Name: Energy2 Smart Battery Storage System
Brand: Energy2
Price: 9499 GBP
Availability: InStock
Rating: 4.8 (150 reviews)

At Energy2, we've reimagined how homes and businesses across Britain are powered.

We believe true progress doesn't come from complexity, but from making technology simple, elegant, and reliable.

Every Energy2 system is designed, manufactured, installed, and supported in-house - a rare, end-to-end approach that ensures the highest standards at every step.

Built here in Britain, our technology reflects the same resilience, integrity, and craftsmanship that define the homes we power.

We're proud to share what we've created and we'd love for you to join us on this journey toward independent energy.

Shaun Butler
Founder, Energy2

Cutting your electricity bill

Energy2 batteries in garage with electric car charging and solar panels

Family relaxing at home powered by Energy2 batteries

Our batteries charge overnight when electricity prices drop - often as low as 7p per kWh - and discharge during the day when rates rise to 26p or more.

The result – a home that powers itself intelligently, reducing your energy costs by up to 75% with a typical payback period of between 4 and 6 years.

Your heating, lights, and appliances run on energy you've stored yourself, giving you predictable, stable bills no matter what happens in the wider market.

"The world of heat pumps, batteries and solar is a minefield. Shaun guided us through it and gave us exactly what we needed, for the right price."

— Larry, Oxford installation
34kWh battery

The low-carbon choice

The most effective step a homeowner can take to reduce their carbon footprint isn't installing solar panels, over-insulating, or even buying an electric car – it's stopping burning fuel at home.

A heat pump, powered by electricity from Energy2 batteries, is significantly cleaner as the national grid transitions to renewable energy during off-peak hours.

The stored, low-carbon power then runs your home and your heat pump efficiently throughout the day – giving you a heating system that is:

Up to 4× more efficient than burning fuel
Up to 4× cheaper thanks to intelligent off-peak charging

The result is a sustainable, affordable and independent home energy system that works in harmony with Britain's renewable grid – no solar panels required, no compromise in comfort.

"Thanks to the solar and battery energy savings on our school, we're proud to have retained a teaching assistant - it will have a lasting impact on our pupils."

— David, St Johns School, Buckinghamshire
50kWh battery

The Energy2 difference

🇬🇧

Designed, Manufactured & Installed in Britain

British engineering excellence with local support and service you can trust

⚡

Over 20% More Capacity Than Tesla Powerwall 3

17kWh vs Tesla's 13.5kWh - superior energy density in the same space

🛡️

15-Year Warranty

Industry-leading warranty vs 10 years from competitors - we stand behind our quality

💷

Lowest Cost Per kWh

£400/kWh - exceptional value with industry-leading cost efficiency

🔋

32 Years Daily Cycle Life

Exceptional longevity with up to 11,680 daily charge cycles - built to last

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📈

Scalable 16-256kWh Modules

Start small and expand as your energy needs grow

🔧

Made by Installers for Installers

Rapid installation process designed by industry professionals

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Innovative visual glow display

See the battery status and charge level from any angle or distance

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Multi-Inverter Compatible

Works with all major inverter manufacturers for maximum flexibility

>>>>>>> Stashed changes

🏠

Full Off-Grid Capability

Complete energy independence when you need it most - power through any outage

📈

Scalable 17-272kWh Modules

Start small and expand as your energy needs grow - future-proof your investment

<<<<<<< Updated upstream

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One Day Installation

Professional installation completed in as little as one day - start saving immediately

Ready to experience the Energy2 difference?

Calculate Your Savings

How Energy2 Compares

See why Energy2 offers the best value for British homes

Feature	Energy2 Recommended	Tesla Powerwall 3	Grid Only
Capacity per Unit	17 kWh	13.5 kWh	N/A
Made in Britain	✓	✗	—
Warranty Period	15 years	10 years	—
Cost per kWh	£400	£520	—
Off-Grid Capable	✓	✓	✗
Daily Cycle Life	32 years	25 years	—
Typical Electricity Cost	7p/kWh (off-peak)	7p/kWh (off-peak)	26p/kWh average
Payback Period	4-6 years	6-8 years	Never
Monthly Bill Savings	Up to 75%	Up to 70%	£0
Local Support	✓ British team	✗ International	—
Installation Time	1 day	1-2 days	—
34kWh System Investment	£13,600 or £227/month	£17,680 Higher upfront	£0 Pay forever

Ready to make the smart choice?

Get Your Free Quote

Go off-grid

Beautiful British village with Energy2 providing energy independence

When the grid is available, your system buys and sells power intelligently – taking advantage of dynamic pricing and grid opportunities.

