The SRNE MD1250N05 is a high-efficiency, multi-stage DC-DC charger and MPPT solar charge controller designed for dual-battery systems in vehicles, boats, and off-grid applications. It intelligently manages power from both solar panels and a vehicle alternator or generator, ensuring that the auxiliary battery is charged safely, efficiently, and reliably under all conditions.
Dual Input Charging: Accepts power from both alternator and solar sources, charging the auxiliary battery independently from the starter battery.
MPPT Solar Technology: Utilises advanced Maximum Power Point Tracking to extract the maximum possible power from solar panels, improving overall charging efficiency by up to 98%.
Multiple Charging Modes: Supports solar charging only, alternator charging only, or simultaneous charging from both sources.
Automatic Battery Detection: Compatible with standard and smart alternators, making it ideal for modern vehicles.
Multi-Chemistry Support: Works with Sealed, Gel, Flooded, and Lithium (LiFePO₄) batteries, with user-customisable charging parameters.
Comprehensive Protection: Built-in safeguards against overvoltage, overcurrent, overheating, reverse polarity, and night-time reverse charging.
Compact & Efficient Design: Fanless cooling, ultra-low standby power consumption (<0.6 W), and durable IP32 enclosure for reliable performance.
| Specification | MD1230N05 | MD1250N05 |
|---|---|---|
| PV INPUT | ||
| Max. Voltage of Open Circuit | 55V DC | |
| MPPT Voltage Range | 17–36V DC | |
| Max. PV Input Current | 30A | 50A |
| Max. PV Input Power | 400W | 700W |
| HOUSE BATTERY | ||
| Battery Type | Lead-acid / Li-ion / User Defined | |
| Rated Battery Voltage | 12V DC | |
| Battery Voltage Range | 9–16V DC | |
| Max. MPPT Charging Current | 30A | 50A |
| STARTER BATTERY | ||
| Battery Type | Lead-acid | |
| Rated Battery Voltage | 12/24V DC | |
| Max. Alternator Input Voltage | Conventional Alternator: 13.2–16V DC / 26.4–32V DC Euro 6 Standard Alternator: 12–16V DC / 24–32V DC |
|
| Alternator Charging Mode | Buck, Boost | |
| EFFICIENCY | ||
| MPPT Tracking Efficiency | >99% | |
| Max. Charging Conversion Efficiency | 96% | |
| GENERAL | ||
| Weight | 1.92kg | 2.34kg |
| Dimension (L×W×H) | 221×175.8×73mm | 221×175.8×92.4mm |
| Protection Degree | IP32 | |
| Operating Temperature Range | -35°C to +65°C (-31°F to +149°F) | |
| Communication | TTL, Bluetooth, RS485, CAN | |
| CERTIFICATION | ||
| Compliance | IEC62109 / IEC61000 / FCC sDoC / RoHS | |
Campervans, motorhomes, and RVs
Marine and boat installations
Off-grid cabins and mobile power setups
Dual-battery vehicle systems
The SRNE MD1250N05 combines intelligent charging control with powerful MPPT solar optimisation, ensuring efficient battery management wherever you go. Designed for reliability and simplicity, it’s the perfect solution for maintaining fully charged leisure or auxiliary batteries in any off-grid environment.
