Solar energy in healthcare is no longer a niche consideration. Across the UK, hospitals and GP surgeries are turning to solar PV systems to reduce energy costs and meet sustainability targets. But a solar array alone does not guarantee the uninterrupted power supply that clinical environments depend on.
That is where battery storage comes in. Understanding the benefits of battery storage for hospitals and medical facilities is the first step towards building an energy strategy that is both financially sound and operationally resilient.
What Are Battery Storage Solutions?
A battery storage solution is a system that captures surplus electricity generated by solar panels and holds it in reserve for use later. Rather than allowing excess energy to go to waste or be exported back to the grid at a low rate, the system stores it on-site so it can be drawn upon when generation drops off or demand increases.
In a typical commercial installation, solar panels generate a direct current (DC), which passes through an inverter and is converted to alternating current (AC) before being fed into the building’s electrical system. Any surplus energy storage takes place in battery units, most commonly lithium-ion technology, which offers a reliable combination of high efficiency, long cycle life, and compact footprint.
Battery management systems monitor charge and discharge activity continuously, ensuring the batteries operate safely within their designed parameters and that energy is available when it is needed most.
The Importance of Backup Power in Hospitals
In most commercial settings, an unexpected power cut is an inconvenience. In a hospital or medical facility, it is something else entirely. Hospital power solutions must account for equipment that cannot simply pause: ventilators, infusion pumps, surgical lighting, dialysis machines, and patient monitoring systems all require a continuous and stable electricity supply. Any interruption carries genuine risk, including risk to life.
Research by ABB suggests that a single hospital power outage can cost upwards of £6,000 per minute [1]. Hospitals in the UK are required under Health Technical Memorandum HTM 06-01 to plan and mitigate the risks of serious interruption to power supply [2]. Traditional backup generators help, but they are not instantaneous and depend on fuel that must be stored and maintained. A properly integrated battery system provides immediate, seamless cover.
Key risks that robust backup power planning must address include:
- Failure of life-critical equipment such as ventilators and surgical systems
- Spoilage of temperature-sensitive medications, blood products, and biological samples
- Loss of patient data from clinical IT systems during unplanned shutdowns
- Inability to accept emergency admissions during prolonged outages
This all leads us into the benefits of battery storage for hospitals, which we’ll discuss next.
Benefits of Battery Storage for Hospitals and Medical Facilities
The benefits of battery storage for hospitals go well beyond simply keeping the lights on during a grid failure. A well-designed system improves the overall energy performance of a facility and delivers returns that accumulate across the lifetime of the installation.
- Uninterrupted Power Supply: Battery storage provides near-instantaneous response to a grid outage, switching to stored energy in milliseconds. This makes it fundamentally different from a generator, which takes time to come online. For critical medical areas, that difference matters.
- Energy Efficiency and Cost Reduction: Hospitals are high-demand sites and are frequently subject to peak-time energy tariffs. A battery storage system allows facility managers to draw from stored energy during those high-cost periods rather than pulling from the grid at peak rates, reducing energy bills in a meaningful and measurable way.
- Enhanced Use of Solar Generation: Without energy storage, any solar electricity generated beyond what the building is consuming in real time is either wasted or exported at a low feed-in rate. With storage, that surplus is captured and used on-site, improving the overall return on the solar investment and reducing grid dependency throughout the day and into the evening.
- Reduced Carbon Footprint: Combining solar energy in healthcare settings with battery storage means a greater proportion of a facility’s power comes from renewable generation. That directly reduces carbon emissions and supports NHS Net Zero commitments, which require the health service to reach net zero by 2040 for directly controlled emissions [3].
- Long-term Financial Resilience: Backup power failures cost money, but so does grid electricity at commercial rates. A solar and storage combination protects against both. With return on investment achievable in as little as two years, the financial case for battery storage in healthcare is straightforward to build.
A Detailed Guide to Battery Storage Solutions for Backup Power in Medical Solar PV Systems
NHS England’s Estates Returns Information Collection data for 2023/24 shows that total energy usage across the NHS estate reached 11.1 billion kWh in a single year [4], making the health service one of the country’s largest energy consumers.
For individual trusts and facilities, that translates into substantial ongoing costs. Integrating battery storage solutions with a medical solar PV system is one of the most practical ways to begin reducing that figure.
- System Design and Integration: A battery system for a healthcare facility must be sized to the site’s specific energy profile, accounting for peak demand periods, the capacity of the solar array, and the critical loads that must be maintained during any outage. ProStar Energy carries out a thorough site survey before recommending any system, ensuring the design reflects real operational data.
- Scalability: Medical facilities range from small GP surgeries to large acute hospital sites. Battery storage is modular, meaning capacity can be added as demand grows or as additional solar generation comes online.
- Maintenance and Monitoring: Once installed, a battery energy storage system requires relatively low ongoing maintenance. Remote monitoring platforms track performance in real time, and ProStar Energy supports clients through aftercare and servicing packages, with manufacturer guarantees tracked through our CRM system.
- Integration with Existing Infrastructure: Battery storage can often be retrofitted to existing solar installations. For new medical solar PV systems, designing the solar and storage elements together from the outset delivers the most efficient outcome.
Why Choose ProStar Energy?
ProStar Energy brings more than 50 years of combined engineering expertise to every project we take on. Our team holds BS7671 qualification and the BPEC Solar PV and energy storage qualification, and we apply that technical depth to every stage of a project, from initial site survey through to commissioning and aftercare.
For healthcare clients, the detail done at the outset is what determines the outcome. We take the time to understand the specific demands of each site before recommending a system, and we design every installation around the facility’s actual energy profile rather than a generic specification.
Our full turn-key service covers planning, design, project management, installation, and ongoing support, so your team is not left to manage the complexity of a major energy project without experienced guidance.
We consistently maintain a five-star service rating, and our two-year workmanship warranty is backed by structured servicing packages.
Take the Next Step for Your Facility
Understanding the benefits of battery storage for hospitals and medical facilities is one thing. Putting together a system that is properly specified for your site is another, and that is where ProStar Energy can help. Whether you are exploring battery storage solutions for the first time or looking to add storage to an existing solar installation, our engineers are ready to carry out a free site survey and talk through the options in practical terms.
To arrange a consultation or request a free site survey, complete our contact form or call us on 03316 302 225. There is no obligation and no sales pressure, just a straightforward conversation about what the right system would look like for your facility.
References
[1] Hospital Hub, “Research by ABB suggests that a single hospital power outage can cost upwards of £6,000 per minute”: https://hubpublishing.co.uk/modernising-hospitals-without-compromising-power-reliability/
[2] NHS England, “Hospitals in the UK are required under Health Technical Memorandum HTM 06-01 to plan and mitigate the risks of serious interruption to power supply”: https://www.england.nhs.uk/wp-content/uploads/2021/05/Health_tech_memo_0601.pdf
[3] NHS England, “That directly reduces carbon emissions and supports NHS Net Zero commitments, which require the health service to reach net zero by 2040 for directly controlled emissions”: https://www.england.nhs.uk/greenernhs/a-net-zero-nhs/
[4] NHS England, “NHS England’s Estates Returns Information Collection data for 2023/24 shows that total energy usage across the NHS estate reached 11.1 billion kWh in a single year”: https://digital.nhs.uk/data-and-information/publications/statistical/estates-returns-information-collection/management-information—provisional-summary-figures-for-2023-24
