Choosing the right solar battery isn’t just about price – it’s about peace of mind, energy security, and long-term savings. Here’s how Sigenergy stacks up against Growatt, so you can make the right call for your home.
Growatt and Sigenergy both come with a 10-year warranty. The Sigenergy system costs more, at about $1,014 per usable kWh. Homeowners have embraced both these options widely. The SigenStor from Sigenergy stands out as the first five-in-one green energy solution. Installers and early users have given it a thumbs-up. Your final choice should depend on more than just cost and warranty. System compatibility and performance play a crucial role, too. This side-by-side comparison will guide you to pick the right option that matches your home’s energy needs. This applies whether you’re new to comparing these brands or looking to upgrade between Growatt and Sigenergy.
Battery Technology and Performance
Sigenergy and Growatt both employ Lithium Iron Phosphate (LiFePO4) battery chemistry. This chemistry stands out for its safety and longevity compared to older lithium technologies. A closer look at their specs shows some key differences in performance.
The Sigenergy SigenStor leads with impressive cycle life ratings of 8,000-10,000 cycles. This is a big deal as it means that it outlasts Growatt’s 6,000 cycles. You can expect decades of daily charging and discharging before any major degradation happens.
Efficiency numbers tell an interesting story. Sigenergy performs better with 95%+ round-trip efficiency, while Growatt sits at 90%. The 5% advantage means you get more usable electricity from your stored solar energy.
Sigenergy’s batteries can use 100% of their capacity under the right conditions. The SigenStor BAT 5.0 gives you 5.2kWh of usable capacity, and the BAT 8.0 provides 7.8kWh.
Power output is another strong point for Sigenergy, especially when you have multiple power-hungry appliances running at once. The BAT 5.0 delivers 2.5kW with peaks of 3.75kW, while the BAT 8.0 pushes out 4.0kW with peaks reaching 6.0kW.
Safety features in Sigenergy’s system are comprehensive. The battery features high-temperature insulated padding, an internal fire extinguisher, aerogel-insulated pads between cells, decompression valves, and seven temperature sensors. It also uses AI-powered battery management to optimize charging cycles based on how you use the system. This smart approach could push the system’s lifespan beyond typical expectations.
System Compatibility and Installation
Sigenergy and Growatt battery systems differ mainly in their installation options. Both brands let homeowners combine smoothly with existing solar setups or build new systems from scratch through AC and DC coupling.
The SigenStor from Sigenergy uses a modular, stackable design that holds 5kWh to 48kWh per stack. Users can connect multiple units side by side to meet larger power needs in homes and businesses. The system’s IP66 rating allows indoor and outdoor placement. Users can mount it on walls for smaller setups or place it on the floor for bigger installations.
Growatt’s APX battery system also takes a modular approach. The APX 5.0P-B1 starts at 5kWh and users can add more capacity. This system runs on a higher DC voltage – about 600-650V nominal in a full stack compared to standard 48V batteries.
Sigenergy’s dual-sensor system helps modernize existing solar setups. The first sensor tracks power from other inverters and shows data on the mySigen app. The second sensor handles grid connections to prevent power feedback.
Sigenergy works with other brands, which means it combines well with solar panels and inverters of all types. Both systems support single-phase and three-phase setups, making them suitable for different homes.
Cost, Warranty, and User Feedback
Battery system prices show significant variations between these manufacturers. Growatt’s systems cost around AUD 1446.42 per usable kWh, making them a budget-friendly choice. Sigenergy’s products range from AUD 7644.95 for the 8kWh model to AUD 21711.66 for larger systems.
The warranty terms differ between these manufacturers despite both offering 10-year coverage. Growatt’s warranty ensures 70% capacity retention after 10 years and provides throughput warranties of 3.04-3.24MWh per usable kWh. Sigenergy’s warranty guarantees 70% capacity retention at year 10 or throughput coverage of 15.85MWh for the 5kWh module and 23.77MWh for the 8kWh module.
Sigenergy leads customer satisfaction with a 4.94 user rating, while Growatt maintains a solid 3.94 rating from 16 verified reviews. Customers particularly appreciate Sigenergy’s app interface and system integration features.
Australian rebate programs enhance the value proposition significantly. The federal battery incentive provides AUD 504.57 per usable kWh. Western Australia’s residents receive an additional AUD 198.77 per kWh, which increases to AUD 581.02 in regional areas.