But what happens when the grid goes down? Energy2 gives you energy independence, helping you operate with no compromise in comfort or capability.

When energy storage becomes the heart of the building, the property itself transforms – from a passive consumer of energy into an intelligent, living system.

It's the model for the future of British buildings: resilient, independent, and self-sufficient.

"The knowledge and expertise of Energy2 is so far ahead - it comes across in the first few minutes of talking with them."

— Alex, Buckinghamshire installation

Frequently Asked Questions

Everything you need to know about Energy2 battery storage

How long does installation take?

Most installations are completed in just one day. Our expert team handles everything from delivery to setup, testing, and activation. We'll arrange a convenient date that works for you, and you'll be saving money from day one.

Do I need solar panels to use Energy2 batteries?

No! Energy2 batteries work perfectly without solar panels. They charge from the grid during cheap off-peak hours (as low as 7p/kWh) and discharge during expensive peak hours, saving you up to 75% on electricity bills. Solar panels are optional and can be added later.

What happens if the grid goes down?

Your home stays powered! Energy2 systems include full off-grid capability. When the grid fails, your batteries automatically switch to backup mode, keeping your lights, heating, refrigerator, and essential appliances running.

What's covered by the 15-year warranty?

Our industry-leading 15-year warranty covers all battery components, manufacturing defects, and performance guarantees. Unlike competitors offering 10 years, we stand behind our British engineering with the longest warranty in the industry. Plus, our batteries are designed for 32 years of daily cycling.

How much does an Energy2 system cost?

Pricing depends on your energy usage and system size. A typical 34kWh system costs around £13,600, with savings of £140-180/month. We offer 0% finance options from £227/month. Use our calculator above for a personalized quote, or book a free home survey for an exact price.

Can I expand my system later?

Yes! Energy2 batteries are fully modular (17kWh per unit). Start with one battery and add more as your energy needs grow - perfect if you're planning to get an electric car or heat pump later. Our systems scale from 17kWh to 272kWh.

How is Energy2 different from Tesla Powerwall?

Energy2 offers 20% more capacity per unit (17kWh vs Tesla's 13.5kWh), is made in Britain with local support, includes a 15-year warranty (vs 10 years), and has the lowest cost per kWh in the industry. Plus, we design, manufacture, install, and support everything in-house.

What's the typical payback period?

Most customers see full payback in 4-6 years. After that, it's pure profit - saving you £1,500-2,500 every year for decades. With our 15-year warranty and 32-year lifespan, you'll save well over £30,000 over the system's lifetime.

Do you offer financing?

Yes! We offer 0% finance over 60 months with approved credit. A typical 34kWh system is £227/month, but you save £144/month on electricity, making your net cost just £83/month. After 5 years, the system is paid off and you keep saving £144+ every month.

Is my home suitable for battery storage?

Most homes are perfect for Energy2! You just need: adequate wall space (82cm × 42cm × 26cm per unit), access to your electricity meter, and a grid connection. We offer a free home survey to assess your property and recommend the ideal system size. Book yours today!

See Your Savings

Calculate how much you could save with energy2 battery energy storage

Your daily energy usage

Manual adjustment

25 kWh per day

£54

saved per month

was £203 now £149

£648

saved per year

was £2,436 now £1,788

Save £60 per month

with energy2 battery storage

System payback in N/A

Yearly Costs

Without Battery: £0

With Battery: £0

Recommended system for your savings

34 kWh

Battery capacity

Available in 17kWh modules

2 units needed

⚡

5 kW

Inverter power

3.68, 5, 8, 10, 15kW available (parallel compatible)

Your Investment

Full Payment

0% Finance

No Interest

Monthly Payment (60 months)

£227

Monthly Savings +£144

                                        Net Monthly Cost
                                        £83
                                    

After 5 Years Fully Paid + £8,640 Saved

✓ No obligation quote | ✓ Free home survey | ✓ Installation in 1 day

✓ 15-year warranty | ✓ Made in Britain | ✓ MCS certified

How we calculate your savings: Your 34kWh battery system (17kWh modules) shifts 17.5kWh of energy from expensive peak hours (26p/kWh) to cheap overnight rates (7p/kWh), saving 19p per kWh shifted. With your 5kW inverter, the batteries charge in approximately 6.8 hours during the overnight window. We account for 90% round-trip efficiency (10% energy loss), exclude standing charges as they remain constant, and assume 70% of your daily usage occurs during peak hours. Typical savings of up to 75% with a 4-6 year payback period. Real savings vary based on actual usage patterns, tariff rates, and seasonal variations.