The Goal Zero Yeti 1250 solar generator silently cranks out big backup power—suitable for big appliances, such as a refrigerator and a freezer, or home health-care equipment. Charge the Yeti 1250 using clean, free solar energy with 2 Boulder 15 solar panels (sold separately) in 20 - 24 hrs.—or charge it from the wall in 16 - 20 hrs. Multiple ports including DC, USB and AC make it easy to power up a wide range of devices; activate the ports with a single master switch. No gas, noise or fumes lets you use the Yeti 1250 indoors or out—wherever a source of power is needed.