This solar powered generator is perfect for emergency backup power. It is a gas-free source of portable power to keep lights, phones and laptops powered through any situation. It's your portable, mini powerhouse. The Yeti stores 150 watt hours of power and is easy to use. Recharge several devices at once with 1-USB, 1-12V DC, and 1-AC outputs. Charge via AC wall charger, DC, or up to 4 solar panels (#550871). Solar panels sold separately.