Dividing the watt-hours of a generator by the watts of the devices you plug into it can tell you (even before you buy) how much runtime you’ll get.

Forbes contributors publish independent expert analyses and insights. Dianne Plummer is an Energy Consultant and Certified Energy Manager. Rooftop solar has become one of the fastest-growing clean ...

Solar panel installations are booming – up 22 per cent in the first six months of the year, and there are now more than 1.8 million households with them. But with panels costing thousands of pounds ...