Review on BatteryMINDer 244CEC1: 24V 1/2/4 AMP Charger, Maintainer, Desulfator for Trucks, Boats, RVs & Generators by Walter Day

The only 24V charger I've found that gives the correct, safe charge and holds the voltage. Most chargers use excessive gassing voltages and since most batteries are maintenance free and prolonged gassing can be harmful this is what you want and although it is more expensive you will save money in the long run with batteries that last longer. many years longer. It's also very energy efficient, only using 4 or 5 watts on maintenance.