MCS Certified Battery Installers
Battery Storage Systems
Store excess solar energy and use it when you need it most. ElectriFusion Solutions installs premium battery storage systems from Tesla, Hanchu, Fox ESS, and Sigenergy with lifetime warranties. Maximise your solar investment and protect your home against power cuts across Doncaster, Sheffield, and South Yorkshire.
Lifetime
Battery Warranty
6,000+
Charge Cycles Rated
24/7
Backup Power Provided
MCS
Certified Installer
0% VAT
With Solar Package
What Is Battery Storage?
A home battery storage system stores electricity generated by your solar panels during the day so you can use it in the evening, overnight, or during a power cut. Without a battery, any solar energy you generate but do not use immediately is exported to the grid for a small payment under the Smart Export Guarantee. With a battery, you keep that energy and use it yourself when grid electricity is at its most expensive.
Modern lithium-ion batteries are compact, quiet, and designed for daily cycling over 15 to 25 years. They mount on a wall in your garage, utility room, or outside, and integrate seamlessly with your solar PV system through a hybrid inverter. The entire setup is monitored via a smartphone app, giving you real-time visibility of how much energy you are generating, storing, and consuming.
Battery storage is not limited to homes with solar panels. You can also charge a battery from the grid during off-peak tariff periods (such as Octopus Go or Economy 7) and discharge it during expensive peak hours, a strategy known as energy arbitrage. However, the greatest savings come from combining battery storage with a solar PV system, allowing you to self-consume up to 70% of the energy your panels generate rather than the 30-40% typical without a battery.
Battery Systems We've Installed
Real battery storage installations completed by our MCS-certified team across South Yorkshire.
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Tesla Powerwall
Garage wall mount
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SolarEdge System
Outdoor installation
Hanchu ESS Dual Stack
20kWh total capacity
Battery Brands We Install
We work with four of the most respected battery manufacturers in the world. Each brand offers distinct advantages, and we recommend the best option based on your specific requirements, property layout, and budget.
Tesla Powerwall 3
The Tesla Powerwall 3 (launched UK October 2024) stores 13.5 kWh with an industry-leading 11.04 kW continuous power output — 121% more than its predecessor. The integrated hybrid inverter handles up to 20 kWp of solar input across 3 MPPTs, making it a true all-in-one system. Storm Watch automatically charges the battery before severe weather. The Tesla Gateway enables whole-home backup, and units are expandable to 40.5 kWh. Round-trip efficiency is 97.5% DC-coupled.
Capacity: 13.5 kWh | 11.04 kW output | 3 MPPT inverter | Up to 40.5 kWh stackable
Hanchu
Hanchu pairs its ECCO hybrid inverters (3.6–8 kW) with LiFePO4 battery banks in three main variants: the W5.3 (5.32 kWh), L5.1 (5.12 kWh, stackable up to 16 units = 81.92 kWh), and the Lifelynk X — an all-in-one with 3.84 kWh battery and integrated 3.6 kW inverter. A Hanchu 15.9 kWh installed system starts from approximately £4,995 — significantly more cost-effective than comparable premium brands. EPS automatic grid-to-off-grid switching is built in.
5.12–81.92 kWh | ECCO hybrid inverter | EPS backup | From ~£4,995 installed
Fox ESS
Fox ESS is a BloombergNEF Tier 1 manufacturer producing reliable LiFePO4 hybrid inverters and modular batteries with IP65 outdoor ratings. Key models include the EC2900 (2.88 kWh stackable module), EP5 (5.18 kWh), and EP12 (11.52 kWh with a market-leading 11.52 kW charge/discharge rate). The Fox Cloud 2.0 monitoring platform supports Virtual Power Plant (VPP) participation via Axle Energy and Capture AI for automated grid arbitrage income.
