The Battery Saver 48 Volt 50 watt Charger, Maintainer, and Tester features our integrated micro-processor controlled automatic maintaining, automatic PULSE desulfator and modular cabling system. This provides a much more efficient experience when dealing with multiple batteries found in a 48 volt system used in smaller aircraft, RVs, newer golf carts, boats or any other maintaining needs You may have. The power benefit of the 50 watt model is the ability to charge up multiple batteries if they are connected together in Series or in parallel. The advanced computer control will monitor to make sure that no matter the size of the battery, it will be charged safely and efficiently. The modular cabling system is unique to our chargers and maintainers and allows our units to run longer lengths than any other device on the market.