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. Key Features 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 DCEuro 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 Applications Campervans, motorhomes, and RVs Marine and boat installations Off-grid cabins and mobile power setups Dual-battery vehicle systems Summary 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.
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