The Sigenergy SigenStor Battery Module (BAT LED) is a floor-standing, stackable LiFePO4 home energy storage unit with an integrated LED status indicator, designed exclusively for the SigenStor Energy Controller (EC) ecosystem. Available in four capacities — 5.0 kWh, 6.0 kWh, 8.0 kWh and 9.04 kWh (BAT 10.0 label) — between one and six modules can be installed per controller stack, giving scalable usable storage from approximately 5.2 kWh up to ~54 kWh in a single stack. The 100% depth of discharge, 280–314 Ah premium LiFePO4 cells, 10,000-cycle rated life and AI-enabled Battery Management System combine to deliver long-term, low-degradation storage for solar self-consumption, time-of-use shifting and backup power. Quick-connect DC cabling allows installation without specialist tooling, and battery state is visible both on the physical LED strip and remotely via the mySigen App.
5.2–8.76
kWh Usable (per module)
⚠ Installer & Compatibility Requirements
- The SigenStor BAT LED module must only be used with a SigenStor Energy Controller (EC) — it is not compatible with third-party inverters or controllers when used standalone.
- When connecting to a Sigen Hybrid SP2 or TP2 inverter, a SigenStor Battery Controller (BC) is required as an intermediary — the battery cannot connect directly to the Hybrid inverter.
- Battery modules should be installed indoors or in a protected, well-ventilated location. Although rated IP66, the manufacturer recommends indoor installation for optimal thermal performance and warranty compliance.
- After full discharge to 100% DoD, the battery must be recharged within 7 days to maintain cell health. Prolonged full-discharge storage will accelerate degradation.
- Installation must be carried out by a competent, qualified electrician familiar with DC high-voltage battery systems. Compliance with IEC/EN 62619 and local wiring regulations is mandatory.
⚠ Capacity Naming & Variant Selection Advisory
The "SigenStor BAT 10.0" has a nominal total energy of 9.04 kWh and a usable capacity of 8.76 kWh. The "10.0" designation is a manufacturer product-line label, not a usable kWh figure. Always quote the usable capacity figure to end customers to avoid misrepresentation. Similarly, the BAT 5.0 delivers 5.2 kWh usable from a 5.38 kWh total, and the BAT 8.0 delivers 7.8 kWh usable from 8.06 kWh total. Choose your variant based on the usable capacity column in the specification table below.
ⓘ Scalable Stacking & Mixed-Module Flexibility
A single SigenStor EC stack supports between 1 and 6 battery modules (or up to 5 if the EV DC Charging Module is also fitted). Different module capacities can be mixed in the same stack — for example, combining a BAT 8.0 with a BAT 5.0 for a 13 kWh usable system. The Energy Management System automatically manages proportional charge and discharge across mixed-capacity configurations. This makes the SigenStor battery range ideal for phased installs where additional capacity is added over time without replacing existing modules.
LiFePO4 Cell Chemistry
Lithium iron phosphate chemistry is the gold standard for stationary storage — it has a far superior thermal runaway threshold compared to NMC or NCA, meaning it does not reach dangerous temperatures under abuse conditions. Combined with 280–314 Ah large-format cells operating at lower voltage stress, the result is a 10,000-cycle rated life from the cell manufacturer (at 25°C, 0.5C rate, to 60% state-of-health). This translates to over 25 years of daily cycling under normal residential conditions.
5-Layer Battery Safety Architecture
Sigenergy's 5-layer protection system provides redundant safety at every level: cell-level protection (BMS cell balancing and over-current cut-off), module-level protection (thermal monitoring, isolation fault detection), string-level protection (inter-module communication and balancing), system-level protection (integrated with the Energy Controller's PCS) and cloud-level monitoring via mySigen. This layered design exceeds the requirements of IEC/EN 62619 and IEC/EN 63056.
