Maximum Yield USA 2015 January | Page 76

empire of the sun There’s no better place for watching sunlight turn into electricity than a garden—plants, after all, are just living solar panels, capturing light and turning it into the energy that fuels life itself. So there’s a kind of synchronicity in turning to the sun when you need power in the garden. At its simplest, using solar energy is as easy as popping a cloche over a row of winter lettuces to trap and intensify sunshine on frosty days, heating up the ground enough to keep everything growing strongly. But photovoltaic technology is becoming so sophisticated and versatile that nowadays we can harness the sun’s help for dozens of garden applications, from raising seedlings to lighting a path to powering the drill you use to build raised beds. At the moment, the default setting for powering everything from heated propagators to the radio you listen to while you’re working in the greenhouse is conventional electricity or batteries—plug it in, flick a switch and you’re cooking. But that’s like getting out the Chevy to drive the two-minute walk to the store. There’s a mismatch between what you need to do, and what you’re doing it with. In a garden, where you use a relatively small amount of electricity at intermittent intervals, you have all the energy you require already installed, and it’s shining out of the sky onto your head. photovoltaic solar panels operate on light, not sunshine, and light still reaches the ground even when it’s cloudy, though usually at lower concentrations.” 74 Maximum Yield USA  |  January 2015