Sigenergy Battery Price UK: SigenStor Price List, Specs & Review

SigenStor is an all-in-one solar energy system combining a hybrid inverter, stackable LFP battery storage (6kWh to 54kWh), and built-in EV charging with AI energy management. It works with any brand of solar panels.

Yes. Sigenergy has a growing network of MCS-certified installers across the UK. Ask your solar installer if they can supply and install SigenStor systems.

Sigenergy is fitted by MCS-certified solar and battery installers, not sold direct. There is no separate Sigenergy-only approved installer list in the UK, so the best route is to browse MCS installers in your county and ask whether they fit the SigenStor (most competent battery installers can source it). You can compare local installers by county on our installers directory, or request quotes and we'll match you with companies covering your area.

You need an MCS-certified installer, which is required for Smart Export Guarantee eligibility and 0% VAT, but you don't need a Sigenergy-specific accreditation. Any experienced MCS solar and battery installer can commission a SigenStor. Ask the installer to confirm they've fitted Sigenergy before and that they'll register the system so you receive firmware updates.

Sigenergy offers better flexibility (stackable 6kWh to 54kWh against the Tesla Powerwall 3's fixed 13.5kWh) and built-in EV charging with V2G. The Tesla Powerwall 3 has stronger brand recognition and a longer UK track record. Both use LFP chemistry and 10-year warranties. For homes with an EV, Sigenergy's built-in V2G charging is the key differentiator. For the simplest proven single unit, the Powerwall 3 wins.

Sigenergy reviews are largely positive: owners and installers praise the stackable capacity, built-in EV charging and AI tariff optimisation. The main caveats raised in reviews are the still-growing UK installer network, the 2025 single-phase inverter recall in Australia, and that it's a newer brand. Our editorial rating is 4.5/5.

A SigenStor system typically costs £4,500 to £9,600+ depending on battery capacity and inverter size. A 12kWh system with inverter costs roughly £5,500 to £7,000 installed. 0% VAT applies until March 2027.

Yes. SigenStor includes built-in AC and DC EV charging with vehicle-to-grid (V2G) and vehicle-to-home (V2H) capability. This is unique, most competitors require a separate EV charger.

Sigenergy uses LFP (Lithium Iron Phosphate) battery chemistry, which is the safest and most durable lithium battery type. LFP lasts longer and has lower fire risk than NMC alternatives.

A Sigenergy 9kWh battery (BAT-9.0) with hybrid inverter typically costs £4,500 to £6,000 installed in the UK. This includes the gateway and basic installation. Adding the DC EV charging module costs from £3,500 extra.

A Sigenergy 12kWh system (2× BAT-6.0 modules) with a 10kW inverter typically costs £5,500 to £7,000 installed. This is one of the most popular configurations for UK homes with solar panels.

The Sigenergy gateway is the communication hub that connects your inverter, battery, and EV charger to your Wi-Fi and the Sigenergy cloud. It runs the AI energy management and handles firmware updates. It's included with every SigenStor system (5-year warranty).

Yes. The Sigenergy app (iOS and Android) lets you monitor real-time solar generation, battery level, grid usage, and EV charging. You can also control charging schedules, switch between AI modes, and start/stop EV charging remotely.

Yes. The SigenStor includes a built-in EV car charger supporting both AC and DC charging. It also supports vehicle-to-grid (V2G) and vehicle-to-home (V2H), meaning your car battery can power your home during peak hours.

The Sigenergy hybrid inverter isn't sold separately. It's included in the SigenStor system price. A system with a 5kW inverter starts from around £3,500 installed, and a 10kW inverter system from around £5,500.

Your installer should be MCS-certified. MCS certification is required to be eligible for Smart Export Guarantee (SEG) payments, which let you earn money by exporting surplus solar electricity to the grid.

Sigenergy batteries are stackable LFP modules: BAT-6.0 (6kWh nominal, 5.84kWh usable) and BAT-9.0 (9kWh nominal, 8.76kWh usable). Stack from 6kWh up to 54kWh per tower. Common UK configurations are 12kWh (2× BAT-6.0) and 18kWh (2× BAT-9.0).