AI Battery Management System
The cloud-native, AI-enabled BMS analyses historical charge and discharge patterns, solar generation data and tariff schedules to optimise cycle depth and charging rate in real time. Over the system's lifetime this reduces unnecessary full cycles and high-rate charging events, measurably extending usable capacity retention. The BMS also enables remote firmware updates, diagnostic alerts and state-of-health reporting, all accessible via the mySigen App without requiring an engineer visit.
Integrated LED Status Display
The front-panel LED status strip provides an at-a-glance charge state indication without requiring a phone or app. This is particularly useful during commissioning and fault-finding: installers can confirm module status, active charging and error states directly at the unit. The LED design also forms part of the system's ambient lighting aesthetic, complementing the SigenStor EC's front display in a matching style that integrates cleanly into modern plant rooms and garages.
Quick-Connect Installation
Tool-free quick-connect DC cable connectors link each battery module to the next and to the Energy Controller without the need for crimping or specialist DC tooling on-site. This supports the 15-minute installation claim Sigenergy quotes in their system marketing. Modules are floor-standing or wall-mountable, with a built-in base unit (sold separately, the SigenStor BC) and decorative covers available to create a unified, finished appearance that is presentable in living spaces.
100% Depth of Discharge
Unlike many competitors that derate usable capacity to 80–90% of nominal to protect the cells, the SigenStor BAT supports 100% depth of discharge, meaning the full usable capacity figure quoted is genuinely accessible. The AI BMS manages the charge/discharge envelope to ensure this does not harm cycle life — the 10,000-cycle rating is achieved at full DoD under the cell manufacturer's standard test conditions. This maximises the return on investment from each installed kWh of capacity.
Technical Specifications — All Variants
| Specification |
BAT 5.0 |
BAT 6.0 |
BAT 8.0 |
BAT 10.0 (9.04 kWh) |
| Electrical |
| Battery Chemistry |
LiFePO4 (Lithium Iron Phosphate) |
| Cell Capacity |
280 Ah |
314 Ah |
| Total Energy Capacity |
5.38 kWh |
6.02 kWh |
8.06 kWh |
9.04 kWh |
| Usable Energy Capacity |
5.2 kWh |
5.84 kWh |
7.8 kWh |
8.76 kWh |
| Depth of Discharge |
100% |
| Max. Continuous Charge / Discharge Power |
2,500 W |
4,600 W |
| Peak Power (10 s) |
3,750 W |
6,900 W |
| Operating Voltage — Single Phase |
300–600 V DC |
| Operating Voltage — Three Phase |
600–900 V DC |
| Cycle Life (cell mfr. rating) |
10,000 cycles |
| Mechanical |
| Dimensions (W × H × D) |
767 × 270 × 260 mm |
767 × 270 × 265 mm |
| Weight |
70 kg |
62 kg |
70 kg |
78 kg |
| Installation Method |
Floor-standing / Wall-mounted |
| Ingress Protection |
IP66 |
| Cooling Method |
Natural convection (passive) |
| Environmental |
| Operating Temperature |
−20°C to +55°C |
| Storage Temperature |
−25°C to +60°C |
| Relative Humidity |
5%–95% |
| Max. Operating Altitude |
4,000 m |
| Compliance & Compatibility |
| Standards |
IEC/EN 60730-1, UN 38.3, IEC/EN 62619, IEC/EN 63056, IEC/EN 62477 (IEC/EN 62040 for BAT 5.0/8.0) |
| Compatible Controllers |
SigenStor EC series; Sigen Hybrid SP2/TP2 (requires SigenStor BC) |
| Modules per Controller |
1–6 (1–5 with EVDC module installed) |
| Mixed Module Stacking |
Supported — different capacities can be combined in the same stack |
| Warranty & SKU Reference |
| Warranty |
10 years |
| AIZO SKU |
SIG-STOR-BAT-5.0 |
SIG-STOR-BAT-6.0 |
SIG-STOR-BAT-8.0 |
SIG-STOR-BAT-9.04 |
| Manufacturer MPN |
SigenStor BAT 5.0 |
SigenStor BAT 6.0 |
SigenStor BAT 8.0 |
SigenStor BAT 10.0 |
Stack Capacity Quick Reference — BAT 8.0 (most specified)
| Modules |
Total Usable (BAT 8.0) |
Max Continuous Power |
Stack Height (approx.) |
| 1 |
7.8 kWh |
4.0 kW |
~640 mm |
| 2 |
15.6 kWh |
8.0 kW |
~910 mm |
| 3 |
23.4 kWh |
12.0 kW |
~1180 mm |
| 4 |
31.2 kWh |
16.0 kW |
~1450 mm |
| 5 |
39.0 kWh |
20.0 kW |
~1720 mm |
| 6 |
46.8 kWh |
24.0 kW |
~1990 mm |
Heights based on published datasheet stacked dimensions (BAT 5.0/8.0 datasheet). Actual stack height will vary slightly with decorative covers and base unit. Maximum 5 modules if the SigenStor EVDC module is installed.
