> You should have the most efficient output from the solar panels

At some times of year, or if you live in a very high or low latitude,
tracking can be worthwhile. For example winter, when the sun is
low and the demand for heat and light is greatest. Unfortunately it's
not always practical for a large array, such as one that's mounted
permanently on a roof in a due North or South orientation, as
houses tend to be faced

You can find solar azimuth tables on the web, with a fairly simple
calculation for finding the sun's position during the day at any site
on any date

Joe
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