Solatube Boost performance and lower attic fan noise with the Solar Star conversion kit. Its ventilator is powered by a 10-watt photovoltaic solar panel and features a brushless motor and five-wing injection molded fan. While it works to maintain low humidity and temperature levels, eliminate wintertime condensation, and reduce attic heat in the summer, the unit has no electrical hookup and no cost to operate. 888.765.2882.