Battery Storage · For your business

Energy storage that keeps a business running.

Store what you generate, shave your peak demand, and stay operational through an outage. Commercial battery systems sized around how your site actually uses power.

Government-approved & certified Fully funded solutions available 5 year installation warranty 5 kWh to hundreds of kWh
Commercial storage

Plan your energy, don’t just buy it.

Thanks to the development of commercial battery storage, businesses can now manage their energy consumption while making effective long-term plans.

Onsite storage lets you hold any excess energy produced, so you can function independently of the grid and draw on backup power when demand — or price — is high.

We manage the whole project in-house: site surveys, DNO applications, structural checks, installation and commissioning. You get a dedicated point of contact and a system sized to your usage, your site layout and your long-term goals.

Peak-demand shaving
Backup for critical circuits
Sell excess back to the grid
Retrofits to existing solar
Modular and scalable
Full documentation and warranties
Commercial battery storage installation
10+ yrs Typical system warranty
Benefits

Why businesses add storage.

Stay operational

Power cut? No problem. Remain operational in the event of an outage on the main grid.

Cost-effective

Release self-generated energy when peak electricity prices kick in, and sell your excess back to the grid.

Meet your targets

Keep pace with government commitments on carbon reduction and evidence it with real generation data.

Scalability

Grow your set-up the way you need it, when you need it, without replacing what you already have.

Proven experience

Accredited, insured and always accountable.

Since 2011 we’ve helped hundreds of businesses, schools, public sector organisations and community buildings transition to clean energy — from multi-site solar and battery installations to bespoke storage systems.

All commercial installations are carried out by our own team of experienced, MCS-accredited engineers. We’re fully insured and committed to the highest standards of safety, compliance and quality. Every project is backed by robust product warranties and full documentation.

We only install products we would use in our own offices — which is why we work with Tesla and Sigenergy.

NICEIC
MCS
Trading Standards
RECC
CHAS
ESPO framework supplier
Commercial battery installation detail
Reviews

What our customers say.

We’re proud to work with homeowners and businesses across the UK, helping them save energy and money with smart, sustainable solutions. Here’s what some of our happy customers have to say about their experience with Bright Spark.

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5.0 ★★★★★
Verified Google Reviews
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Jody Roderick
★★★★★
G

“Bright Spark provided a comprehensive and detailed quotation for a solar panel system with battery and followed this up with clear communication throughout the installation. The team were professional and dedicated to the task while making sure to keep us informed and updated as the work was completed. We highly recommend the Bright Spark team.”

Posted on GoogleVerified review
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Mike Hook
★★★★★
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“Bright Spark recently installed a SolarEdge Solar, Battery and EV charger for us. The system is working great and the installation went smoothly, I’d recommend for anyone looking to get Solar renewables.”

Posted on GoogleVerified review
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Alistair Dodwell
★★★★★
G

“Thanks guys. Now with a pair of Solar Edge battery packs for 20 KWH storage. Great team and good communication with updates on progress of installation with Solar Edge team. Rock on summer.”

Posted on GoogleVerified review
BH
Brad Harknett
★★★★★
G

“A fantastic company with fantastic results, I couldn’t have had a better experience with the team at Bright Spark. The plans were very detailed, the fitting and handover were very impressive, I have recommended my parents to have the same system. Thank you so much to the team.”

Posted on GoogleVerified review
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Chris Daykin
★★★★★
G

“Bright Spark recently installed a SolarEdge Solar, Battery and EV charger for us. The system is working great and the installation went smoothly, I’d recommend for anyone looking to get Solar renewables.”

Posted on GoogleVerified review
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Sarah, Bath
★★★★★
G

“Bright Spark gave us confidence from the start. The solar and battery install was seamless and we’re already seeing savings!”

Posted on GoogleVerified review
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Colin M
★★★★★
G

“I was very impressed with this company from start to finish. Their quotation and accompanying project plan was extremely comprehensive, and they answered any questions I had immediately. My panels and battery system (Sigenergy) took two days to fit, and the guys were all very friendly, worked extremely hard and long hours, and left everything very neat and tidy, a real quality installation. All the post installation documentation was provided quickly as promised, they handled all the liaison with the network provider, and helped set up the app. The system is working really well and I would recommend this company wholeheartedly.”

Posted on GoogleVerified review
FAQs

Commercial battery storage, explained.

How much energy can a commercial battery store?

Commercial systems are modular and scalable. We design around your usage patterns, site needs and goals — from 5 kWh for a small business to hundreds of kWh for large or multi-site operations.

What types of business are a good fit?

Any business with high energy usage, variable operating hours, or a desire to reduce grid reliance. We work with schools, warehouses, manufacturers, offices, hospitality venues and public buildings.

How long do commercial batteries last?

Most commercial-grade batteries come with 10+ year warranties and are designed to last well beyond that with proper maintenance. We only supply trusted, high-performance brands with strong manufacturer support.

Will the battery work during a power cut?

Yes — if you opt for a system with backup functionality. Your battery automatically powers essential circuits like lighting, refrigeration and internet.

What’s involved in the installation process?

We manage the entire project in-house — site surveys, DNO applications, structural checks, equipment installation and commissioning. You’ll have a dedicated project manager and minimal disruption.

Will I need planning permission?

In most cases battery systems don’t require planning permission. We assess each site individually and advise if permissions are needed, particularly for listed buildings or conservation areas.

Can I add storage to an existing solar system?

Yes. We regularly retrofit battery storage to existing commercial solar PV. We’ll check compatibility and advise on any changes needed for smooth integration.

Accredited & certified
MCS certified installer NICEIC approved contractor TrustMark — Government endorsed quality RECC — Renewable Energy Consumer Code OZEV approved installer ESPO framework supplier CIBSE IWA accredited
Coverage

Where we work nationwide.

Our commercial team works nationwide. We have delivered projects from Exeter and Plymouth to Bristol, Buckinghamshire, Wiltshire and right across the South Coast.

  • Sussex
  • Hampshire
  • Buckinghamshire
  • Wiltshire
  • Bristol
  • Plymouth
  • Exeter
  • London
  • The Cotswolds
  • Nationwide
Get in touch

Book your free consultation.

Tell us a little about your property and what you’re hoping to achieve. We’ll arrange a no-pressure site visit and put together a clear, itemised proposal.

Get a free quote

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