Now is the ideal time to invest in portable power, as the cost of generators continues to fall. Around £70 will get you a unit with the same kind of electrical muscle as plugging into the mains. This can transform working in a lock-up or remote workshop, thanks to the potential for lights, power tools and heaters.

There's a choice of two or four-stroke units with a range of power outputs, plus less weighty, more compact inverters. So, which will be the light of your life? We fired up eight to find out.

The test

It's not only about how much electricity each generator delivers, but the way this is supplied, as sharp spikes of power can damage sensitive electronic kit.