Modular from 2.88 kWh | 10–12 year warranty | VPP compatible | IP65 rated
Sigenergy
Sigenergy's award-winning SigenStor is a 5-in-1 system integrating solar inverter, EV DC charger, battery power conversion, battery pack, and energy management in a single unit. SigenStor BAT models range from 4.5–9.04 kWh usable capacity and are built with LFP chemistry rated to 10,000 cycles (100% depth of discharge), IP66 weatherproofing, and AI-powered optimisation. A 5 kW installed system starts from ~£5,499. Ideal for homes wanting a single, integrated future-proof energy hub.
10,000 cycle life | IP66 | 5-in-1 system | AI optimised | Integrated EV DC charger
Explore Each Battery System
Full specifications, features, and warranty details for every battery we install. Click any system to see the complete technical breakdown.
Most PopularBattery StorageTesla
Tesla Powerwall 3
From
£8,999
The All-in-One Solar Battery with Built-In Inverter
Our #1 PickBattery StorageHanchu
Hanchu 5kW Hybrid
From
£4,999
Our Recommended System — Reliable, Powerful & Great Value
Forbes Unicorn 2023Battery StorageFox ESS
Fox ESS EVO
From
£6,499
Premium All-in-One with Magnetic Panel Design
Most InnovativeBattery StorageSigenergy
Sigenergy SigenStor
From
£7,499
Modular, Future-Proof Energy Storage with EV Charging Built In
Benefits of Battery Storage
- Use your solar energy 24/7 — store daytime solar generation for evening use, increasing self-consumption from 25–50% (solar only) to 60–80% (with battery). With an EV charger too, 90%+ is achievable.
- Blackout protection — with a hybrid inverter and battery, your home can continue running essential appliances during power cuts.
- Maximise bill savings — avoid buying expensive peak-rate electricity by using stored solar energy when grid prices are highest.
- Smart tariff optimisation — charge from the grid at 7p/kWh overnight and use that energy during the day when rates are 30p+/kWh.
- Future-proof your home — as energy prices continue to rise and the grid transitions to time-of-use pricing, a battery gives you control.
- 0% VAT on domestic installations — battery storage installed alongside or added to an existing solar system qualifies for zero-rate VAT.
How Battery Storage Works with Solar
When your solar panels generate more electricity than your home is consuming, the surplus energy flows into your battery rather than being exported to the grid. The hybrid inverter manages this process automatically, prioritising your home's loads first, then charging the battery, and only exporting once the battery is full.
In the evening, when your panels stop generating and your energy use increases, the system automatically switches to drawing power from the battery. This means you are using your own free solar energy rather than buying expensive electricity from the grid. The transition is seamless, with no interruption to your power supply.
On a typical summer day in South Yorkshire, a 10-panel solar system might generate 25-30 kWh of electricity. A household using 10 kWh during daylight hours would have 15-20 kWh of surplus. A 10 kWh battery captures a large portion of this surplus, effectively providing free electricity from late afternoon through to the following morning.
During winter months when solar generation is lower, the battery still provides value by storing any surplus daylight generation and by enabling smart tariff strategies. You can programme the battery to charge from the grid during cheap overnight periods and discharge during expensive daytime slots, saving money even when solar output is minimal.
Battery Sizing Guide
Choosing the right battery size depends on your household energy usage, solar system size, and how you want to use the battery. Here is a general guide to help you understand your options.
Starter Battery
Ideal for smaller households or as an entry-level battery alongside a modest solar system. Covers evening energy usage for a 1-2 person household. Provides basic backup power for essential circuits during outages. Best suited for homes with a 3-4 kW solar system and below-average energy consumption.
Most Popular
The most popular choice for a typical 3-4 bedroom family home. Stores enough energy to power your home from late afternoon through to the following morning. Pairs perfectly with a 10-14 panel solar system. Provides meaningful backup protection during extended power cuts and maximises your self-consumption ratio.
High Demand
Designed for larger homes, properties with EV chargers, or households with high energy consumption. A larger battery captures more surplus solar energy and provides extended backup power during outages. Essential if you want to achieve near-complete energy independence from the grid.
