Infinity Energy Services is an MCS-certified installer of Sigenergy’s SigenStor battery storage systems, serving homeowners and businesses across Wiltshire.
The SigenStor is a genuinely integrated home energy system – not simply a battery bolted onto an inverter, but a modular 5-in-1 platform that combines a solar inverter, battery storage, energy management system, battery power conversion, and an optional DC electric vehicle charger in a single, expandable unit.
It scales from just 5.84 kWh to 52.56 kWh, uses LiFePO4 chemistry with a 10-year warranty, and benefits from 0% VAT on residential installations until 31 March 2027.
Whether you’re in Swindon, Salisbury, Trowbridge, or Chippenham, our installation teams work across Wiltshire regularly.
This guide covers the full Sigenergy product range, what it costs, how it compares to alternatives, and why it’s becoming one of the most compelling battery storage options for UK homes.
– Last updated 17 April 2026 –
TABLE OF CONTENTS
• What Is the Sigenergy SigenStor?
• Sigenergy Home Energy Ecosystem
• The mySigen App
• Safety & Warranty
• Sigenergy SigenStor vs Tesla Powerwall
• Why Choose Infinity Energy Services?
• Video of a Customer Installation
• How Much Does Sigenergy Battery Cost?
• April 2026 Update
• Sigenergy Installation Process
• Areas We Serve in Wiltshire
• Sigenergy for Commercial Properties
• Frequently Asked Questions
• Get a Free Sigenergy Survey
What Is the Sigenergy SigenStor?
Most home battery systems consist of separate components: a solar inverter, a battery unit, and possibly an EV charger, each from different manufacturers, connected together with varying degrees of compatibility.
The Sigenergy SigenStor takes a fundamentally different approach. It is a 5-in-1 modular energy system that integrates five core functions into one stackable unit:
- Solar Inverter – converts DC power from your solar panels into AC power for your home.
- Battery PCS (Power Conversion System) – manages the flow of energy between the battery, the home, and the grid.
- Battery Pack – stores energy using safe, long-lasting LiFePO4 (lithium iron phosphate) cells.
- EMS (Energy Management System) – intelligently controls when to charge, discharge, import, or export based on your tariff, usage patterns, and solar generation.
- Optional EV DC Charger – a DC charging module that slots directly into the stack, offering up to 25 kW of bidirectional charging with V2X readiness.
This integrated design means faster installation (Sigenergy quotes 15 minutes for stackable assembly and 5 minutes for commissioning via the mySigen App), fewer potential points of failure, and a cleaner aesthetic than a wall covered in separate boxes and cables.
Sigen Battery – Capacity Options and Specifications
Sigenergy currently offers two battery modules in the UK as part of the Sigen Battery range:
- 6.0 module (6.02 kWh total capacity, 5.84 kWh usable)
- 10.0 module (9.04 kWh total, 8.76 kWh usable).
Both feature premium 314 Ah cells rated for 10,000 cycles, significantly higher than the industry norm.
The earlier SigenStor BAT range – which included 5.0 and 8.0 modules – has been discontinued, though existing installations continue to be supported and those modules can still be mixed with the newer Sigen Battery modules in the same stack, thanks to the built-in battery optimiser.
All modules use LiFePO4 chemistry, which is widely regarded as the safest lithium battery technology available.
The IP66 ingress protection rating means they can be installed outdoors without an additional enclosure, which is particularly useful for Wiltshire properties where internal wall space may be limited.
SPECIFICATION | 6.0 MODULE | 10.0 MODULE |
Total energy capacity | 6.02 kWh | 9.04 kWh |
Usable energy capacity | 5.84 kWh | 8.76 kWh |
Battery chemistry | LiFePO4 | LiFePO4 |
Cycle life | 10,000 | 10,000 |
Maximum charge / discharge power | 3,000 W | 4,600 W |
Weight | 62 kg | 78 kg |
IP rating | IP66 | IP66 |
Installation | Floor / Wall | Floor / Wall |
Start Small, Grow on Demand
One of Sigenergy’s most practical features is its genuine modularity. Each Energy Controller supports between one and six battery modules, giving a capacity range from 5.84 kWh to 52.56 kWh per stack.
If your needs change – perhaps you add an electric vehicle, install a heat pump, or simply find that your energy consumption has grown – you can add modules without replacing the controller or rewiring the system.