Comparison Table
| Feature | Sigenergy | Growatt |
|---|---|---|
| Battery Technology | ||
| Chemistry | Lithium Iron Phosphate (LiFePO4) | Lithium Iron Phosphate (LiFePO4) |
| Cycle Life | 8,000-10,000 cycles | 6,000 cycles |
| Round-trip Efficiency | 95%+ | 90% |
| Depth of Discharge | 100% | Not mentioned |
| Capacity & Power | ||
| Base Module Capacity | BAT 5.0: 5.2kWh BAT 8.0: 7.8kWh | APX 5.0P-B1: 5kWh |
| Discharge Capability | BAT 5.0: 2.5kW (3.75kW peak) BAT 8.0: 4.0kW (6.0kW peak) | Not mentioned |
| System Scalability | 5kWh to 48kWh per stack | Expandable (specific range not mentioned) |
| Installation & Compatibility | ||
| Mounting Options | Wall-mounted or floor-mounted | Not mentioned |
| IP Rating | IP66 | Not mentioned |
| Cross-brand Compatibility | Yes | Not mentioned |
| Warranty & Cost | ||
| Warranty Period | 10 years | 10 years |
| Capacity Retention | 70% after 10 years | 70% after 10 years |
| Energy Throughput | 5kWh module: 15.85MWh 8kWh module: 23.77MWh | 3.04-3.24MWh per usable kWh |
| Cost per Usable kWh | AUD 1,014 | AUD 1,446.42 |
| User Rating | 4.94 | 3.94 (from 16 reviews) |
Conclusion
Sigenergy outperforms Growatt in cycle life (8,000–10,000 vs. 6,000), round-trip efficiency (95%+ vs. 90%), energy throughput, and price per usable kWh (AUD 1,014 vs. AUD 1,446.42). It also has higher user ratings (4.94 vs. 3.94), advanced safety features, AI-enabled battery management, and cross-brand compatibility. Both offer 10-year warranties and modular expansion, but Sigenergy delivers better long-term value, flexibility, and performance—making it the stronger choice for most homeowners, especially with available Australian rebates.
Need Help Choosing?
If you’re based in the Gold Coast, Brisbane, or Sunshine, SolarThoughts® can help you install a solar storage system tailored to your home. We offer FREE expert quotes, installation by Clean Energy Council (CEC) accredited professionals, and only the top Tier 1 panels.
📞 Call 1300 846 844
📍 Suite 4.50, Level 4 South Tower, 339 Coronation Drive, Milton
🌐 www.solarthoughts.com.au
FAQs
Q1. What are the main differences between Sigenergy and Growatt battery systems?
Sigenergy offers higher cycle life (8,000-10,000 cycles vs. 6,000), better round-trip efficiency (95%+ vs. 90%), and a greater energy throughput warranty. Sigenergy also provides cross-brand compatibility and AI-enabled battery management, while being more cost-effective per usable kWh.
Q2. How do the warranties compare between Sigenergy and Growatt?
Both companies offer 10-year warranties with 70% capacity retention guarantees. However, Sigenergy provides a higher energy throughput warranty of 15.85MWh for a 5kWh module, compared to Growatt’s 3.04-3.24MWh per usable kWh.
Q3. Are there any financial incentives available for installing these battery systems?
Yes, Australian homeowners can benefit from federal incentives of approximately AUD 504.57 per usable kWh. Additionally, some states offer extra benefits, such as Western Australia’s AUD 198.77 per kWh (increasing to AUD 581.02 in regional areas).
Q4. Which system is more suitable for expanding energy storage capacity?
Both Sigenergy and Growatt offer modular designs for expansion. Sigenergy’s SigenStor can accommodate between 5kWh and 48kWh per stack, while Growatt’s APX system starts with a 5kWh base module and can be expanded. Sigenergy’s cross-brand compatibility may offer more flexibility for future upgrades.
Q5. How do user ratings compare between Sigenergy and Growatt?
Sigenergy has received higher user satisfaction ratings, with a 4.94 out of 5 score. Growatt, while still positively reviewed, has a lower rating of 3.94 based on 16 verified reviews. Users particularly praise Sigenergy’s app interface and integration capabilities.
