Commercial Battery Storage

Solar Battery Storage Systems for Businesses

If you’re a business owner or manage a range of offices and are looking to make the most out of your solar PV panels, our commercial battery storage systems can help you maximise your panel’s capacity. Using stored energy in non-producing conditions for your business’ day to day operations, can dramatically reduce your electricity bills and costs, giving your company greater energy independence. Here at Solar Voltaics, we’re able to install solar battery storage as a standalone service, or what we’d recommend, as a total package including solar panels and inverters across the UK.


Advanced Battery Solutions

We have chosen two of the most sophisticated battery systems on the market – Tesla Powerwall 2, Givenergy and a SolaX option for homes that have a three-phase supply to manage surplus solar power. These systems come with excellent storage capacity and warranties, and work well with smart energy tariffs like Octopus Agile and Octopus Go. By pairing these batteries with a ‘time of use’ tariff, your business can significantly cut down on energy costs.

Why Choose Solar Voltaics?

  • Quality Products
  • Expertise in Solar Solutions
  • Solar and Battery Installs
  • Save on Carbon Emissions
  • Outstanding Customer Service
  • Bespoke Solutions

Accreditations & Partnerships

Solar Battery Systems We Supply

With a number of storage systems on the market, we have selected the Tesla Powerwall 2 and Givenergy as our advanced battery system choices – these systems are renowned for their extensive storage capacity and durable warranties, and are compatible with smart energy plans such as Octopus Agile and Octopus Go.

Tesla Powerwall 2

Powerwall’s lithium ion battery inherits Tesla’s proven automotive battery technology to power your home safely and economically. An integrated inverter reduces external components, which simplifies and lowers installation costs. Powerwall is a completely automated system that requires no maintenance. The Tesla Powerwall 2 AC is a fully integrated AC battery system for residential or light commercial use. Its rechargeable lithium-ion battery pack provides energy storage for solar self-consumption, load shifting and backup power.

  • Fully installed from £9,550 + VAT (No VAT if installed with Solar!)
  • Large stocks on order.


Hybrid inverters are ideal when installing solar and battery storage at the same time. The hybrid inverter converts DC power from the solar panels into AC mains power, but also manages when to charge and discharge the battery. Because all this happens in one unit it reduces the overall cost of the system whilst maintaining high efficiencies.

AC Coupled inverters are ideal where a solar PV system is already installed with an existing inverter. The addition of the AC coupled coupled inverter is purely for managing the battery charge and discharge.

  • Fully installed from £3,542 + VAT (AC Coupled + 2.6KWh battery) (No VAT if installed with Solar!)

Key Facts about Commercial Battery Storage

Commercial battery storage is a cutting-edge technology that revolutionises the way businesses manage their energy needs. These systems work by storing excess electricity generated from renewable sources, such as solar panels, during periods of high energy production. When energy demand is high or during nighttime hours, the stored power is seamlessly released, ensuring a continuous and reliable energy supply. This not only enhances energy self-sufficiency but also allows businesses to reduce their reliance on the grid and optimise their energy costs.

Commercial battery storage systems enable businesses to store surplus energy generated from sources like solar panels, ensuring a dependable energy supply when required. This practical technology enhances energy self-sufficiency and reduces costs by reducing reliance on the conventional grid.

Tesla Powerwall 2 and Givenergy are standout choices in the commercial battery storage field, known for their robust storage capacity and dependable warranties, offering businesses peace of mind. They also seamlessly integrate with smart energy tariffs like Octopus Agile and Octopus Go, helping businesses align energy usage with tariff rates, leading to cost savings and enhanced overall efficiency.

Commercial battery storage systems are crucial for businesses to help them meet sustainability goals and ensure a reliable power supply. It allows companies to use renewable energy efficiently and improve their operational resilience. Whether a small business or a large corporation, adopting commercial battery storage systems is a smart investment in energy sustainability and cost-effective operations.

Understanding Solar Battery Storage

Your solar PV system without Battery Storage

The solar PV system on your roof will generate electricity during the day that you can use in your home. Without a means of storing that solar electricity, any surplus energy that you don’t use is ‘exported’ to the local grid. During times when the panels are no longer generating (or not generating enough for your needs), you need to buy electricity back from your electricity supplier.

Solar PV with added Battery Storage – How it Works

‘Energy storage’ lets you store the surplus solar electricity, instead of exporting it. Battery storage lets you use more of your solar PV system’s output (in the jargon, it ‘increases ‘self-consumption’). This reduces the amount of grid electricity you need to buy, saving you money on your electricity bill.

How Solar Storage Can Help

During the day:

  • The solar PV system generates solar electricity.
  • The solar battery storage system will check if all the generation is being used to power your lights and appliances.
  • If you’re not using all the electricity that the solar PV system is generating, then the system will ensure that any surplus energy is used to charge the battery.
  • Once the battery is fully charged, if there is still more solar electricity being generated, this will be exported to the grid (or in some systems, will be diverted to other uses e.g. to an immersion heater).

In the evening or at time of low solar weather:

  • The solar PV panels have a reduced or zero output.
  • The battery system can discharge the stored electricity, providing you with renewable-generated electricity at no additional cost.
  • Once the battery is discharged, if you need to use more electricity, you buy it from your electricity supplier.

Frequently Asked Questions

What size battery capacity do I need?

