SRNE 3 in 1 Charger AC DC MPPT
SRNE 3 in 1 Charger AC DC MPPT
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The SRNE SAA1250 3-in-1 Battery Charger combines MPPT solar charging, DC-DC alternator charging and 230V mains battery charging in one integrated unit. Designed for campervans, motorhomes, caravans and off-grid electrical systems, it provides a convenient way to maintain leisure batteries from multiple power sources without installing three separate chargers.
The integrated 50A MPPT solar charge controller maximises the energy harvested from connected solar panels, supporting solar arrays up to 700W on a 12V battery system. Maximum Power Point Tracking technology continually adjusts the solar operating point to make efficient use of available sunlight, particularly during changing weather conditions.
When travelling, the built-in DC-DC battery charger regulates power from the vehicle's alternator to charge the leisure battery. It supports suitable conventional and smart alternator systems, providing controlled battery charging rather than simply connecting the starter and leisure batteries together.
When connected to a suitable 230V mains supply, the SAA1250 operates as an AC battery charger, delivering up to 50A of charging current to a 12V leisure battery. Its intelligent charging management supports multiple operating modes, allowing solar, alternator and mains power to be used according to the installation and available charging sources.
The charger supports lithium and lead-acid leisure batteries, including compatible LiFePO4, AGM and GEL batteries. Built-in Bluetooth allows charging information and supported settings to be accessed through the SRNE mobile app without requiring an additional Bluetooth module.
With dual-battery charging management, multiple communication interfaces and compatibility with the wider SRNE Eco System, the SAA1250 provides a versatile charging solution for modern campervan and motorhome electrical installations.
Features
• Combines MPPT solar, DC-DC alternator and AC mains charging in one unit
• Suitable for 12V and 24V leisure battery systems
• Up to 50A MPPT solar charging for 12V batteries
• Supports solar arrays up to 700W on 12V systems
• Maximum solar panel open-circuit voltage of 65V DC
• Up to 50A mains battery charging on 12V systems
• Intelligent DC-DC charging from suitable vehicle alternators
• Compatible with lithium, LiFePO4, AGM, GEL and flooded lead-acid batteries
• Built-in Bluetooth for smartphone monitoring and configuration
• Multiple charging modes for flexible power management
• Supports starter battery maintenance charging in compatible configurations
• MPPT tracking efficiency greater than 99%
• Maximum charging conversion efficiency of 96%
• TTL, RS485 and CAN communication interfaces
• Compatible with the wider SRNE Eco System
• Integrated electrical protection functions
• Reduces installation space compared with three separate chargers
Technical Specifications
General
• Manufacturer: SRNE
• Model: SAA1250
• Product type: 3-in-1 MPPT, DC-DC and AC battery charger
• Rated leisure battery voltage: 12V / 24V DC
• Leisure battery voltage range: 9–32V DC
• Supported battery types: Lead-acid, lithium and user-defined
• MPPT tracking efficiency: Greater than 99%
• Maximum charging conversion efficiency: 96%
• Bluetooth: Built-in
• Communication interfaces: TTL / RS485 / CAN
• Operating temperature: -35°C to +65°C
• Maximum operating altitude: 3000m
• Protection rating: IP43 electronic components / IP22 wiring terminals
MPPT Solar Charging
• Maximum PV open-circuit voltage: 65V DC
• MPPT operating voltage range: 15–50V DC
• Maximum PV input current: 50A
• Maximum solar input power: 700W at 12V
• Rated solar charging current: 50A at 12V / 25A at 24V
DC-DC Alternator Charging
• Starter battery system voltage: 12V / 24V DC
• Starter battery type: Lead-acid
• Rated alternator charging current: 50A at 12V / 25A at 24V
• Maximum alternator input current: 65A
• Charging technology: Buck / boost conversion
• Smart alternator compatibility: Supported with appropriate installation and configuration
AC Mains Charging
• AC input voltage: 90–265V AC
• AC input frequency: 45–65Hz
• Rated mains charging current: 50A at 12V / 25A at 24V
• Suitable for compatible 230V mains hookup installations
Dimensions & Weight
• Dimensions (unboxed): 255 × 196 × 90mm
• Net weight (unboxed): 4.5kg
Installation Information
The SRNE SAA1250 is installed between the vehicle's alternator or starter battery supply, solar panel array, mains electrical supply and leisure battery. Its integrated charging functions regulate power from the available sources according to the selected operating mode.
Correct cable sizing, suitable fuses, electrical isolation and appropriate circuit protection are essential. The mains input must be installed in accordance with applicable electrical safety requirements and the manufacturer's instructions.
For lithium leisure batteries, the charging parameters should be configured according to the battery manufacturer's recommendations. The installation must also account for the battery's maximum permitted charging current and Battery Management System (BMS) limits.
The SAA1250 can operate independently or be integrated with compatible SRNE Eco System equipment for expanded monitoring and control.
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Frequently Asked Questions
The SRNE SAA1250 combines three battery charging functions in one unit: MPPT solar charging, DC-DC alternator charging and AC mains charging. It allows campervan and motorhome leisure batteries to be charged from solar panels, the vehicle's electrical system and a suitable 230V hookup supply without requiring three separate chargers.
Yes. The SAA1250 supports LiFePO4 lithium leisure batteries, along with compatible AGM, GEL and flooded lead-acid batteries. Its configurable charging parameters allow the charging profile to be adjusted to suit the battery manufacturer's requirements.
The SAA1250 supports charging from suitable conventional and smart alternator systems. Its DC-DC charging circuitry regulates power supplied to the leisure battery, although correct installation and configuration are essential for vehicles fitted with variable-voltage smart alternators.
The SAA1250 supports solar arrays up to 700W on a 12V battery system, with a maximum PV open-circuit voltage of 65V DC. Solar panels can be connected in suitable configurations, provided the combined voltage and current remain within the controller's specified limits.
Yes. The SRNE SAA1250 features built-in Bluetooth connectivity, allowing users to monitor charging performance and adjust supported settings through the compatible SRNE smartphone app. No separate Bluetooth module is required for this functionality.
Yes. The SAA1250 supports multiple charging modes, including configurations that use solar and alternator power together. The charger manages the available sources according to its operating mode, battery requirements and electrical limits.
Yes. The SAA1250 includes dual-battery charging management and supports starter battery maintenance charging in compatible configurations. This can help maintain the vehicle's starter battery when suitable charging conditions are available.
Yes. The SAA1250 supports integration with compatible SRNE Eco System components, including the CU2 Control Unit and RMA7 touchscreen. This allows supported charging information to be incorporated into a centralised campervan or motorhome electrical monitoring system.
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