How it works
Each of the arrays can produce 3,120 watts, for a total system output of 9,360 watts.
That’s enough solar power to supply three energy-efficient homes.
Each array is made up of 16 individual panels, so the project totals 48 panels.
The panels are approximately 3 feet by 5 feet in size and have a peak power output
of 195 W.
Each PV array is mounted on a dual-axis tracking system. The tracking system automatically
pivots and tilts the PV arrays to face the sun throughout the day. The tracking
system also adjusts the PV arrays to follow the rise and fall of the sun during
the passing of each season. This increases the array output by as much as 30 percent
compared to a fixed PV system.
Each PV array is connected to a power inverter that converts the direct current
(DC) produced by the PV panels to alternating current (AC) that is compatible with
the electrical grid. A solar data logging system is connected to each array and
inverter to monitor the solar production.
Learn more
An energy-efficient home uses an average of 3,500 kilowatt-hours per year. A 3 to
4 kilowatt solar electric system would be needed to offset the home’s yearly energy
consumption.
The cost of a solar electric system varies depending on the size of the system.
The average cost for a solar electric system is approximately $10 per watt (installed).
This up-front cost can be offset by incentives such as the one administered by the
Minnesota Department of Commerce and funded by Xcel Energy. Learn more by logging
on to www.dsireusa.org, click on “State of
Minnesota Solar-Electric (PV) Rebate Program.”
Definitions
Photovoltaic – derived from “photo” meaning light and “voltaic” meaning electric,
also referred to as (PV).
W – Watt, measure of power for electrical current.
kW – Kilowatt, measure of power for electrical current (1,000 watts). One
kW is enough energy to illuminate ten 100-watt light bulbs.
kWh – Kilowatt-hour, measure of energy use of one kilowatt in one hour. One
kilowatt-hour is equal to keeping ten 100-watt light bulbs lit for one hour.
AC – Alternating current (grid electricity)
DC – Direct current (solar panel or battery electricity)
Grid – A system of power lines used by the power company to distribute power
to the end consumer.
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