Sonnenschein GF Series Gel (formerly SportLine)This range offers three battery functions combined into one battery: powerful engine start-up, a reliable mains power supply to all on-board outlets, and energy-saving, environmentally friendly storeage of solar energy. The range consists of closed system batteries in which the electrolyte is enclosed in gel. This provides a variety of benefits and advantages. They are maintenance-free throughout their entire service life. In addition,because of the extremely low self-discharge of these batteries, a powerful engine start-up is no problem even when the batteries haven't been used for months. They are extremely low-gassing and no acid vapours are released. They can therefore be installed without hesitation in the interiors of boats where people eat and sleep. And last , but not least, they provide a significant safety advantage. they can operate at any angle and even under water. This means for example that the bilge pump, radio and navigation lights of a boat remain in operation in an emergency. | 
