About SAJ
In 2005, SAJ was established. Guangzhou Sanjing Electric Co. LTD is its full name. I’m happy they shortened that to SAJ, though I’m not sure how they did it.
The business is situated in Guangzhou City. Although my grandparents called this city Canton, try not to use that name if you want Chinese people to understand what you mean. Guangzhou Science City, which sounds like something from a comic book, is the exact location of SAJ. In reality, tech-focused businesses use it as an industrial area. I don’t know if there are superheroes protecting it or not.
What is the SAJ Battery?
The SAJ Battery is a lithium-ion energy storage system that works with your solar panels and inverter to save excess energy produced during the day. Instead of sending that power back to the grid, you can store it and use it later—cutting down your electricity costs and giving you peace of mind.
This battery is ideal for:
- Residential homes with rooftop solar
- Small businesses looking to cut energy costs
- Off-grid or hybrid systems
- Backup power during outages
Key Features of SAJ Battery
Here’s why Australians love the SAJ Battery:
1. Smart Energy Management
SAJ batteries come with an advanced battery management system (BMS) that automatically controls charging and discharging. This helps you get the best performance and battery life.
2. High Efficiency
You get more usable power from your solar panels with up to 95% efficiency. It reduces waste and maximises savings.
3. Safe and Reliable
Equipped with multi-layer protection, SAJ Batteries are safe from overheating, short circuits, and overcharging. They are tested to meet Australian safety standards.
4. Easy Installation
The SAJ Battery is made to be easy to install with most solar systems in Australia. Our expert team at Aussie Solar Tech will help you set it up quickly and safely.
SAJ Battery Series in Australia
SAJ offers smart and reliable residential energy storage solutions for Australian homes and small businesses. Its current range includes the HS2 All-in-One Energy Storage System, the latest HS3 6-in-1 Home Energy Storage System, and the modular B2 HV and B2S HV Battery Series.
The B2 and B2S ranges use safe LiFePO₄ battery technology and stackable designs for flexible capacity expansion. The HS2 and HS3 systems combine battery storage, hybrid inverter technology, backup power and smart energy management in integrated solutions.
At Aussie Solar Tech, we supply and professionally install SAJ energy storage systems, helping customers reduce electricity costs, maximize solar energy use and improve energy independence.
SAJ HS3 All-in-One Home Energy Storage System
The SAJ HS3 is a 6-in-1 smart home energy storage system that combines a solar inverter, EV AC charger, battery PCS, 5 kWh BU3 battery modules, backup power and an Energy Management System in one integrated solution.
The HS3 is available in single-phase and three-phase configurations, with current system capacities ranging from 5 kWh to 40 kWh. Its modular design allows homeowners to expand the battery capacity as their energy needs grow.
HS3 Models
- Single-Phase: HS3-5K-S2-W-PX-AU and HS3-6K-S2-W-PX-AU
- Three-Phase: HS3-5K-T2-W-PX-AU, HS3-8K-T2-W-PX-AU and HS3-10K-T2-W-PX-AU
Battery Module: BU3-5.0-TV1/2-PRO-AU, 5 kWh per module
Key Features
- Built-in DC/DC optimiser
- AI-powered smart energy management
- Whole-home backup support
- IP65 protection
- Operating temperature from -30°C to 50°C
- Self-heating and integrated fire-protection system
- Ultra-slim 170 mm design
- Plug-and-play installation
SAJ Battery HS2 Series – Three-Phase Hybrid All-in-One Solution
The SAJ HS2 Series is a complete solar and battery solution for homes and businesses with three-phase power. It includes models like HS2-(5-10K)-T2 and HS2-(3-6K)-S2, combining a hybrid inverter with expandable lithium battery storage. SAJ calls their all-in-one batteries “HS2 Series”. It comes in different models to fit your power needs:
Key Features of HS2 Series:
- All-in-One Hybrid System
Inverter + Battery + Management system in one compact unit
- UPS Function (Uninterrupted Power Supply)
Switches to backup in less than 10ms during a blackout
- Modular & Expandable
Start from 5kWh and expand up to 25kWh
- Outdoor IP65 Rated
Built to last in harsh Australian weather
- Easy Installation
Pre-wired and quick to set up
- High Power Input
Supports up to 16A input current – ideal for large solar panels
- 100% Three-Phase Support
Manages voltage imbalance for stable performance
- Advanced Lithium Battery (LiFePO4)
Safe, long-lasting, and efficient battery technology
SAJ Battery B2 Series High & Low Voltage Battery
SAJ Battery B2 Series-HV is a smart and powerful high-voltage lithium battery system designed to meet modern solar energy needs. It is ideal for both residential and commercial solar setups. It works seamlessly with hybrid inverters to provide stable and efficient energy storage, helping users reduce electricity bills and increase solar energy usage. The pack of B2 Battery contains battery modules and a BMS controller. The number of battery modules can be flexibly matched according to the user’s power demand, and up to 5 modules can be connected (25.0kWh).
It comes in different models to fit your power needs:
Key Features of B2 Series:
- Battery Type LiFePO4
- Remote firmware upgrade
- IP65 outdoor design
- Easy Installation
SAJ B2S HV Battery Series
The SAJ B2S HV Battery Series is available in two generations for different energy storage requirements.