Battery Brand Comparison
We install four of the world's leading battery brands. Here's how they compare to help you choose the right one.
| Brand | Capacity | Warranty | Typical Price |
|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh (up to 40.5 kWh) | Lifetime | £7,500–£11,500 |
| Hanchu | 5.12–81.92 kWh | Lifetime | From £4,995 |
| Fox ESS Popular | 2.88–20+ kWh modular | Lifetime | £3,000–£6,000+ |
| Sigenergy | 4.5–9 kWh (expandable) | Lifetime | £5,499–£7,500+ |
| GivEnergy UK-based | 2.6–13.5 kWh (AIO 13.5 kWh) | Lifetime | £3,800–£8,553+ |
Prices are guide figures. Exact cost depends on system size, installation complexity, and any additional components. All prices include 0% VAT when combined with solar. Get a personalised quote.
Inverter Types: DC, AC, and Hybrid Coupling
How your battery connects to your solar panels affects efficiency and cost. The right coupling depends on whether you're installing solar and battery together or retrofitting a battery to existing panels.
DC-Coupled (Hybrid)
Solar energy flows directly from the panels into the battery via a single hybrid inverter, with only one DC-to-AC conversion. Round-trip efficiency: 95–98%.
Best for new installs where solar and battery are installed at the same time. Tesla Powerwall 3 and Fox ESS hybrid inverters use DC coupling.
- Highest efficiency
- Fewer components
- Best for new installs
AC-Coupled
Solar panels connect to a standard solar inverter, and a separate battery inverter connects to the AC circuit. Three conversion steps reduce efficiency to 89–94%.
Best for retrofitting a battery to existing solar. Works with any existing solar PV installation regardless of brand or age.
- Compatible with existing solar
- Can also charge from grid
- Slightly lower efficiency
Hybrid-Coupled
Combines AC and DC paths to achieve near DC-coupled efficiency with retrofit flexibility. Suitable for complex systems or phased installations where solar is added first.
GivEnergy's All-in-One (AIO) and Fox ESS H3 Pro are examples of hybrid-coupled approaches offering the best compromise.
- Near DC efficiency
- Retrofit flexibility
- More complex setup
Battery Lifespan: What to Expect
Modern LFP (lithium iron phosphate) batteries degrade at approximately 1–2% capacity per year. The typical lifespan is 10–15 years, with well-managed systems lasting up to 20 years. At 10 years, most batteries retain 70–80% of their original capacity.
Cycle life varies by brand: Sigenergy offers the highest at 10,000 cycles (LFP, 100% DoD), while Tesla Powerwall 3, Fox ESS, and GivEnergy are rated at 6,000+ cycles. At one full cycle per day, 6,000 cycles equals 16+ years of operation.
ElectriFusion Solutions provides lifetime warranties on all batteries we install — covering both product defects and capacity degradation beyond warranty thresholds, subject to terms. All our brands use LFP chemistry, which is safer and longer-lasting than NMC alternatives used in some older systems.
Maximise Returns with Time-of-Use Tariffs
A battery transforms your home from a passive electricity consumer into an active energy trader. These tariffs are designed for battery owners.
| Tariff | Off-Peak Rate | Peak Rate | Est. Annual Saving |
|---|---|---|---|
| Octopus Intelligent Flux | 14.99p (2–5am) | 34.97p (4–7pm) | £200–£350+/yr |
| Intelligent Octopus Go | 7p (23:30–05:30) | Standard rate | £150–£280/yr |
| Octopus Agile | Variable (avg ~15p) | Variable (up to 100p) | £100–£250/yr |
| Octopus Cosy | 12.92p (3 windows) | 39.53p (4–7pm) | £80–£200/yr |
Virtual Power Plant (VPP) Income
Battery owners can now earn additional income by joining a Virtual Power Plant — a network of home batteries that respond to grid demand signals. The grid operator pays you to discharge your battery at peak times, reducing stress on the network.
