Patriot SolarGuard 50 Energizer 0.05 Joule The Patriot SolarGuard 50 is a low impedance energizer designed to deliver power to the end of the fence even under heavy load e.g. foliage, undergrowth. It is ideal for small range acreage settings, residential yards, vegetable or flower gardens and can be used with wire or tape. The light compact design with carry handle makes it ideal for portability. The unit includes an internal battery and solar panel, providing a convenient all-in-one energizer.