Bestbuy offers Jackery - Explorer 290 Portable Power Solar Generator (290 Wh Capacity) - Black for $170.99 (orig. $249.99) with free shipping. 

Product Description: 
The Jackery Explorer 290 provides 290-Watt hours of power with 200W continuous and 400W peak output to handle your portable power needs, engineered with a rechargeable lithium-ion battery, which provides maintenance-free energy without the hassle of fuel or fumes. It is perfect for indoor and outdoor use. Explorer 290 can also be used for home emergencies when suffering from power outages caused by storms