Sigenergy is a founder-led company started by Tony Xu (Xu Yingtong), who previously ran Huawei's solar inverter business. It is not owned by Huawei or any other manufacturer. In April 2026 Sigenergy listed on the Hong Kong Stock Exchange at a valuation of around $5.8 billion, so it is now a publicly traded company.

Sigenergy is headquartered in Shanghai, China, where its R&D centre is based. SigenStor batteries are built at the company's own factory in Shanghai's Lin-gang area, which has an annual production capacity of 6GWh. UK systems are supplied through distributors and fitted by MCS-certified installers.

Sigenergy was founded in early 2022 by former Huawei executives. Despite being a young brand, it grew fast enough to float on the Hong Kong Stock Exchange in April 2026, and its founding team's Huawei inverter pedigree is a big part of why installers trusted the product early.

SigenStor modules use LFP (lithium iron phosphate) cells, which are rated for thousands of charge cycles. With daily cycling you can expect well over a decade of useful life, and Sigenergy backs the battery with a 10-year warranty.

The system's AI mode learns your household consumption pattern, then combines it with solar generation forecasts and your electricity tariff windows. It charges the battery when electricity is cheapest (or from surplus solar) and discharges during expensive peak periods, all automatically via the mySigen app.

Peak shaving means the battery discharges during the most expensive grid periods (typically 4pm to 7pm) so your home imports little or nothing at peak rates. On a time-of-use tariff like Octopus, this is where most of a battery's savings come from.

Yes. On a cheap overnight tariff (such as Octopus Intelligent Go or Economy 7) the SigenStor can force-charge from the grid during off-peak hours and run your home from the battery during the day. You can schedule this in the mySigen app or let the AI mode handle it based on your tariff.

Up to 6 battery modules can be stacked in a single SigenStor tower, giving a maximum of 54kWh. Modules simply stack on top of each other with no cables between them, so capacity can be added later if your needs grow.

A SigenStor quote includes a hybrid inverter, battery storage and optionally DC EV charging in one unit, so it replaces two or three separate pieces of hardware. Compared per kWh against a Tesla Powerwall 3 including installation, Sigenergy is usually similar or cheaper; it only looks expensive next to basic AC-coupled batteries that do far less.

Each battery module is 625mm wide × 270mm deep. The BAT-6.0 is 207mm tall (~63kg) and the BAT-9.0 is 297mm tall (~91kg). All modules share the same footprint and stack vertically with the inverter and gateway, requiring just one wall location.

The 'Sigenergy 10kW battery' usually refers to a 10kW hybrid inverter paired with a battery stack, typically 12kWh (2× BAT-6.0) for £5,500 to £7,000 installed. Sigenergy specifies inverters in kW and batteries in kWh, so the closest direct match is the 10kW + 12kWh configuration.

The closest Sigenergy battery to 5kWh is a single BAT-6.0 module (5.84kWh usable). With the 5kW hybrid inverter, this 'starter' configuration costs around £3,500 to £4,500 installed in the UK.

The Sigenergy BAT-9.0 (8.76kWh usable) with the 8kW hybrid inverter costs around £4,500 to £6,000 installed in the UK. This is the closest match to the '8kWh' search and is one of the most popular configurations for 3-bed UK homes.

Yes. Sigenergy gateways expose Modbus TCP, so community-maintained Home Assistant integrations (sigenergy2mqtt, HACS) can read solar, battery, grid and EV charging data and write operating mode, force-charge schedules and import/export caps. Modbus must be enabled by your installer at commissioning.

Homeowners log in to the mySigen app (iOS/Android) with the email registered during installation. Installers use the SigenCloud portal at sigenergy.com for fleet management. There is no separate homeowner web login, the app is the primary interface.

First line support is your MCS installer, who can pull diagnostics via SigenCloud and raise warranty tickets on your behalf. For direct queries, contact Sigenergy via sigenergy.com/support. Response times are typically 1 to 3 working days.

A typical Sigenergy solar + battery installation is completed in 1 to 2 days by an MCS-certified installer. Adding the DC EV charging module extends this to 2 to 3 days. The system can also be retrofitted to existing solar arrays without replacing your panels.

The full Sigenergy SigenStor datasheet (covering the hybrid inverter, BAT-6.0 and BAT-9.0 modules, gateway and EV charging module) is available on sigenergy.com under the SigenStor product page. Your installer will provide the relevant pages with your quote.