Step 4: Size your system
In general, dc to ac
inverter photovoltaic systems sized between 1 to 5 kilowatts are usually
sufficient to meet the electricity needs of most homes. One advantage of
grid-tied systems is that you can use solar PV to supplement or offset some of
your electricity needs; therefore you can size your system to match your budget
and always add to the system later if needed.
Also as a side note, here's a rule of thumb to remember to
help you estimate the physical space your PV system might need: one square foot
yields 10 watts. So in bright sunlight, a square foot of a conventional
photovoltaic panel will produce 10 watts of power. A 1000 watt system, for
example, may need 100 - 200 square feet of area, depending on the type of PV
module used.
This may seem incredible and impossible to do, but many
computer technophiles are going "green" when they travel with a
laptop in tow these days. If you are familiar with "extreme" or
remote computing this solar charge
controller may not seem too far fetched. Let's not forget that many
professionals enjoy rugged recreational activities, but just can't always leave
the office behind.
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