The Jackery Explorer 500 is the best choice if your budget is limited or you don't need large capacities. This solar generator has a capacity of 518Wh and weighs just 13.3 pounds, making it ideal for use as an electrical backup unit. It can be used with any gadget that produces less than 500W of power. You can easily recharge it through a wall outlet, car outlet, or solar panel. This generator comes with a 2-year warranty which is a nice addition.