The newer Sigen Battery models include a built-in battery optimiser that allows you to mix older and newer modules in the same stack. This is a meaningful advantage for Wiltshire homeowners who want to start with a modest system and expand over the next few years as their energy needs evolve.
Call 0800 909 8882
with any questions or for expert advice
The Complete Sigenergy Home Energy Ecosystem
The SigenStor battery is the centrepiece, but the Sigenergy platform extends well beyond storage. Here is the full range of components available in the UK, each designed to work together seamlessly through the mySigen App.
Download the Sigenergy Home Energy Solution datasheet, showing how all of Sigenergy’s home technologies fit together.
Sigen Energy Controller
The brain of the system. Single-phase models available in the UK are as follows
- 3.0 kW (with 2 MPP trackers and up to 98% efficiency)
- 3.6 kW (with 2 MPP trackers and up to 98% efficiency)
- 4.0 kW (with 2 MPP trackers and up to 98% efficiency)
- 4.6 kW (with 2 MPP trackers and up to 98% efficiency)
- 5.0 kW (with 2 MPP trackers and up to 98% efficiency)
- 6.0 kW (with 2 MPP trackers and up to 98% efficiency)
- 8.0 kW (with 3 MPP trackers and up to 97.6% efficiency)
- 10.0 kW (with 4 MPP trackers and up to 97.6% efficiency)
- 12.0 kW (with 4 MPP trackers and up to 97.6% efficiency)
There are also multiple three-phase models, ranging from 5.0 kW (2 MPP trackers) all the way up to 30.0 kW (4 MPP trackers).
The three-phase range is particularly relevant for larger Wiltshire properties or small commercial installations.
The controller includes the EMS, handles on-grid and off-grid operation, and provides multi-source black start capability, meaning the system can restart itself from solar, battery, or generator power after a complete grid failure.
Sigen Hybrid Inverter (SP2/TP2 Series)
A battery-ready solar inverter for homeowners who want to install solar panels now and add battery storage later.
It shares the same power range as the Energy Controller and can be upgraded to a full SigenStor system by adding the SigenStor BC battery controller and battery modules. This phased approach can help spread the cost of a complete home energy system.
Sigen EV DC Charging Module
This is where Sigenergy pulls ahead of most competitors. The DC charging module slots directly into the SigenStor stack in 12.5 kW or 25 kW variants, using a CCS2 connector with a voltage range of 150-1,000 V for broad EV compatibility.
It charges your car directly from solar or battery power via DC, avoiding the conversion losses inherent in traditional AC chargers.
It is V2X-ready, meaning that once vehicle-to-home standards are finalised, your EV could feed energy back into your home during a power cut or peak-rate period.
The module carries a 3-year warranty, an IP66 rating, and can be controlled remotely via the mySigen App.
Sigen EV AC Charger
For homeowners who prefer a dedicated wallbox-style charger, Sigenergy also offers an AC charger in 7 kW (single-phase), 11 kW, and 22 kW (three-phase) variants.
It supports 100% PV charging, solar boost charging, and fast charging modes when paired with SigenStor. Dynamic load management prevents your household supply from being overloaded. Integrated residual current fault protection (AC and DC) removes the need for a separate RCD in the consumer unit, reducing installation costs. IP65 rated for outdoor use.
Sigen Energy Gateway (HomeMax Series)
If backup power during a grid outage matters to you, the Energy Gateway is the component that delivers it.
Available as the HomeMax SP (single-phase, 100 A) and HomeMax TP (three-phase, 76 A), it provides 0 ms load-side backup switchover – your lights, broadband router, and fridge-freezer continue running without so much as a flicker.
It supports both whole-home and partial-home backup configurations, connects to generators via a smart port, and is ready for heat pump integration. At IP54, it is designed for indoor installation.
Sigen Communication Module
A plug-and-play USB dongle that adds 4G/3G/2G cellular connectivity to any Sigenergy controller or inverter.
At just 90 g with an IP66 rating, it is a simple solution for properties where Wi-Fi does not reach the garage or outbuilding where the system is installed – a common scenario in rural Wiltshire.
Sigen Power Sensor
Installed at your meter point, the Power Sensor provides 1% accuracy power monitoring with a 100 ms data refresh rate, enabling the EMS to make precise decisions about import, export, and self-consumption.
