your Watt Hours per Day (WHD). 400 (TW) x 3= 1200 (WHD)
 Multiply
the WHD by the number of days per week the appliance/s are in
use. This gives you your Watt Hours per Week (WHW). 1200 (WHD)
x 2= 2400 (WHW)
 Take
the WHW and divide it by 7 (the number of days in a week ). This
gives you your Average Watt Hours per Day (AWHD). 2400 WHW) /7
= 343 (AWHD)
Note: It may
be easier and more accurate if you do your calculations for each
individual appliance (so you don't have to average out several appliances).
