| Item | Max20-EU | Max30-EU | Max40-EU |
| Max Charging Current | 20A | 30A | 40A |
| System Voltage | 12/24V automatic recognition |
| Max volt on Bat. terminal | 35V |
| Battery Type | Gel, AGM, Liquid, Lithium(default: Gel) |
| Gel, AGM, Liquid | Fast Charging Voltage | before boost or equalization charging stage |
| Boost Voltage | 14.5/29.0V @25ºC |
| Equalization Voltage | 14.8/29.6V @25ºC(Liquid, AGM) |
| Float Voltage | 13.7/27.4V @25ºC |
| Low Volt. Disconnect | 10.8~11.8V/21.6~23.6V(default: 11.2/22.4V) |
| Overcharge Protect | 15.8/31.3V |
| Temp. Compensation | -4.17mV/K per cell (Boost, Equalization), -3.33mV/K per cell (Float) |
| Lithium | Charging target voltage | 10.1~32.0V(Lithium, default: 14.4V) |
| Low voltage disconnect | 9.0~30.0V(Lithium, default: 10.6V) |
| Max volt on PV terminal *1 | 25V/50V |
| Dusk/Dawn detect volt. | 8.0/16.0V |
| Output Current | 20A | 30A | 40A |
| Load mode | Always on(Default) , Street lamp, User-defind Mode |
| Dimensions | 189*96*53mm |
| Weight | 420g |
| Self consumption | 8mA/12mA |
| Grounding | Common Positive |
| Power terminals | 8AWG(10mm²) |
| Ambient temperature | -20~+50ºC |
| Storage temperature | -25~+80ºC |
| Ambient humidity | 0~100%RH |
| Protection degree | IP32 |
| Max Altitude | 4000m |