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- The red lines in this image show the actual energy generated during a cloudless day near the autumnal equinox. The area under this curve corresponds to 15.6 kWh.
- The dashed yellow lines (from left to right) indicate 9:30am (when the shadow of the dormer left the panels on the west side), 1pm (when the sun was due south), and 4:30pm (when the tree's shadow reached the roof).
- The black curve represents my theoretical estimate of the energy that could have been generated under ideal, unshaded conditions. The area under this curve corresponds to 17.6 kWh.
Summary:
| Condition | Energy | Percent of
Theoretical |
| Theoretical | 17.6 kWh | 100% |
| Actual | 15.6 kWh | 88.7% |
Dormer Shading
(morn + eve) | 0.7 kWh | 3.7% |
| Maple Tree Shading | 0.3 kWh | 1.5% |
| Flat-top Effect | 1.1 kWh | 6.1% |