These modules look alot like a standard switchmode power supply, except that they have a key difference. They allow battery backup during a mains failure condition, just like our M 8561 charger. Each model is equipped with 240V AC input, 12V DC output and battery connections. Output short circuit protection, current limiting and over voltage protection, plus over charge and discharge protection for your battery. Battery/power status indicators are provided on board. Ideal for building into custom wall cabinets.