hg power 12" solar powered exhaust fan with thermostat & speed control | solar shutter vent fan, ac adapter & auto-switch, 40w bifacial panel for shed, greenhouse, chicken coop, attic, garage 12 inch is up for auction in Tools & Home Improvement. The current bid is $17.00, 91% below the $179.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.