Commercial

Commercial Battery Storage in Devon

Battery storage can help Devon businesses reduce energy costs, improve energy eﬃciency and make better use of solar-generated electricity.

Battery storage allows businesses to store excess energy for use during peak demand periods and can also be installed without solar panels using off-peak electricity tariffs. At Glo Renewables, we install trusted commercial battery systems including Tesla Powerwall, Fox ESS and Sigenergy.

Benefits of Battery Storage for Businesses

Commercial battery storage systems help businesses reduce reliance on the grid, improve energy management and maximise long-term energy savings.

Reduced Energy Costs

Installing batteries allows your business to store excess electricity for use during peak-rate periods, helping reduce electricity imports and lower ongoing operational energy costs.

Energy Independence

Commercial battery systems provide businesses with greater control over energy usage by storing solar or off-peak electricity for use throughout the day. This can help your business be less reliant on energy providers and fluctuating rates.

Backup Power & Resilience

Battery storage systems can provide backup power support during outages, helping reduce downtime and maintain critical operations for commercial premises.

Stackable vs. Single Unit Battery Storage

Commercial battery storage systems can be installed with or without solar panels, although they
are most commonly paired with commercial solar systems to help businesses store excess solar
energy and reduce reliance on grid electricity. Stackable battery systems allow storage capacity
to expand over time, while single-unit systems offer a simpler all-in-one commercial setup.

Stackable

modular batteries

Lower upfront investment

Adding capacity often means adding modules rather than buying a whole second battery.

Easy to expand later

You can install “enough” now and add later (but this only works if the manufacturer supports expansion on the same platform).

Can cost more at larger capacities

Extra bases, covers, comms, mounting, and labour can make modular systems not the cheapest per kWh once fully built out.

Easy to increase storage

More module-to-module links/comms and more things to commission/diagnose.

Wide range of capacities

Adding modules later can introduce mixed ages/firmware/cell states—most systems handle it, but it can affect balancing and performance.

Ideal if your energy use may change

You can usually swap a module rather than disturbing the entire battery enclosure.

Small footprint

Needs clear height and a stable mounting location (garage/plant room typically).

Capacity grows upwards

Each module is easier to handle than a single large unit.

Great where wall space is limited

The build is a “system” rather than a single appliance.

One integrated battery stack

Clearly modular/engineered rather than a single sleek unit.

Expansion maintains a clean appearance

Adding capacity changes the look/height.

Hidden battery connections

More seams, labels, and sometimes external trunking as it expands.

Single Unit

monobloc batteries

Excellent value for fixed capacities

One unit, one set of ancillaries, fewer surprises in small-to-mid installs.

Often lower £/kWh

Increasing capacity often means adding another full unit (and sometimes extra protection/controls depending on design).

Expansion usually requires another complete battery

Fewer interconnections and fewer modules usually means faster install/commissioning (site-dependent).

Best when capacity is known from the start

Generally simpler commissioning and fewer connection points to troubleshoot.

Simple fixed-size solution

If something internal fails, it’s often the whole unit being serviced rather than a single module swap.

Less flexible to expand

Fewer “moving parts” in the architecture, but you’re locked into one manufacturer’s design and limits.

Consistent cabinet size

You know exactly what you’re mounting from day one.

Capacity grows sideways

Handling and mounting can be more awkward (and wall structure matters more).

Larger systems require more wall space

Typically fewer visible joins/connections around the battery itself.

Very clean as a single battery

Usually the neatest option on a wall.

Larger systems use multiple cabinets

If expansion is by adding a second identical unit, it can look symmetrical and intentional.

Additional batteries may require visible interconnecting cables

One enclosure is simpler to conceal with joinery (where permitted with ventilation/clearances).

	Modular (Stackable)	Single Unit
Best suited for	Customers who may expand in the future	Customers who know the storage they’ll need
Starting cost	Lower initial investment by installing fewer modules	Often better £/kWh at larger fixed capacities
Future expansion	Simply add battery modules	Usually requires another complete battery
Value over time	Easy to spread the investment over several years	Better value if expansion isn’t expected
Space required	Small footprint that grows upwards	Additional batteries require more horizontal wall space
Installation	Smaller modules are easier to move and position	Fewer but heavier battery units
Appearance	One continuous battery stack	Multiple individual batteries if expanded
Visible cabling	Usually hidden within the stack	Additional batteries require visible interconnecting cables or combiner equipment (we’ll keep them tidy though)
Servicing	Individual modules can be replaced allowing the battery to continue running.	The whole battery capacity likely needs to be isolated whilst repairs are organised.
Typical size	5–80+ kWh depending on manufacturer	Fixed battery sizes (6, 10 & 12kWh), expanded by adding more units

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frequently asked questions

your commercial solar battery storage questions answered

Below are some of the most common questions we receive from businesses across Devon about commercial battery storage and energy systems.

Can commercial battery storage be installed without solar panels?

Yes. Commercial battery storage can be installed with or without solar panels. Many Devon businesses use battery systems with off-peak electricity tariffs to reduce energy costs and improve energy management.

What are the benefits of commercial battery storage?

Commercial battery storage helps businesses reduce peak-time electricity imports, improve solar self-consumption, lower energy costs and provide greater energy resilience during outages.

Can commercial battery systems provide backup power?

Some battery systems, including Tesla Powerwall and Sigenergy, can provide backup power functionality when installed with the correct backup setup and site configuration. This is beneficial for businesses wishing to continue operations even during power outages.

