Konrad,
If you assume that your moving PV panel is always in the optimal location to receive the sun, you actually do not even need to run a radiation study. The EPW file contains this data in the directNormalRadiation output. This is the solar energy that is directly normal to the sun angle. The 70% statistic does not seem to be right for Boston. I’m getting something closer to 94% between a dynamic panel tracking the sun and a flat panel oriented horizontally on the ground (globalHorizontalRadiation):
Then again, Boston is really cloudy and I could see the 70% statistic holding in some places like a desert climate
Note that, if the movable panel is not always at the ideal sun angle, you can still model it with Ladybug. You are just going to have to pass a grafted list of 8760 hours into the selectedSkyMtx component and run 8760 radiation simulations using the output data tree.
-Chris
DirectNormalRadiation.gh (370 KB)