Available in single-phase and three-phase variants, with optional current transformer (CT) accessories. The newer Sub1G Kit adds Wi-Fi HaLow wireless communication for up to 200 m range – useful where the meter cupboard is some distance from the SigenStor unit.
Intelligent Energy Management with the mySigen App
The mySigen App is the control centre for your Sigenergy system. It provides real-time monitoring with energy data refreshing every 10 seconds, so you can see exactly where your electricity is flowing – from solar panels to battery, from battery to home, from grid to charger – at any moment.
Beyond basic monitoring, the app includes an AI Mode that analyses your consumption patterns and tariff structure to suggest optimal operating modes. For Wiltshire homeowners on time-of-use tariffs such as Octopus Agile or Intelligent Octopus, this is particularly valuable: the system learns when electricity is cheapest, charges the battery during those windows, and discharges during expensive peak periods. Over the course of a year, this automated optimisation can add hundreds of pounds to your savings.
The app also includes Sigen Shield (a visual representation of the battery’s five-layer safety systems), Sigen AI (an integrated assistant that can diagnose issues and submit service requests), and customisable ambient lighting for the controller unit. For our installation engineers, the app streamlines commissioning to a six-step process that can be completed in around five minutes.
Download the mySigen app from the Apple App Store or Google Play store.
Safety, Warranty, and Peace of Mind
Five-Layer Battery Safety
Sigenergy’s battery modules incorporate five layers of protection at the cell, module, and system level.
The LiFePO4 chemistry itself has inherently higher thermal stability than the NMC (nickel manganese cobalt) cells used in some competing products.
It does not experience thermal runaway under normal failure conditions, which is why it is increasingly the chemistry of choice for home installations.
Warranty Coverage
The Sigen Battery and Energy Controller carry a 10-year product warranty.
For the battery, Sigenergy also provides a performance warranty guaranteeing 60% of usable energy capacity at 10 years, or a minimum throughput energy (for example, 30.66 MWh for the 10.0 module), whichever milestone is reached first.
The Sigen Gateway has a 5-year warranty; the EV DC Charging Module has a 3-year warranty; and the Communication Module and Power Sensor each carry a 2-year warranty.
One detail worth noting: to maintain the full 10-year warranty, the system must remain connected to the internet for firmware updates. If it is disconnected for an extended period, a 5-year warranty is still guaranteed.
The warranty is transferable to a new owner if the system remains in its original location – a useful feature when it comes to adding value to your property.
Sigenergy SigenStor vs Tesla Powerwall
– How They Compare
Tesla Powerwall is the name most people know in the home battery market, and it remains an excellent product. But the Sigenergy SigenStor offers several technical advantages that are worth understanding before making a decision.
FEATURE | SIGENERGY SIGENSTOR | TESLA POWERWALL 3 |
Battery chemistry | LiFePO4 | LiFePO4 |
Capacity per unit | 5.84 to 8.76 kWh units | 13.5 kWh fixed |
Max. capacity (residential) | 52.56 kWh per stack | Up to 4 units (54 kWh) |
Modularity | Add 1 module at a time | Add full unit only |
Integrated DC EV charger | Yes (12.5 / 25 kW) | No |
V2X ready | Yes | Not yet |
Three-phase (UK) | Available now | Not yet available |
Backup switchover | 0 ms (with Gateway) | Near-instantaneous |
Warranty | 10 years | 10 years |
IP rating | IP66 (battery/controller) | IP67 |
Tesla’s strength lies in brand recognition, a large UK installer network, and a proven track record.
Sigenergy’s strength lies in granular modularity, optional integrated DC EV charging, V2X readiness, and the ability to start with a smaller investment and grow.
For Wiltshire homeowners who plan to add an electric vehicle or heat pump over the next few years, Sigenergy’s expandable architecture is a compelling factor.
Infinity Energy Services installs both Sigenergy and Tesla Powerwall systems in Wiltshire. We are a Tesla Powerwall Premium Installer, so we can offer genuinely impartial advice on which platform best suits your property and energy goals.
Read our dedicated guide comparing the Sigenergy SigenStor with the Tesla Powerwall 3 for more information.
Why Choose Infinity Energy Services for Your Sigenergy Installation in Wiltshire?
