High quality Elmdene 24V DC Boxed Switch Mode Power Supply Units in various Amp outputs. Efficient Switch Mode operation without battery monitoring. 1A, 2A and 3 Amp PSUâs are supplied in a Size âAâ (230mm x 200mm x 80mm) case 4A 5A and Battery Monitored PSUâs are supplied in size âCâ case (330mmWx275mmHx80mmD) *Battery not included.