Frequently Asked Questions
Can I add more battery modules to my existing SigenStor system later?
Yes — the SigenStor battery architecture is specifically designed for incremental capacity expansion. You can add additional BAT modules to your existing Energy Controller stack at any time, up to the controller's maximum of 6 modules (or 5 if you have the EVDC charging module installed). You can also mix different capacities in the same stack, so adding a smaller module to an existing larger one is fully supported. The Energy Management System will automatically recalibrate charge and discharge management across all modules.
What is the difference between the SigenStor BAT 10.0 and the BAT 9.0?
The BAT 10.0 is the manufacturer's product designation (MPN: SigenStor BAT 10.0) for a module with a total energy capacity of 9.04 kWh and a usable capacity of 8.76 kWh. The "10.0" label reflects the product generation line, not the kilowatt-hour rating. There is no separate "BAT 9.0" product in the UK SigenStor range — what you may see referred to as the 9 kWh module is the BAT 10.0. When specifying to end customers, always use the usable capacity figure of 8.76 kWh.
Does the SigenStor battery provide backup power during a grid outage?
Backup capability depends on the Energy Controller variant, not the battery module itself. The SigenStor EC with backup functionality enabled can provide automatic switch-over to battery power during grid outages, typically within milliseconds. The BAT modules store the energy; it is the EC's integrated PCS (Power Conversion System) that manages grid islanding and load switching. Confirm with the installer which EC variant is being specified — not all configurations support full home backup without additional components.
Which module size is most commonly specified for residential installs?
The BAT 8.0 (7.8 kWh usable) is the most widely specified single-module option for UK residential installs. A single BAT 8.0 covers a typical daily self-consumption shortfall for a 3–4 bed home with a standard solar array. The BAT 10.0 (8.76 kWh usable) is preferred where maximum capacity per module is required — for example, in larger homes or properties targeting higher solar self-sufficiency. The BAT 5.0 is commonly used as an entry module for smaller properties or budget-conscious installs, with the option to stack additional modules later.
What certifications does the SigenStor battery hold and is it MCS compatible?
The SigenStor BAT modules are certified to IEC/EN 62619 (safety for secondary lithium cells in stationary applications), IEC/EN 63056 (safety requirements for electrical energy storage systems), UN 38.3 (transport testing for lithium batteries), and IEC/EN 60730-1. For SEG (Smart Export Guarantee) and ECO4 / BUS-funded installations, the system must be installed by an MCS-accredited installer and the full SigenStor system (EC + batteries) must appear on the MCS Product Characteristics Database (PCDB). Always verify current PCDB listing status with Sigenergy UK before quoting on funded schemes.
Can the battery be installed outdoors?
The SigenStor BAT modules are rated IP66, which provides protection against powerful water jets and full dust ingress — technically suitable for covered outdoor locations. However, Sigenergy recommends indoor installation for optimal thermal management and to preserve the 10-year warranty. The operating temperature range of −20°C to +55°C means the battery will function outdoors in UK conditions, but extreme cold reduces effective capacity and charge acceptance. A protected, frost-mitigated indoor space (plant room, garage, utility room) is strongly preferred.