Infinity Energy Services was founded by Daniel Hanslip in 2011 and has been installing renewable energy systems across the south of England for well over a decade. We hold MCS certification, RECC membership, NICEIC approval, NAPIT registration, TrustMark accreditation, and CHAS compliance.
We are a Tesla Powerwall Premium Installer and a SunPower Elite Partner – manufacturer-level accreditations that reflect consistent quality and training standards. We were named Best Regional Installer at the Energy Efficiency Awards in both 2023 and 2024.
Our base is in Southampton, Hampshire, well within reach of every town in Wiltshire. Our installation teams work across the county regularly, from Swindon and Salisbury to Chippenham and Devizes. Every project begins with a free, no-obligation home survey, where we visit your Wiltshire property to assess roof orientation, electrical infrastructure, and the best location for your Sigenergy system.
Call 0800 909 8882
with any questions or for expert advice
WATCH OUR VIDEO OF A CUSTOMER INSTALLATION
Overview of a combined Sigenergy SigenStor & SunPower Solar Panel Installation
How Much Does a Sigenergy Battery System Cost in Wiltshire?
The cost of a Sigenergy system depends on several factors: the number of battery modules, the size of the Energy Controller, whether you include the EV DC Charging Module or Energy Gateway, and the complexity of the electrical work at your property.
Rather than publishing indicative prices that may quickly become outdated, we prefer to provide a transparent, itemised quote after your free home survey, so you know exactly what you are paying for, with no hidden costs.
What we can confirm is that residential Sigenergy installations benefit from 0% VAT under the Energy Saving Materials relief, which is guaranteed until 31 March 2027. Commercial installations are subject to 20% VAT. For more details, please see our dedicated Sigenergy SigenStor page or contact us directly.
Energy Bill Savings and Return on Investment
The financial case for battery storage is strengthening. The Ofgem energy price cap for Q2 2026 (April to June) is set at £1,641 per year for a typical household, with electricity priced at approximately 24.7p per kWh.
Analysts including Cornwall Insight are forecasting that the Q3 2026 cap (July to September) could rise significantly – potentially to around £1,972 – driven by Middle East-related wholesale gas price increases. In this environment, every kilowatt-hour of solar energy you store and use rather than buying from the grid represents a growing saving.
Wiltshire benefits from a solar yield of approximately 950 kWh per kWp installed, comfortably above the UK average. A typical 4 kWp solar installation in Wiltshire generates around 3,800 kWh per year.
Without a battery, much of the solar electricity generated during the day is exported to the grid at Smart Export Guarantee rates of 4-15p per kWh. With a Sigenergy battery, that same energy can be stored and consumed during the evening peak, avoiding grid purchases at 24.7p per kWh or more. The difference between export value and avoided import cost is where the financial return is generated.
Homeowners on time-of-use tariffs can further improve returns by charging the battery during off-peak overnight periods (sometimes as low as 7-10p per kWh) and discharging during peak windows. Sigenergy’s AI Mode automates this process entirely.
Sigenergy Battery – April 2026 Update
The Ofgem energy price cap dropped to £1,641 per year from 1 April 2026, a reduction of £117 (7%) from Q1 2026. The fall was driven primarily by the government’s £6.9 billion energy bill discount scheme, which removed certain policy costs from household bills and transferred them to general taxation. The Resolution Foundation estimates this will deliver typical annual savings of around £200 in real terms compared with 2024.
However, the outlook for the second half of 2026 is less encouraging. Cornwall Insight’s March 2026 forecast puts the Q3 2026 cap at approximately £1,972: a potential increase of over £330 in a single quarter, which would be one of the largest rises since the 2022 energy crisis. The driver is rising wholesale gas prices linked to Middle East geopolitical tensions. EDF and E.ON have published broadly similar forecasts.
For Wiltshire homeowners considering battery storage, this widening gap between current rates and forecast rates makes the timing particularly relevant. A Sigenergy SigenStor system installed now can lock in savings at today’s solar generation rates while providing a hedge against the anticipated Q3 price rise. With spring and summer bringing the highest solar generation months, a system commissioned in April or May will deliver its best returns immediately.
