With energy prices remaining volatile and pressure growing on businesses to cut operating costs and carbon emissions, solar PV systems paired with battery storage are becoming an increasingly attractive investment, but one question comes up time and time again: how much could a solar PV system actually reduce a UK business’s electricity bills by?
The short answer is: a lot more than most business owners expect. The long answer depends on several key factors.
The typical savings: 30% to 70% off electricity bills
For most UK commercial premises, a well-designed solar PV system can reduce grid electricity costs by 30% to 50%. When battery storage is added, savings often rise to 50%–70%, and, in some cases, even higher.
Why such a wide range? Because no two businesses use energy in the same way.
What determines how much your business can save?
1. Energy usage patterns
Businesses that operate during daylight hours (such as offices, warehouses, manufacturing sites, retail units, and schools) benefit the most from solar PV. The more electricity you use while the sun is shining, the more of your power you generate and consume on-site — which is far cheaper than buying it from the grid.
If your business uses most of its energy in the evenings or overnight, battery storage allows you to store excess solar energy generated during the day and use it later, significantly increasing savings.
2. Size of the solar PV system
Larger systems generate more electricity and offset more grid power. For example:
- A 50 kW system could generate around 45,000 kWh per year
- A 100 kW system could generate around 90,000 kWh per year
At an average commercial electricity price of 25–35p per kWh, that can translate into £11,000–£31,500 in annual savings, depending on usage and system design.
3. Electricity prices and future increases
Every unit of solar energy you use is a unit you don’t buy from the grid. As electricity prices rise over time (which most forecasts expect), the value of your solar-generated power increases, improving long-term savings and return on investment.
4. Battery storage integration
Battery storage maximises self-consumption by storing surplus solar energy instead of exporting it back to the grid at low rates. This means:
- Less electricity purchased during peak-rate periods
- Protection against future price spikes
- Greater resilience during power outages (depending on system setup)
Businesses with battery storage typically see 15–25% additional savings compared to solar-only systems.
A real-world example
Let’s consider a medium-sized UK business spending £40,000 per year on electricity.
- Installing a 75 kW solar PV system could reduce grid consumption by around 40%, saving £16,000 annually
- Adding battery storage could push savings to 60%, cutting electricity costs by £24,000 per year
That’s £240,000 saved over 10 years, excluding electricity price increases — and many systems last 25+ years.
Payback periods and long-term returns
Most commercial solar PV systems in the UK achieve payback in 3 to 6 years, depending on system size, energy usage, and whether battery storage is included. After payback, the electricity generated is essentially free, significantly lowering operating costs for decades.
Solar PV also improves cash flow predictability, helping businesses budget more effectively by reducing exposure to fluctuating energy prices.
Beyond savings: additional business benefits
While cost reduction is the main driver, solar PV and battery storage also deliver:
- Reduced carbon footprint, supporting net-zero and ESG goals
- Improved brand reputation with customers and stakeholders
- Increased property value and future-proofed buildings
- Potential income from exporting excess electricity or participating in flexibility markets
Is solar PV right for your business?
If your business owns or leases suitable roof space or land and has consistent electricity usage, a solar PV and battery storage system is likely to be a strong investment.
The key is a professionally designed system, tailored to your energy profile and maintained properly to ensure optimal performance year after year.
Take the next step
Every business is different — and so are the savings. A detailed site survey and energy analysis can show exactly how much your business could reduce its electricity bills by with solar PV and battery storage.
If you’re ready to take control of your energy costs, reduce your reliance on the grid, and invest in a cleaner, more resilient future, now is the perfect time to explore commercial solar solutions – book your FREE, no obligation, quotation TODAY!