What battery brands does Glo Renewables install?

Glo Renewables installs trusted battery storage systems including Tesla Powerwall, Fox ESS and Sigenergy. Systems are selected based on performance, reliability, warranty support and compatibility with your home and energy usage.

What is the difference between stackable and single-unit batteries?

Stackable battery systems allow businesses to expand storage capacity over time, while single-unit battery systems provide a simpler all-in-one energy storage solution. It all depends on your business and operational demands.

Is battery storage worth it for Devon businesses?

Battery storage is becoming increasingly popular for Devon businesses looking to reduce electricity costs, improve energy effciency and gain greater control over commercial energy usage. With rising energy prices its more important than ever to be energy smart.

How long do commercial battery systems last?

Most modern commercial battery systems are designed for daily long-term use and commonly include manufacturer warranties of around 10 years depending on the system installed.

Can battery storage be added to an existing commercial solar system?

Yes. Battery storage can often be retrofitted to existing commercial solar panel systems to help businesses store unused solar energy instead of exporting it back to the grid.

Do commercial battery systems require maintenance?

Most commercial battery systems are low maintenance and include app-based monitoring to track system performance, energy usage and battery activity in real time.

Why choose Glo Renewables for commercial battery storage in Devon?

Glo Renewables provides professional commercial battery storage installation across Devon and the South West, with systems designed around your business energy usage, property requirements and future expansion plans. Our team get to know the ins and outs of your business in order to best design the system around your commercial needs.

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Customer Reviews

Here’s what our trusted customers have to say about us at Glo Renewables

Meet the directors

5 Over 128 Reviews

David Painter 4 weeks ago

The whole process was polite, well communicated and managed. All our questions were answered exceptionally well with accurate information. It wasn’t a simple install for us, but all our issues were dealt with professionally by the team of Glo-Renewables as they came across them. The install team worked very well together and the install was top-notch. We were left with a quality install and all the certifications that we needed to support our installation, all building and electrical certificates have been supplied without asking. We Highly recommend Glo-renewables!

Robert Mankiewitz 1 month ago

Glo have been absolutely excellent. Ours was a rather complicated installation - Glo applied their minds to it and came up with a very good solution.
We thought their staff were great on site too. Highly recommended

Phil Limb 1 month ago

I can't recommend Glo Renewables enough. From the initial visit to install to post install check-in they have been so knowledgeable, professional and a joy to deal with. The install team were so polite, clean and tidy. We are now a couple of months of post install and the solar is covering all our electricity needs (including running an electric car) and we are exporting to the gird. If you are thinking of solar give them a call

John Raynolds 1 month ago

After ten years loyal service my inverter decided to give up in hot this year’s hot weather. Great if you like the smell of burning transformer might be worth checking yours. I called a few different companies who either never bothered to reply or wanted to sell me a new system with batteries, neither of which I wanted or needed.

Then I found Glo Renewables Ltd. Matthew, my first point of contact was great, really helpful and arranged for Chris the engineer to fit the new inverter shortly after. He arrived at nine in the morning and was finished by midday and a really nice bloke at that.

We all know it’s not that easy to find trades these days that are not only good at what they do but also understand the importance of great customer service at a realistic price. As a company I cannot recommend Glo Renewables highly enough.

Bottom line would I use them again? Defiantly!

Pete White 2 months ago

Fantastic service from start to finish. The whole team are friendly and professional and happy to answer any questions throughout the process. A very clean and efficient job. Highly recommend.

Jonathan Chatfield 2 months ago

I couldn’t be happier with the service I received from Glo Renewable Energy. From the initial consultation through to the installation and commissioning of my solar PV and battery storage system, the entire process was handled professionally and efficiently.

The team took the time to explain the different system options, answered every question thoroughly, and designed a solution that was tailored to my home’s energy needs rather than simply trying to sell the most expensive package. Communication was excellent throughout, with clear timelines and regular updates.

The installation team were punctual, friendly, and highly skilled. They worked neatly, treated my property with respect, and completed the installation to an exceptionally high standard. Everything was left clean and tidy, and they made sure I understood exactly how to monitor and get the most from my new PV and battery system before they left.

The quality of the workmanship is outstanding, and it’s reassuring to know the system has been installed by people who genuinely care about doing the job properly. It’s already satisfying to see my home generating its own electricity and storing excess energy for later use.

If you’re considering solar panels or battery storage, I would have no hesitation in recommending Glo Renewable Energy. Their professionalism, technical expertise, customer service, and attention to detail were first class from start to finish. An excellent local company that deserves every one of its five stars.

Donna Cowen 2 months ago

Highly recommended- excellent friendly, reliable & professional guys all round. Great App to understand what’s happening with the solar. Happy to show anyone what they’ve completed at our house .

jon huddy 2 months ago

Had solar fitted by Glo Renewables and honestly can't fault them. They came out to survey the roof and knew exactly what they were talking about, they worked around our opening times too. Even the export payment paperwork landed in my inbox before I'd thought to chase it. Service, communication and everything in between was spot on. In fact I was that happy with it all, I'm now getting them to do my house as well. Says it all really.

Michael C 2 months ago

Now added extra panels and an additional battery pack. All installed without fuss and working well. The Glo team were as helpful as ever. Very genuine company, would recommend anyone looking for a solar solution to contact Glo for a quote.