The earlier generation uses 5 kWh BU2-5.0-HV1-S and BU2-5.0-HV5-S battery modules and supports capacities from 5 kWh to 25 kWh per stack. Up to eight stacks can be connected in parallel, allowing the system to expand to a maximum capacity of 200 kWh. It also supports a 1C charge and discharge rate.
The latest generation uses 6.4 kWh BU2-6.4-HV1-S and BU2-6.4-HV2-S battery modules and supports capacities from 12.8 kWh to 51.2 kWh per stack. It offers 100% depth of discharge, more than 6,000 battery cycles and rated power of up to 25.6 kW per stack.
Key Features
- High-voltage modular battery system
- Stackable design for flexible capacity expansion
- Safe LiFePO₄ battery technology
- IP65 protection for indoor and outdoor installation
- Remote firmware upgrades
- Quick and flexible installation
- Suitable for residential and small-business energy storage
SAJ Battery Price in Australia (May 2026 Updated Cost)
| Battery Capacity |
Approx. Price (AUD) |
| 5 kWh |
$4,148* |
| 10 kWh |
$4,796* |
| 15 kWh |
$5,565* |
| 25 kWh |
$6,825* |
| 30 kWh |
$8,290* |
| 40 kWh |
$10,990* |
| 50 kWh |
$13,190* |
At Aussie Solar Tech, we proudly supply and install top-quality SAJ solar battery systems across Australia. These batteries are designed to help homeowners and businesses reduce energy bills, store excess solar energy, and provide reliable backup power during blackouts.
SAJ B2 Series lithium batteries feature a modular and stackable design, ensuring flexible installation and high performance. SAJ battery systems Price Start From approximately A$4,148 for the 5 kWh system, while the 10 kWh SAJ battery price is approximately A$4,796. The 15 kWh SAJ battery price is approximately A$5,565, while the 25 kWh SAJ battery price is approximately A$6,825.
For larger energy storage needs, the 30 kWh SAJ battery price is approximately A$8,290, the 40 kWh SAJ battery price is approximately A$10,990, and the 50 kWh SAJ battery price is approximately A$13,190.
* Final price may varies based on location, installation requirements. Contact us for a personalized quote and expert advice.
SAJ Solar Batteries — Quick pros & cons
Affordable entry-level pricing — among the lowest $/kWh in market
Warranty throughput is lower than many premium alternatives
Modular and stackable design up to 25.6kWh
Shorter history in Australia, with lower market presence than other major brands
IP65 rating — suitable for outdoor installs
No advanced safety systems (e.g., fire suppression, active cooling)
All-in-one HS2 series simplifies installation for new systems
Limited compatibility outside SAJ ecosystem
SAJ Battery Smart Monitor – Easy Energy Monitoring for Smarter Solar Use
The SAJ Battery Smart Monitor is a user-friendly tool designed to help you track and manage your solar energy usage in real-time. It connects with your SAJ inverter and battery system to show live data such as power generation, battery charge level, energy consumption, and grid interaction. You can view all this information directly from your smartphone or computer.
With the SAJ Smart Monitor, you can:
✅ Monitor your system 24/7 – Check how much solar power you’re generating and using.
✅ Track battery status – See how much energy is stored or being used.
✅ Reduce electricity bills – Use insights to optimize your energy usage and save money.
✅ Easy to use – Clean dashboard, available on the SAJ App and Web Portal.
✅ Get alerts & reports – Receive system notifications and performance summaries.
SAJ Battery Warranty for Australian Customers
SAJ batteries come with a 10-year product and performance warranty for the B2, BU2, AS2, and HS2 series. The warranty guarantees that t he battery will retain at least 70% of its nominal capacity at the end of 10 years, which aligns with common industry standards. SAJ also applies a throughput limit of approximately 3.06 MWh per usable kWh over the warranty period. While this throughput is lower compared to some premium brands, SAJ batteries remain eligible for Australian rebates and are supported by SAJ’s local Australian service team, offering reliable coverage and peace of mind.
Why Buy SAJ Battery from Aussie Solar Tech?
At Aussie Solar Tech, we are committed to bringing the best solar products to Australian homes and businesses. We are proud to provide: Competitive Prices, Professional installation by certified solar experts, Full system setup & after-sales support in Australia, Fast Delivery and Genuine Products. Aussie Solar Tech offers Saj Solar Battery installation and sales across major Australian cities:
- Canberra
- NSW
- Melbourne
- Queensland
No matter your location, our experienced team ensures a smooth and efficient installation process, tailored to your unique energy needs. Our team is always ready to help you choose the right battery based on your solar usage and budget.
Call Us Now
Ready to upgrade your solar system with the SAJ Battery? Don’t wait! Call us today to talk with our friendly experts. We’ll help you choose the best battery for your home or business and guide you through the easy installation.
The Most Common Questions About SAJ Solar Batteries
1. Who makes SAJ batteries?
SAJ batteries are made by SAJ Power, a Chinese company specializing in solar inverters and energy storage.
2. Are SAJ solar batteries any good?
Yes, SAJ batteries are reliable, cost-effective, and suitable for small to medium households.
3. Which inverter is better, SAJ or Growatt?
Both are good, but Growatt inverters are generally more popular for performance and advanced features.
4. What is the warranty on SAJ batteries?
SAJ batteries typically come with a 5–10 year warranty, depending on the model.
5. What is the SAJ battery price in Australia?
The SAJ battery price in Australia typically ranges from approximately A$4,148 to A$13,190, depending on battery capacity and system configuration.
