For many UK businesses, solar power has already become a proven way to reduce electricity costs and protect against volatile energy prices. But as more organisations invest in commercial solar installations, another question is becoming increasingly common:
“Should you also invest in battery storage?”
Commercial battery storage systems allow businesses to store surplus solar energy generated by their solar modules and use it when electricity prices are highest or in the evenings. For some organisations, this can significantly improve energy savings and operational resilience. For others, the benefits may be more limited.
In this guide, we explain how commercial battery storage works, when it makes financial sense and whether it is the right addition to your business energy strategy.
What Is Commercial Battery Storage?
Commercial battery storage systems are designed to store excess electricity generated by solar panels during the day. Instead of exporting the surplus energy back to the grid at a relatively low rate, the energy is stored and used later when your business needs it most.
Stored energy can be used:
- During evening hours when solar generation stops
- At peak tariff times when electricity costs are highest
- During grid outages or interruptions
- To reduce demand spikes that increase electricity charges
By storing energy on-site, businesses gain greater control over how and when electricity is used, helping reduce costs and improve energy reliability. As energy markets become more unpredictable and grid infrastructure faces increasing pressure, battery storage is becoming an important part of ling term business energy planning.
Key Benefits of Commercial Battery Storage
Lower Peak Demand Charges
Many commercial electricity tariffs include demand charges, which are based on the highest level of electricity your business uses during short periods, often 15-30 minutes. A battery system can discharge stored energy during these peak moments, reducing the demand spike that determines these charges.
This process is known as peak shaving and can significantly reduce electricity costs for businesses with high or irregular energy loads. Manufacturing facilities, warehouses and logistics centres, hotels and hospitality businesses and large office buildings often benefit greatly from this practice.
Business Continuity and Backup Power
Power interruptions can lead to lost productivity, disrupted operations and in some cases costly downtime. Commercial battery systems can provide backup power for critical systems, allowing essential equipment or services to continue running during grid failures.
This can be particularly valuable for businesses such as:
- Healthcare facilities
- Data centres
- Manufacturing operations
- Retail and hospitality venues
Even short outages can have financial consequences, making energy resilience increasingly important for many organisations.
Improved Return on Solar Investment
Without battery storage, surplus solar energy generated during the day is exported to the grid. While the Smart Export Guarantee (SEG) allows businesses to receive payments for exported electricity, the rate is typically much lower than the price of purchasing electricity from the grid.
Battery storage allows businesses to increase their solar self-consumption, meaning more of the power generated on-site is used within the business rather than sold back cheaply. This can significantly improve the overall return on investment from a commercial solar system.
Greater Energy Independence
Energy markets have experienced significant price volatility in recent years, making long term energy planning more difficult for businesses. Solar combined with battery storage reduces reliance on the grid by allowing organisations to generate, store and use their own electricity. This provides:
- Greater protection from energy price increases
- Improved control over operational energy costs
- Increased resilience against supply disruptions
Supporting Sustainability and ESG Targets
Many businesses are under growing pressure from stakeholders, customers and regulators to demonstrate measurable progress toward sustainability goals. Installing solar with battery storage supports Environmental, Social and Governance (ESG) initiatives by:
- Reducing reliance on fossil fuel electricity
- Lowering operational carbon emissions
- Demonstrating commitment to clean energy
For organisations working toward Net Zero targets, battery storage can help maximise the effectiveness of renewable energy investments.
When Battery Storage May Not Be Necessary
While battery systems offer many advantages, they are not always essential for every business. Battery storage may provide less financial benefit if:
- Your business operates mainly during daylight hours and uses solar energy as it is generated
- Your electricity tariff does not include demand charges
- Your priority is achieving the fastest possible solar payback period
- You currently receive a high export tariff for solar energy
In these cases, installing solar panels alone may already deliver strong financial returns. However, as energy tariffs and export rates continue to evolve, battery storage may become more attractive in the future.
Is Commercial Battery Storage Worth the Investment?
The cost of commercial battery storage depends on several factors. System size and energy capacity are the main factors determining cost, but battery technology and manufacturer can also impact price. If you already have a solar PV system installed, choosing a battery storage system that is compatible with your existing equipment will keep installation costs lower.
Although batteries increase the upfront cost of a solar installation, they can deliver long term financial benefits by reducing peak demand charges and increasing self-consumption of your generated solar energy. Battery storage increases protection against rising electricity prices, improving operational resilience and energy independence.
For many businesses, battery storage systems typically achieve a return on investment within 5-10 years, particularly when paired with solar generation and peak demand management strategies.
Choosing the Right Solar and Battery Solution
Every business has unique energy requirements, which is why careful system design is essential.
At Silvercrest Energy, we work with organisations across the South East to design tailored solar PV and battery storage solutions based on real energy usage data. Our commercial energy specialists assess:
- Your building and roof suitability
- Current electricity consumption patterns
- Tariff structures and demand charges
- Long term cost reduction opportunities
This ensures your system is properly sized, financially viable and aligned with your operational goals.
Considering Solar PV and Battery Storage for Your Business?
If your organisation is exploring ways to reduce electricity costs and increase energy independence, combining solar with battery storage could offer significant advantages. Silvercrest Energy offers commercial energy assessments and site surveys to help businesses understand their options.
Our assessments provide:
- Estimated savings from solar and battery systems
- Projected payback periods
- System sizing recommendations
- Long term ROI modelling
With energy prices expected to remain volatile, investing in on-site generation and storage can provide businesses with greater control, resilience and long term cost certainty.
