Solutions / Rex
REX
The ALFA REX delivers efficient, compact energy storage for homes seeking reliable backup and smart energy management. Combining a robust 4 kVA inverter and 12 kWh LiFePO₄ battery, it offers dependable off-grid operation, cost-saving peak-time usage, and real-time monitoring via mobile app.
Backup Setup: When the grid is connected, the battery automatically charges and stays ready to power your home when grid supply fails. Reliable and automatic <6milli-secconds switchover ensures peace of mind during outages.
Grid + Solar Setup: For solar integration, an extra MPPT is required during setup to boost solar input. The system then uses both grid and solar, charging the battery during off-peak hours and optimizing usage during peak times for better savings. Mobile app option to choose when to consume from grid or battery or the solar—all app automated.
Designed for modern living, the REX features a durable IP55-rated galvanized steel enclosure and supports both wall and floor installation. Its advanced battery chemistry enables 8000+ cycles at 80% depth of discharge, with 80 A charge/discharge capability and 4 kW single-phase AC output at over 97% efficiency. Seamless communication (WiFi, CAN) and a 12-year warranty ensure lasting performance and peace of mind.
DOES NOT support On Grid production
Technical specifications
- MSolar production capacity :N/A
- Continuous power output: 4kva
- Nominal voltage: 240 VAC
Depth 150 mm
Width 750 mm
Height 1100 mm
Weight 145 kg
Warranty
The REX All-in-One is covered by a 10-12‑year limited warranty.
View warranty
Details
- 12‑year limited warranty
- Controls safe connectivity to the grid
- Automatically detects grid outages
- Provides seamless transition to backup
- Uses control cable for wired communication
- Connects to the load or service equipment side of the main load panel
- Centered mounting brackets support single‑stud mounting
- Enables backup for solar and solar + battery configurations
- System Shutdown Switch to disconnect PV, battery, and generator systems
- When paired with the Alfa Spark Gateway, homeowners are able to prioritize and direct power to critical loads during a grid outage, ensuring essential appliances remain powered.
- Power Control System (breakers) feature to control solar and storage operation based on passthrough limit rating
- Required for Sunlight Jump Start
Training
ALFA training for installers is actively expanding into key regions and will primarily require only basic electrical knowledge to get started..
Visit ALFA Installers page
What’s in the box
- REX All-in-One
- Wall‑mounting Bracket
- Accessory Kit
- Pre Installed 4 Pole Circuit Breaker
Compatibility
- REX expansion packs(coming soon..)
- Most recongised mppt cgare controller
- ALFA Spark comms/ Gateway
- ALFA Comms Kit
Documentation
- – Last updated on
- DATASHEET
Use recommendation
- Commercial – YES
- Residential – YES
- Industrial – N/T
- Agricultural – N/A
- Institutional – YES
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