REI offers the Goal Zero Yeti 1250 Solar Generator for $1,279.49. (Amazon has it for a few cents more.) Opt for in-store pickup to dodge the $35 shipping charge. That's the lowest price we could find by $321, although we saw it for $200 less last October. Meant for powering things like lights, tools, refrigerators, freezers, and health care equipment, this generator can be charged via solar panel (not included), wall outlets, or 12-volt adapter.