Pole-mounted passive solar tracker for PV modules. Over the course of the day, the fluid in the sunny side cylinder boils, forcing the liquid to condense in the shady side cylinder, causing the modules to shift by gravity and track the sun. There are no motors, pistons or gears to wear out. Increase the power output of a photovoltaic array from 19% to 42% depending on the season and location. The pipe sizes for masts are given in schedule 40 steel pipe (not included). Manual seasonal tilt adjustment. 10 year limited warranty.

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