SAJ B2 Series Battery System
Install SAJ B2 Series Battery System in Sydney with Greenlight Solar. Engineered for Australian homes and businesses, this modular, high-voltage lithium-iron-phosphate (LiFePO₄) battery system offers scalable energy storage solutions ranging from 5.12 kWh to 25.6 kWh. Whether you’re aiming to maximise solar self-consumption, reduce electricity bills, or ensure backup power during outages, the SAJ B2 Series delivers reliable and efficient performance. For a detailed performance breakdown, check out our full SAJ Battery Review
Key Features & Benefits
- Modular & Scalable – Expand from 5.12 kWh up to 25.6 kWh.
- Space-Saving Design – Supports wall-mounted and floor-standing setups.
- LiFePO₄ Battery Technology – Safe, reliable, and thermally stable.
- Long Lifespan – Over 6,000 charge cycles at 80% DoD.
- High Efficiency – Up to 90% usable capacity with stable power output.
- Smart BMS – Real-time monitoring with built-in safety protections.
- Remote Firmware Updates – Always up-to-date with the latest features.
- Weather-Resistant – IP65-rated durable casing for Australian conditions.
Technical Specifications – SAJ Home Battery System
SAJ B2 Series – High-Voltage Modular Battery
The SAJ B2 Series is a scalable and modular battery system ideal for homes and businesses with growing energy demands. Starting with a single 5.12kWh module, you can expand the storage capacity up to 25.6kWh by stacking up to five modules.
Key Specifications:
- Usable Capacity: 5.12kWh per module (up to 25.6kWh with five modules)
- Nominal Voltage: 102.4V per module (scales up to 512V with five modules)
- Battery Type: LiFePO₄ (Lithium Iron Phosphate)
- Depth of Discharge (DoD): Up to 90%
- Cycle Life: 6,000+ cycles at 80% DoD
- Efficiency: ≥95% energy conversion
- Charge/Discharge Power: Starts at 2.5kW per module, scales up to 12.5kW with five modules
- Protection Rating: IP65 (ideal for indoor or outdoor installations)
- Battery Management System: Real-time monitoring with built-in safety protections
- Firmware: Over-the-air (OTA) remote updates supported
- Mounting Options: Wall-mounted or floor-standing
The B2 Series is perfect for homeowners looking for flexibility, higher capacity, and long-term energy independence.
The SAJ B2 Series is a modular high-voltage battery system designed for modern solar energy storage. Available in five scalable configurations, it provides flexible capacity options for residential and light commercial use. Below is a detailed breakdown of each configuration:
SAJ HS2 Series – All-in-One Hybrid Battery System
The SAJ HS2 Series combines a solar inverter and battery storage into one compact system, making it a smart solution for homes that need a reliable, easy-to-install energy storage setup. It comes in both single-phase and three-phase models.
Key Specifications:
- Storage Capacity: Up to 18kWh (single-phase) and 22.5kWh (three-phase)
- Supported Models: HS2-3K-S2 to HS2-6K-S2 (single-phase) / HS2-5K-T2 to HS2-10K-T2 (three-phase)
- Battery Type: LiFePO₄ (Lithium Iron Phosphate)
- Depth of Discharge (DoD): Up to 93.75%
- Protection Rating: IP65 dustproof and waterproof enclosure
- Backup Power Switching: Less than 10 milliseconds during blackout events
- Safety Features: AFCI (Arc Fault Circuit Interrupter) and RSD (Rapid Shutdown Device) support
- Cooling System: Natural convection cooling for silent operation
- Integration: Seamless connection with SAJ hybrid inverters
The HS2 Series is ideal for households wanting a compact hybrid solution with fast backup power and high storage capacity.
SAJ B1 Series – Compact Residential Battery
The SAJ B1 Series is a compact, entry-level modular battery system designed for smaller energy storage requirements or retrofitting existing solar setups. Each unit offers around 5.1kWh usable capacity and can be scaled by connecting multiple modules in parallel.
Key Specifications:
- Usable Capacity: 5.1kWh per module (stack up to 8 modules in parallel)
- Battery Type: LiFePO₄ (Lithium Iron Phosphate)
- Depth of Discharge (DoD): Up to 90%
- Cycle Life: 6,000+ cycles
- Protection Rating: IP65 (dust and water resistant)
- Communication: Supports CAN and RS485 protocols
- Safety Features: Overcurrent, short circuit, over-voltage, overheating, and overcharge protection
- Dimensions: ~650mm × 410mm × 186mm
- Weight: ~50kg per module
The B1 Series is perfect for smaller homes or those looking to add storage to an existing solar setup without a full hybrid system.
Battery Modules Overview
Model |
B2-5.0-HV1/HV5 |
B2-10.0-HV1/HV5 |
B2-15.0-HV1/HV5 |
B2-20.0-HV1/HV5 |
B2-25.0-HV1/HV5 |
No. of Modules |
1 |
2 |
3 |
4 |
5 |
Rated Energy (kWh) |
5.0 |
10.0 |
15.0 |
20.0 |
25.0 |
Usable Energy (kWh) |
4.5 |
9.0 |
13.5 |
18.0 |
22.5 |
Rated Power (W) |
3,072 |
6,144 |
9,216 |
12,288 |
15,360 |
Dimensions (H x W x D) mm |
261 × 626 × 365 |
522 × 626 × 365 |
783 × 626 × 365 |
1044 × 626 × 365 |
1305 × 626 × 365 |
Weight (kg) |
50.5 / 52.5 |
101 / 105 |
151.5 / 157.5 |
202 / 210 |
252.5 / 262.5 |
Nominal Voltage (V) |
102.4 |
204.8 |
307.2 |
409.6 |
512 |
Operating Voltage (V) |
89.6–115.2 |
179.2–230.4 |
268.8–345.6 |
358.4–460.8 |
448–576 |
Max Charge/Discharge Current (A) |
30 |
30 |
30 |
30 |
30 |
Ideal Applications
- Residential Homes: Optimise solar energy usage, reduce grid dependency, and ensure backup power during outages.
- Small Businesses: Manage energy costs effectively and maintain operations during power interruptions.
Off-Grid Systems: Achieve energy autonomy in remote locations without reliable grid access.
Certifications & Compliance
- Safety Standards: Complies with IEC 62619, UN38.3, and other international safety standards, ensuring reliable operation.
CEC Approval: Recognised by the Clean Energy Council, qualifying for various Australian solar rebates and incentives.
Eligible Households Can Be Qualified For Rebates Up To $10,000 On Solar Battery Installation!
Frequently Asked Questions
The usable capacity of the SAJ B2 battery is 4.5 kWh per module. A fully scaled 5-module system provides up to 22.5 kWh of usable energy.
Yes, the SAJ B2 battery is best used with SAJ hybrid inverters but may be compatible with other inverter brands that support high-voltage lithium battery integration via CAN communication. Always confirm compatibility with your installer.
The SAJ B2 battery is rated for over 6,000 charge cycles at 80% depth of discharge, giving it an estimated lifespan of 10–15 years under normal usage.
Yes, the SAJ B2 battery has an IP65 rating, making it weather-resistant and suitable for outdoor installation.
You can install up to five modules in a single system, providing a maximum rated capacity of 25.0 kWh and 22.5 kWh of usable energy.
Yes, when paired with a compatible hybrid inverter and backup circuit, the SAJ B2 battery can supply power to essential loads during a blackout.
The nominal voltage of the SAJ B2 battery varies by system size, ranging from 102.4V (1 module) to 512V (5 modules).
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