design a power system, we must first account for every electric
use that you expect. (This is most important for an off-grid system.)
We need to know not only how much power something uses, but also
how long it will be on each day. The power multiplied by time is
the energy used. So, a circular saw that takes 1000 watts but is
on only an hour can take as much energy as a 75 watt light left
Energy is measured in Kilowatt-hours (a kWh is 1000 watts x 1 hr).
The average American home uses between 10 kWh and
30 kWh each day. The average solar home
uses between 1 kWh and 5 kWh each
day. Choose your life-style wisely: it's easier, cheaper, and
more environmentally friendly to save energy than to add more solar
power. Think efficiency!
Filling out a load sheet will show you how much total energy you
will need each day. This is a free consultation. It will also show
you where your energy is going, so you can adjust your life-style
to make solar power more affordable. The Solar
Sizer is a general questionnaire to get you
some ballpark energy figures. You can also
look at your electric bill to see how many kWh you use a month.
Sizer Excel Spreadsheet will give you a more
advanced assessment. It is our detailed load sheet, focusing electrical
usage needs on one item at a time. This is what we base our free
custom design and estimate upon.
If you don't
have Excel on your computer, you could print off the Solar
Sizer Basic.pdf file, fill it out and mail it
to us. This can delay the estimate, because we have to hand enter
all your data into the spreadsheet. Please try to use the Solar
Sizer Excel Spreadsheet.