There’s a number of small portable solar chargers available which are designed to keep mobile gear such as MP3 players and mobile phones powered up when there’s no electrical outlet around. But with people cramming more and more devices on their person or in their cars when heading off the grid, we're seeing a growing number of larger and more powerful units designed for more power hungry devices. The latest is thid portable solar-powered generator from Wagan Tech which provides 1,500 watts of power for seven to eight hours.

Intended as the perfect accessory for campers, hunters and RVers, Wagan Tech’s generator is small enough to throw in the boot and has wheels to make it easy to transport from the car to the campsite – although you’ll probably want the campsite and the car in pretty close proximity. The unit comes fully assembled with one 12-volt battery – with the option of adding two more – and folds open to display five solar panels – again, with the option of adding two more.

Wagan Tech had a unit on display at CES 2011 and said, in its basic form – one 12-volt battery and five solar panels – it would supply 1,500 watts of power for seven to eight hours. A spokesman said the company was still tweaking the design, but was aiming for a Q2 2011 release date and a price of around US$1,100.