Home Depot offers the Grape Solar 100-watt Polycrystalline Solar Panel, model no. GS-Star-100W, for $99.99 with free shipping. That's $10 under our July mention and the lowest total price we've seen. (It's the best deal now by $46.) This solar panel can be used to power RVs, boats, cabins, remote locations, and other small power generation needs. Deal ends December 4.