The production of electricity from a solar photovoltaic (PV) array is, obviously enough, dependent on access to sunlight. Direct, unobstructed sunlight is optimum. If the array is of fixed design (not tracking the sun), the production of energy on a clear day, if expressed in a graph, will form of a curve that mirrors the very arc of the sun as it climbs and crosses the sky from sunrise to sunset.
Most
PV arrays, including mine, monitor and report data relative to equipment function
and energy production. Among other
things, my system can provide a graph featuring power production for the entire
day. The graph is comprised of bars
representing fifteen-minute increments.
To
illustrate the direct relationship between the sun’s track across the sky and
energy production, I am posting a track of the sun plotted through the sky
followed by a graph featuring a full day of energy production from my PV array.
For
the sake of making this more interesting, the power production graph I chose represents
August 21, 2017. On that day, a solar
eclipse temporarily threw shade across Montana and eroded production on an
otherwise sunny day.
Sun
Track
PV System
Output (With an Eclipse)
—Mitchell
Hegman
Sunrise to Sunset:
(https://sunrise-sunset.org)
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