Sunlight is free, but the gear that transforms it into electricity is pricey. For 134 low-income D.C. households this year, though, the Solar Advantage Plus Program will make a photovoltaic system ...

With fast mode and off-peak mode, the charger can be powered by surplus solar power ... type A+ 6 mA DC fault protection saves the cost of installing an extra 6 mA DC RCD, while its smart load ...