--- title: "Sigenergy SigenStor BAT stack (1 module) 8.06 kWh Battery: Specs & Datasheet | ComparePV" description: "Sigenergy SigenStor BAT stack (1 module) 8.06 kWh home battery. Specs: 4.0 kW continuous, 91.0 kg." source: "https://comparepv.com/battery/sigenergy-sigenstor-bat-stack-1-module" updated: 2026-01-11 --- # Sigenergy SigenStor BAT stack (1 module) ## Identity - **Manufacturer:** Sigenergy - **Model:** SigenStor BAT stack (1 module) - **Series:** SigenStor Battery (SigenStor BAT) - **Usable energy:** 8.06 kWh - **Cell technology:** LFP ## How it compares Compared against 44 batteries from 6 to 12 kWh. Ranks are within that class. | Measure | This battery | Class median | Standing | Rank in class | | --- | --- | --- | --- | --- | | Round-trip efficiency | - | 95.0% | | | | Power per kWh | 0.50 | 1.00 | Weak - bottom 7% | 22 | | Cycle life | - | 6000 | | | | Weight per kWh | 11.3 | 12.3 | Typical | 12 | | Warranty | - | 10 yrs | | | ## Specification ### Capacity - **Usable energy:** 8.06 kWh - **Nominal energy:** 8.06 kWh - **Module energy:** 8.06 kWh - **Modules per stack:** 1 to 6 - **Max system capacity:** 48.4 kWh ### Power - **Continuous discharge power:** 4.00 kW - **Continuous charge power:** 4.00 kW - **Peak discharge power:** 6.00 kW ### Cells and voltage - **Cell technology:** LFP - **Cell management:** Cobalt-free ### Physical - **Dimensions:** 640 × 850 × 260 mm - **Weight:** 91.0 kg - **Enclosure:** IP66 - **Mounting:** wall - **Cooling:** passive - **Noise:** 30 dB - **Operating temperature:** -20 to 55 °C ### Pros - **10,000 cycles with LFP chemistry** - The BAT-5.0 module has a certified lifespan of 10,000 charging cycles while maintaining at least 70% of its usable capacity, which, with daily charging from solar panels, translates to over 27 years of operation. For comparison, competing NMC systems (e.g., older BYD HVM modules) typically offer around 6,000 cycles. - **Modular scalability from 5 to 48 kWh** - A single SigenStor controller can manage 1-6 battery modules (5 or 8 kWh each), achieving up to 48 kWh per system, and even 1,440 kWh when multiple systems are connected in parallel. The built-in optimizer in each module allows for mixing different sizes (5 kWh + 8 kWh) without voiding the warranty - a rare feature in this product category. - **Guaranteed minimum energy throughput** - The 10-year warranty is linked to a guaranteed minimum energy flow: 15.85 MWh for a 5 kWh module and 23.77 MWh for an 8 kWh module. This provides tangible protection against premature degradation, regardless of usage patterns - a solution similar to the warranties offered by Sonnen and Tesla Powerwall 3. - **Wide operating temperature range: -20°C to +55°C** - The technical specifications include operation at temperatures ranging from -20°C to +55°C, making the system suitable for installation in unheated garages and agricultural buildings in central European climates - where NMC batteries require additional heating in winter. - **UL9540 and UL1973 certifications** - The BAT-6.0 and BAT-9.0 modules have UL9540 (energy storage systems) and UL1973 (stationary batteries) certifications, which simplifies obtaining permits for commercial and industrial projects and meeting the requirements of building insurers. ### Cons - **Internet addiction** - The system does not have a built-in 4G module and requires a constant connection to a home Wi-Fi/LAN network. According to independent reviews (SolarQuotes AU, PSC Energy AU), a loss of connection for more than 90 days results in the automatic shutdown of the battery - a significant risk for installations in buildings without a permanent internet connection, where the purchase of a separate 4G dongle (~250 AUD + subscription) is necessary. - **Hardware-related issues from 2025 (inventory)** - By the end of 2025, SolarQuotes AU reported instances of overheating and melted connectors in SigenStor inverters, leading to a recall program for the redesigned model. While this primarily affected the inverters, rather than the battery modules themselves, it highlights the limited production experience and the relatively short track record of the brand on the market (the company was founded ~2021). ## About this series The Sigenergy SigenStor Battery (SigenStor BAT) is a modular energy storage solution based on **LiFePO4 (LFP) chemistry**, specifically chosen where thermal safety, stable operation, and longevity during daily PV charging are crucial. In practice, this means a lower risk of overheating compared to NMC solutions and more predictable degradation over years of operation. The application of LFP cells pairs with **high cycle life** and **a 10-year guarantee** - for the user, this translates to genuinely lower energy costs over time and greater assurance that the storage remains economically viable after many seasons. The system features **scalable, modular capacity**, allowing you to start with a smaller configuration and expand as your self-consumption, heat pump, or EV charging needs grow. SigenStor BAT units are designed for hybrid system operation and work seamlessly with compatible Sigenergy inverters, facilitating integrated control and expansion. This solution is ideal for homes, small businesses, and backup power installations, with ambitions to operate effectively in off-grid scenarios as well. ## Questions ### How many cycles can the SigenStor BAT battery withstand, and how long will it actually last? The LiFePO4 cells used in the SigenStor BAT are rated for 10,000 charge and discharge cycles while maintaining high capacity. With a typical daily cycle (charging from PV during the day, discharging in the evening), this provides over 27 years of operation. In practice, the lifespan of the system is more likely to be limited by technological advancements rather than the wear and tear on the individual cells, making the purchase a decision with a very long-term perspective. ### What is the warranty on the SigenStor BAT energy storage system? Sigenergy offers a 10-year warranty on SigenStor BAT battery modules and the energy controller. This is one of the longer standard warranties available for home energy storage systems. It's advisable to check the terms with the installer, as the scope of the warranty service (e.g., response time, technician arrival) may vary depending on the distributor in the Polish market. ### What is the minimum storage capacity to start with, and how can I expand my SigenStor BAT system? The system is modular - available modules range from 5 to 10 kWh. You can start with a single module and add more (up to 6), reaching a total of 48 kWh in a single system. This allows you to tailor the installation to your current needs and later expand it, for example, when purchasing a heat pump or an electric vehicle charger, without having to replace the entire system. ### Can the SigenStor BAT operate safely in hot weather conditions? The LFP (LiFePO4) chemistry is significantly more thermally stable than popular NMC batteries - the risk of self-ignition is substantially lower. SigenStor BAT batteries feature an integrated BMS (Battery Management System) that monitors the temperature of each cell and regulates operation during hot weather. This is particularly important for batteries installed in garages or boiler rooms, where temperatures can rise significantly in the summer. ### Which inverters are compatible with the SigenStor BAT battery? The SigenStor BAT is designed to work with Sigenergy hybrid inverters (SigenStor series). The manufacturer integrates the battery, inverter, EV charger, and energy management system into a single ecosystem, which simplifies configuration and software updates. Connecting the battery to inverters from other brands is not supported by the manufacturer and may void the warranty. ### Does the SigenStor BAT system allow for island operation (off-grid) in the event of a power outage? Yes, the SigenStor system (inverter + BAT battery) supports the Emergency Power Supply (EPS) function, which means it automatically switches to battery power when the mains voltage drops. Installations with larger battery capacities and a well-calibrated energy management system allow for near-independence from the grid, which is particularly attractive for homes with heat pumps or those requiring uninterrupted power supply. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/batteries/d42dde280b141880adc5185f.pdf) ## Alternatives | Battery | Usable energy | Round-trip | Power | Voltage | Difference | | --- | --- | --- | --- | --- | --- | | [Huawei LUNA2000-7-S1](https://comparepv.com/battery/huawei-luna2000-7-s1) | 6.9 kWh | | 3.5 kW | | -1.2 kWh, -0.5 kW | | [BYD Battery-Box Premium HVM 8.3](https://comparepv.com/battery/byd-battery-box-premium-hvm-8-3) | 8.28 kWh | 96.0% | | HV | +0.2 kWh, high voltage | | [Sigenergy SigenStor BAT 8.0](https://comparepv.com/battery/sigenergy-sigenstor-bat-8-0) | 7.8 kWh | | 4.0 kW | HV | -0.3 kWh, high voltage | | [FoxESS ECS2900-H3](https://comparepv.com/battery/fox-ess-ecs2900-h3) | 7.78 kWh | 95.0% | | HV | -0.3 kWh, high voltage | | [BYD Battery-Box Premium HVS 7.7](https://comparepv.com/battery/byd-battery-box-premium-hvs-7-7) | 7.68 kWh | 96.0% | 7.7 kW | HV | -0.4 kWh, high voltage, +3.7 kW | | [FoxESS ECS4300H-H2](https://comparepv.com/battery/fox-ess-ecs4300h-h2) | 7.46 kWh | 95.0% | | HV | -0.6 kWh, high voltage | | [Deye GB-L8](https://comparepv.com/battery/gb-l8) | 7.36 kWh | | 8.2 kW | HV | -0.7 kWh, high voltage, +4.2 kW | | [Deye GB-SL-EU (2 modules in series)](https://comparepv.com/battery/gb-sl-eu-2-modules-in-series) | 7.36 kWh | | | HV | -0.7 kWh, high voltage | --- Source: https://comparepv.com/battery/sigenergy-sigenstor-bat-stack-1-module