Solar Battery storage systems within businesses are often provided with a capacity rating in kiloWattHours (kWh). Storage batteries for a grid connected solar PV storage system are typically around 2kW to 20kWh. This is the capability of the battery to provide power. All batteries lose some energy in charging and discharging (typically around 10%), though some have better ‘charge-discharge efficiency’ than others. Most batteries are not designed to be routinely fully discharged (can reduce battery life). Some have deeper discharge capability than others.

Why should I think about battery storage?

Adding battery storage to your solar PV system enables you to store any excess solar energy to use in your property at a later date. This means that at night or in low solar weather, the battery can power your property without needing to use the grid. This saves you money on your electricity bills as you will only start buying energy when the battery runs out. Many energy providers now have flexible tariffs where you can use a cheaper night rate tariff to charge your battery too.

What is a solar battery system's lifetime cycle?

A battery’s efficient lifetime depends on the technology and the way the battery is used – significantly on the number of ‘cycles’ (complete full battery charge and discharge) that they undergo. Manufacturers generally give an expected lifetime in years and / or in ‘charge-discharge cycles’.

For example:

‘Life expectancy = 10 years or 10,000 cycles, whichever is the sooner’ Lithium-ion batteries last longer than lead-acid: you may see a 10-year lifetime expectancy claimed and this is improving all the time. Normally the solar battery storage system will monitor the battery performance and should give you an indication when your batteries need replacing.

Do battery storage systems work in power cuts?

Despite expectations, some storage systems will not provide power during a power-cut. Some solar battery storage systems however do have an ‘off-grid’ functionality, providing a limited amount of power to your home, or to essential equipment (such as your fridge-freezer, lighting etc). But a battery may run out of power before the power cut ends – or have already run out of power if it’s been discharging all evening and the power outage starts late at night or early in the morning. If you require your battery storage system to provide power during power-cuts it is important to talk this through with us from the outset as the system will need to be carefully designed and set-up to your specific requirements.

Where is the battery installed?

Most batteries that we install are rated as IP65, meaning they can be installed outdoors. However they should have a canopy over them to protect them from the elements. They can also be installed inside your property on a wall. They ideally need 300mm clearance around them for ventilation and cooling as well as access for any future maintenance. Dimensions of the batteries can be found on the datasheets.

How do I know if I need a battery?

If you have a medium to high consumption of energy, it is likely that a battery alongside your solar will be beneficial. We use our software to calculate how much of the battery you will use with your property’s consumption and can compare what your usage would be with and without a battery. You can then decide which system will work best for you and your energy consumption.

What could a solar battery storage system power?

A fully-charged medium-sized system could store sufficient energy to power during the evening your lights and lower-powered items like your fridge-freezer, TV and laptop. Over four or five hours, all of these together will use at most a few “units” or kiloWatt-hours (kWh), of electricity. However, the battery will quickly run out if you put on high energy use devices like the washing-machine or tumble-dryer: these can consume 2 – 3kWh in a single use. The higher capacity your battery is, the longer you can run your home without buying power from the grid. And in winter, the battery might not receive enough energy from your solar panels to provide for even the lower-powered items for many hours. You can compensate for this though by automatically charging your battery up at night on a cheap off-peak tariff.

Why Choose Solar Voltaics?

CHAS (Construction Health and Safety) & Microgeneration Certification Scheme (MCS)

Solar Voltaics is accredited under the CHAS (Construction Health and Safety) scheme. We are experienced in working on construction sites and operating to strict safety standards.

All installations are carried out to the standards laid down by the Microgeneration Certification Scheme (MCS). We are regularly audited by NAPIT to confirm that our workmanship standards are up to the required quality levels.

No Sub-Contracting

At Solar Voltaics we prefer not to sub-contract to other companies. We stand by the quality and professionalism of our installations, because we manage them all with our own professionally trained staff.


We are more than happy to put you in touch with previous clients who can vouch for how we performed for them. Our solar PV experts understand that this is good commercial practice and we have plenty of clients that we can refer you to, including public sector, private companies and institutions in the UK.

Get in Touch With a Local Installer

Call now to learn how little it takes to get started, and how much you can save when your solar battery storage system is in place.

We don’t do a hard sell. You can have as much or as little information as you like and we won’t hassle you with unwanted follow-up sales calls. Most of our clients want to do their own research and due diligence and we will gladly supply any information you require regarding our trustworthiness and commercial standing.

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Solar Voltaics Ltd
Bramley Barn, Main Road
West Sussex
PO18 8XA

Our Testimonials

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    • Fantastic job by the Solar Voltaics team. Very polite, professional and tidy. Would certainly recommend. Currently enjoying free energy on the evening of the installation.

    • Solar Voltaics have been superb from start to finish. So good to deal with a human company, no phone queues, quick and thorough survey, very clear explanations of the planned installation. The installers were all great, very tidy and quick. The price has been very competitive and the system is up and running well. Couldn’t recommend them more highly.

    • Fantastic from initial phone call, through to installation, commission, MCS & G99. Very helpful to the non-experts like me and always open to give advice and guidance.

      Competitive price by a very trusted business and it has been a pleasure to use Solar Voltaics!

    • Really good service and support.

    • Solar Voltaics recently installed Solar on my property very professionally from start to finish would recommend.


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