- Tesla VPP via Octopus Energy (launched UK July 2025): earn up to £300/month
- Fox ESS VPP via Axle Energy / Capture AI: automated arbitrage, no action required
- Octopus Intelligent Flux: manages battery remotely; holds 20% reserve, dispatches 80% at peak
Battery Without Solar
A battery is worthwhile even without solar panels — through time-of-use tariff arbitrage. Charge at 7–10p/kWh overnight, discharge at 24–35p/kWh during the day. A 10 kWh battery cycling daily saves approximately £2.10/day — around £766/year. On a £5,000 system, payback is approximately 6.5 years.
Standalone battery also qualifies for:
- • 0% VAT (standalone batteries included since February 2024)
- • VPP income programmes
- • Smart tariff optimisation
- • Backup power during outages (with EPS)
Real Results: Sarah, Bessacarr, Doncaster
4-bed detached house · 12 solar panels (5.3 kW) · 10 kWh Fox ESS battery
Installed: Summer 2024 · Bessacarr, Doncaster
70%
Self-consumption rate (up from 35% without battery)
£1,350
Annual electricity savings since installation
5.8 yrs
Expected payback on complete system
"The battery was a game-changer. We used to export most of our solar for pennies. Now we use it in the evening when grid rates are 30p+/kWh. Our bills dropped from £170/month to £35/month."
Don't Have Solar Panels Yet?
Get the most from battery storage by pairing it with a solar system. We offer complete solar + battery packages with significant savings vs. installing separately.
Battery Storage Warranty
ElectriFusion Solutions provides a Lifetime warranty on all battery storage systems we install. This is one of the most comprehensive battery warranties in the UK. The batteries we install are rated for 6,000 to 10,000 charge cycles, which translates to 15 to 25 years of daily use. Our 15 years workmanship warranty covers the installation itself, including all wiring, mounting, and inverter connections. Your investment is fully protected for the long term.
Got Questions? We Have Answers.
Everything you need to know about solar panels, battery storage, and working with ElectriFusion Solutions.
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Battery Storage Installation Near You
We install battery storage systems across South Yorkshire and beyond. Whether you are adding a battery to an existing solar system or installing a complete solar and battery package, we cover your area.
Pair Your Battery With These
Battery storage works best as part of a complete home energy system.
Solar Installation Bundles
Combine services for a better price and a single seamless installation. All bundles include MCS certification, 0% VAT, and our industry-leading warranties.
Solar Only
From £4,999
or from £84/mo on 0% finance
- 4-10 kWp AIKO solar panels
- Premium inverter (lifetime warranty)
- 30-year panel performance warranty
- MCS-certified installation
- 0% VAT
- Smart Export Guarantee registration
Solar + Battery
From £8,499
or from £142/mo on 0% finance
Save £500 vs. buying separately
- 4-10 kWp AIKO solar panels
- Tesla / Hanchu / Fox ESS battery
- Lifetime battery warranty
- MCS-certified installation
- 0% VAT on entire bundle
- Up to 80% self-consumption
Solar + Battery + EV
From £9,499
or from £159/mo on 0% finance
Save £750 vs. buying separately
- 4-10 kWp AIKO solar panels
- Battery storage system
- 7kW smart EV charger
- Charge your car for ~2p/mile
- All warranties included
- Single coordinated installation
All prices include supply, installation, MCS certification, and 0% VAT. Exact pricing depends on property, system size, and location. Request a free, no-obligation quote.
Battery Storage Locations We Serve
MCS-certified battery storage installation across South Yorkshire, West Yorkshire, and the wider region.
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0% VAT on domestic solar & battery
UK Government scheme
Lifetime workmanship warranty included
Plus manufacturer guarantees
Smart Export Guarantee earnings from day 1
Sell surplus energy back
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200+
Installations completed
0% VAT
On all solar installs
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