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Solar Array Sizing
Use the worksheet below to determine
your solar requirements. We have
included an example column and a column
for your system.
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Locate your site
on the average yearly insolation map
in the FAQ section and list the
nearest figures.
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Take the daily
corrected total loads in watt hours
from your load evaluation sheet.
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Divide line 2 by
line 1. This is the number of watts
we need to generate per hour of full
sun.
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Find actual power
produced by your selected module and
enter. (rated amperage x battery
voltage during charging).
Example: Using KC120's, one module
produces 7.1 amps. 13 volts is a
common charging voltage for 12 volt
systems. Actual power = amperage x
charging voltage.
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Divide line 3 by
line 4. The result is the number of
modules required for your system.
When rounding this number, remember
that sets of 2 modules are needed
for a 24 volt system, sets of 4 for
48 etc.
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Example |
Actual
Figures |
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Step |
yearly
average |
yearly
average |
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1 |
5.0 sun
hours per day |
|
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2 |
1000
watt-hours per day |
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3 |
200 watts |
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4 |
(7.1x13)
=92.3 |
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5 |
2.17 |
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Insolation Map
shows southern Ontario with an
average of 4 hours of sunlight
daily.
7 6 5 4 3
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U.L. Lovett Incorporated RR #41, London, ON N6H
5L2
(519) 451-2759 Toll Free
1-877-734-8110 |
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