The Sigenergy Installation Process
Every Sigenergy installation by Infinity Energy Services follows a clear, structured process:
Areas We Serve in Wiltshire
Infinity Energy Services provides Sigenergy battery storage installations across Wiltshire, including the following towns and surrounding areas:
- Swindon
- Salisbury
- Trowbridge
- Chippenham
- Melksham
- Devizes
- Warminster
- Westbury
- Marlborough
- Amesbury
- Corsham
- Calne
- Bradford-on-Avon
- Malmesbury
- Tidworth
- Wootton Bassett
Whether your home is a Georgian townhouse in Salisbury, a thatched cottage in the Avon valley, a new-build in Swindon, or a rural property in the Marlborough Downs, we can design and install a Sigenergy system that fits.
Sigenergy for Commercial Properties in Wiltshire
While this page focuses primarily on residential installations, the Sigenergy platform is equally capable in commercial settings.
The three-phase Energy Controller range (5.0 to 30.0 kW) supports up to four MPP trackers, making it suitable for larger roof arrays across multiple orientations – a common scenario on commercial buildings.
With up to 52.56 kWh of storage per stack and the ability to run multiple stacks in parallel, the system scales comfortably to meet the demands of offices, retail premises, workshops, light industrial units, and hospitality venues across Wiltshire.
For businesses with vehicle fleets or staff EV charging needs, the integrated DC charging module is a particularly strong fit. It can charge directly from solar generation during working hours, reducing both grid demand charges and the cost of workplace EV charging infrastructure.
The mySigen App provides centralised monitoring across multiple system components, giving facilities managers clear visibility of energy flows, self-consumption rates, and export income – data that can feed directly into ESG reporting and carbon reduction commitments.
Commercial installations are subject to 20% VAT but may qualify for capital allowances under the Annual Investment Allowance. Contact us for a commercial energy assessment tailored to your Wiltshire business premises.
Contact our commercial team for a free site assessment and ROI calculation.
Frequently Asked Questions (FAQ)
The Sigenergy SigenStor has established itself as one of the leading home battery systems in the UK. It uses LiFePO4 chemistry – the safest available – with a 10-year warranty, modular expandability from 5.84 to 52.56 kWh, and an integrated DC EV charger that no other mainstream competitor offers. Independent installer reviews are consistently positive, particularly regarding the reliability of the mySigen App and the quality of the hardware.
The cost depends on battery capacity, controller size, and which additional components you choose. Residential installations benefit from 0% VAT until 31 March 2027. For a transparent, itemised quote with no hidden costs, contact Infinity Energy Services for a free home survey.
No. A Sigenergy battery can operate without solar panels by charging from the grid during off-peak hours and discharging during peak-rate periods. However, the greatest financial returns and environmental benefits come from pairing the battery with a solar panel system, as you can store excess solar generation rather than exporting it at lower rates.
Yes, when paired with the Sigen Energy Gateway (HomeMax series). The system provides 0 ms load-side backup switchover, meaning your home’s electricity supply continues without any interruption. Both whole-home and partial-home backup configurations are available.
Both are premium systems with 10-year warranties and LFP chemistry. Sigenergy offers greater modularity (start with 5.84 kWh and add individual modules), an integrated DC EV charger with V2X readiness, and three-phase support already available in the UK. Tesla offers stronger brand recognition and a simpler single-unit design. Infinity Energy Services installs both systems and can advise which is best for your situation.
Residential battery storage installations currently benefit from 0% VAT, confirmed until 31 March 2027. This applies whether the battery is installed alongside a new solar panel system or added to an existing one. Commercial installations are subject to standard 20% VAT.
Yes. This is one of Sigenergy’s core design principles. You can add battery modules to your existing SigenStor stack at any time, without replacing the Energy Controller or rewiring. The newer Sigen Battery models include a battery optimiser that allows you to mix older and newer modules in the same system.
Get a Free Sigenergy Survey in Wiltshire
The Sigenergy SigenStor is one of the most advanced and genuinely flexible home energy systems available in the UK. Its modular architecture, integrated EV charging, V2X readiness, and AI-driven energy management make it a system designed not just for today’s energy costs, but for the next decade of changes in how we generate, store, and use electricity.
Infinity Energy Services brings over 14 years of renewable energy installation experience to every project, backed by MCS certification, multiple manufacturer accreditations, and consecutive Best Regional Installer awards.
If you are considering battery storage or a solar panel installation for your Wiltshire home, we would welcome the opportunity to visit, assess your property, and provide a clear, transparent quote.
Contact Infinity Energy Services today for a free, no-obligation home survey and Sigenergy quote.
