Supplied The new solar panels covering the roof of the Frenz building provide all the power it needs. At the end of the month, “you’re next to neutral”, Darby said. “It’s a great feeling knowing you can do that.” On a standard day, the packhouse will use 35–40 kilowatts of power. The panels will produce over 50kW when the sun’s out and 20 on an overcast day. LAWRENCE SMITH/Stuff Frenz director Rob Darby says the company is always looking for ways to be more sustainable. The next step will be getting batteries, so the company can store all the power it makes.