The S40 LE is the ultimate mobile energiser for short fences up to 15 km (single wire, no vegetation). The energiser is supplied with a rechargeable battery and solar panel. The S40 LE is quick and easy to install and convenient to transport. This robust and highly mobile energiser offers an excellent alternative to battery-powered systems. In addition, this energiser has a mains charging function, allowing the energiser to be charged from mains power when there is insufficient sunlight or during storage. Top features of the Gallagher S40LE: Solid magnetic switch: conventional switches are often susceptible to dirt and moisture. The robust switch prevents the ingress of water and dirt. Light and handy: the unit is easy to transport and install anywhere. Daylight: the term "solar device" may be a little misleading, because this device also works perfectly in normal daylight (without sun). What's more, it even works for up to 3 weeks without direct sunlight!