| Item | SMR-MPPT1050/RS485 | SMR-MPPT1575/RS485 | SMR-MPPT2075/RS485 |
| Max Charging Current | 10A | 15A | 20A |
| System Voltage | 12V | 12V/24V automatical recognization |
| Max input power | 130W | 200W/400W | 260W/520W |
| Max volt on Bat. Terminal | 25V | 35V |
| Battery Type | Lithium, Liquid, Gel, AGM (Programmable, default: Gel) |
| Liquid, Gel, AGM | MPPT Charging Voltage | <14.5V@25ºC | <14.5/29V@25ºC |
| Boost Voltage | 14.0~14.8V/28.0~29.6V(Default: 14.5/29.0V@25ºC, Programmable) |
| Equalization Voltage | 14.0~15.0V/28.0~30.0V(Default: 14.8/29.6V@25ºC, Liquid/AGM, Programmable) |
| Float Voltage | 13.0~14.5V/26.0~29.0V(Default: 13.7/27.4V@25ºC, Programmable) |
| Low Volt. Disconnect | 10.8~11.8V/21.6~23.6V; SOC1~5(Default: 11.2/22.4V, Programmable) |
| Reconnect Voltage | 11.4~12.8V/22.8~25.6V(Default: 12.0/24.0V, Programmable) |
| Overcharge Protect | 15.5V | 15.5/31.0V |
| Temp. Compensation | -4.17mV/K per cell (Boost, Equalization), -3.33mV/K per cell (Float) |
| Lithium | Charging voltage target | 10.0~17.0V | 10.0~32.0V (Programmable) |
| Charging voltage recovery | 9.2~16.8V | 9.2~31.8V (Lithium, Programmable) |
| Low voltage disconnect | 9.0~15.0V | 9.0~30.0V (Lithium, Programmable) |
| Low voltage reconnect | 9.6~16.0V | 9.6~31.0V (Programmable) |
| 0ºC Charging protection | Yes, No, Slow(Default: Yes) |
| Max volt on PV terminal *1 | 45V | 55V |
| Dusk/Dawn detect volt. | 3.0~8.0V | 3.0~20.0V (Programmable) |
| Day/Night delay time | 0~30Min (Programmable) |
| MPPT tracking range *2 | (Battery Voltage + 1.0V)~Voc*0.9 |
| Max tracking efficiency | >99.9% |
| Output Current | 10A | 15A | 20A |
| Max charge conversion | 96.5% | 97.5% |
| Communication | Infared/RS485/BT Infared/RS485 |
| Self consumption | 6~8mA |
| Dimensions | 85.8*81*23.1mm | 85.5*145*30mm | 85.5*145*42.5mm |
| Weight | 260g | 600g | 730g |
| Ambient temperature | -35~+60ºC |
| Ambient humidity | 0~100%RH |
| Protection degree | IP67 |