Why Summer Is the Best Time for Businesses to Invest in Battery Storage
As we move into summer 2026, businesses across the UK are preparing for rising electricity costs, growing pressure to improve financial stability and demonstrate sustainability to their customers. And, for companies with solar PV systems, the summer season also presents a major opportunity and ability to generate and store more renewable energy than at any other time of year.
Battery Energy Storage Systems (BESS) are rapidly becoming financially viable and an increasingly valuable investment for UK businesses.
Make the Most of Summer Solar Generation & BESS
During the summer months, solar PV systems generate significantly more electricity thanks to:
- Longer daylight hours
- Increased UV intensity
- More consistent generation conditions
For many businesses, this means excess energy is produced during the day that may not be fully used at the time it is generated.
Without battery storage, any unused electricity will be exported back to the grid, with a poor financial return. However, with battery storage, businesses can store excess solar energy and use it at another time. Thus, benefiting from buying expensive grid-supplied power. In addition, batteries can be programmed to take cheap nighttime electricity from the grid and use it in the morning before the sun rises.
Store Energy for When You Need It Most
Battery storage systems allow businesses to capture surplus solar energy during the day, take in low priced night time grid power, and use it later during peak operating hours.
This can help businesses:
- Lower electricity costs
- Improve energy efficiency
- Increase energy independence
Rather than purchasing expensive electricity during peak periods, businesses can use the renewable energy they have already generated and stored earlier in the day.
Maximise the Value of Solar PV
Adding battery storage helps businesses maximise the value of their solar PV investment by increasing solar self-consumption and reducing the export of renewable generation.
Instead of exporting excess electricity back to the grid, businesses can retain and use more of the energy they generate on-site — improving both efficiency and return on investment.
Support Sustainability Goals
Battery storage also supports wider sustainability initiatives by helping businesses rely more heavily on renewable energy and reduce dependence on fossil fuel-generated electricity.
By storing and using more clean energy on-site, organisations can lower carbon emissions and strengthen long-term sustainability strategies.
Why Businesses Are Investing Now
Summer provides the ideal conditions to begin benefiting from battery storage immediately. With solar generation at its highest, businesses can start storing more renewable energy straight away and improve overall energy efficiency during peak production months.
At Boston Renewables, we help businesses across the UK implement tailored renewable energy and battery energy storage solutions designed to reduce costs, improve efficiency, and support long-term sustainability goals.