The Patriot SolarGuard 155 Energizer is ideal for small range acreage settings. The light, compact design with carry handle makes this charger ideal for portability. The unit includes internal battery and solar panel, providing a convenient all-in-one energizer. Energy efficient solar panel charges the internal battery to power the fence line. Flashing red light indicates fencer is working. Solar power recharges the battery as required to support long battery life. Its low impedance design delivers power to the end of the fence even under heavy load (e.g. foliage, undergrowth). It is able to be mounted to T-post or wood post. The battery's large storage capacity enables use up to 21 days with out sunlight. 2 year warranty (includes lightning).