Switched power supply prepared for battery connection (with safety backup) in grid box with wired connectors. Size: 110 x 36 x 78 [+/- 2 mm]. Input = 176-264VAC, Output = 13.8VDC / 3Amp + 0.5Amp for battery. SCP (Short Circuit Protection), OLP (Overcharge Protection), OVP (Over Voltage Protection), UVP (Battery Deep Discharge Protection). Optical LED signaling.