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 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

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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Collection: SRNE Multi Function MPPT

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