Jean-Marc Guillou, Business Unit Director of Energy Storage, Socomec
Rising electrification is reshaping the energy landscape for commercial and industrial (C&I) buildings, as geopolitical disruption continues to drive volatile energy prices and reinforce the shift towards more domestically produced, clean energy systems. This transition creates both cost‑saving opportunities and operational challenges: while onsite renewable generation can deliver lower‑cost electricity, its output does not always align with periods of highest demand. Against this backdrop, battery energy storage (BESS) offers C&I buildings a practical and forward‑looking way to manage costs more proactively and exercise greater control over their energy use.
Bridging the gap between production and consumption
Onsite renewables, such as solar, are an effective route to lowering long‑term energy costs. Research commissioned by the UK Warehousing Association (UKWA) shows that solar in industrial and commercial sectors has the potential to reduce annual electricity costs by 40-80 percent, with the country’s top largest warehouses capable of supporting around 15GW of rooftop solar capacity alone.
But onsite generation only delivers value when the electricity generated is utilised in ways that maximise operational and financial return. Renewable energy output rarely mirrors business demand, meaning sites often generate excess power during quieter periods while still facing high grid costs at peak times. For many C&I buildings, this mismatch limits the return on electrification and leaves sites exposed to volatile grid prices at the moments energy matters most.
Meeting today’s energy challenges requires the effective utilisation of onsite renewable output, which is where energy storage becomes essential. As the bridge between when power is generated and when it is needed, intelligent BESS functions as a financial asset for C&I buildings, increasingly adopted at scale across the UK to lower costs and strengthen resilience without added operational complexity.
BESS for cost efficiency and optimisation
BESS opens a variety of financial opportunities that go beyond reducing exposure to high energy prices. One of the immediate advantages lies in mitigating demand charges. When electricity is stored during off‑peak hours and used during periods of highest demand, businesses can reduce the peak demand charges that make up a significant share of their electricity bills. This peak shaving is enabled by continuous measurement of building consumption and battery state of charge, allowing energy to be released precisely when demand peaks occur. The same capability underpins tariff optimisation, allowing organisations to purchase electricity when prices are lowest and rely on stored energy when rates increase.
Storage also supports renewable self‑consumption, ensuring more onsite generation is used onsite rather than exported at comparatively low value. When building operators manage energy storage as part of the site’s electrical architecture, these cost optimisation strategies become repeatable operating modes rather than one-off interventions.
Unlocking new revenue streams
Alongside these savings, BESS introduces a range of revenue‑generating mechanisms that enhance its business value. By managing both active and reactive power across a wide operating range, BESS can provide grid‑support services such as frequency and voltage regulation. In capacity markets – which have expanded significantly in recent years – businesses are paid for making their stored energy available during periods of high demand, turning flexibility into a commercial advantage.
Energy trading provides a further opportunity to strengthen returns, with energy flows managed through an integrated control platform, while demand‑response programmes offer additional earnings by compensating businesses for reducing grid consumption. Collectively, these mechanisms show storage delivers value beyond storage, improving long‑term financial performance of C&I facilities.
The role of BESS in safeguarding business continuity
At a time when geopolitical shocks are pushing up gas prices that still feed directly into electricity costs in many markets, BESS does more than deliver financial value. As networks operate closer to their limits, price shocks are increasingly accompanied by constraints and instability, making on‑site resilience a practical requirement rather than a contingency.
BESS supports business continuity by providing backup energy during grid outages, reducing reliance on conventional gensets. Integrated into a site’s electrical architecture, storage can supply power during blackouts and strengthen overall resilience. Where configured with black‑start capability, BESS can also enable facilities to re‑energise key systems independently of the external grid – an increasingly important capability as network pressures intensify.
A strategic asset for C&I buildings
The opportunities unlocked by BESS give businesses an innovative way to manage costs, protect critical processes and invest in onsite renewables with greater confidence. In a more constrained and volatile energy landscape, BESS enables businesses to modernise their operations while maximising financial return – giving C&I buildings a competitive advantage today.
This article appeared in the May 2026 issue of Energy Manager magazine. Subscribe here.
