Battery Energy Storage Systems (BESS)
Battery Energy Storage Systems (BESS) help businesses reduce electricity costs, unlock flexible capacity, improve resilience and support electrification — deferring or reducing costly grid upgrades.
Energy infrastructure is becoming a business constraint.
For many commercial and industrial organisations, rising electricity costs, increasing operational demand, electrification of transport and heating, and growing pressure to decarbonize, are placing significant strain on existing energy infrastructure.
Grid constraints are becoming increasingly common, limiting expansion plans, delaying EV charging rollout, and increasing operational costs.
Traditional grid reinforcement is often expensive, slow, and outside of a business’s direct control.
Battery Energy Storage Systems (BESS) provide a more flexible alternative — helping businesses create additional usable capacity behind the meter while improving operational performance and energy resilience.
Get in touch
Simply fill out the form or give us a call today on 01202 804975
Store energy intelligently. Use it when it matters most.
Battery Energy Storage Systems store electricity onsite so it can be used when demand, pricing, or operational conditions make it most valuable.
This allows businesses to reduce peak electricity costs, increase onsite self-consumption from renewable generation, improve resilience, and better manage energy demand across their operations.
When integrated with intelligent controls and optimisation software, battery storage becomes an active energy asset — not simply a backup system.
Speak to our energy teamBattery storage is particularly valuable for organisations with:
- high or variable electricity demand
- constrained import capacity
- onsite solar PV
- planned EV charging infrastructure
- electrified heating systems
- critical operational loads, or
- exposure to time varying electricity pricing.
Zestec can assess site suitability using half-hourly consumption data, tariff structures, existing grid capacity, onsite generation profiles, and future electrification requirements.
Ket features & benefits
Reduce energy costs
Reduce exposure to peak tariffs, DUoS charges, and volatile electricity pricing through intelligent charging and discharge optimisation.
Unlock flexible capacity
Create additional usable electrical capacity behind the meter without immediate grid reinforcement or infrastructure upgrades.
Improve operational resilience
Protect critical operations and improve continuity during grid interruptions or power quality events.
Support electrification
Enable EV charging infrastructure, electrified heating, and future operational growth with smarter energy management.
Generate additional value
Participate in flexibility and balancing opportunities through intelligent energy optimisation and Virtual Power Plant integration.
Unlock greater value from onsite solar generation.
Battery storage significantly increases the value of onsite solar PV generation.
Battery storage is particularly valuable where onsite generation and electricity demand profiles do not naturally align.
Instead of exporting excess electricity at lower value, stored energy can be used later during periods of higher demand, higher electricity pricing, or reduced onsite generation.
Integrated Solar PV and BESS systems can:
- increase onsite self-consumption,
- reduce low-value electricity export,
- help manage export limitations,
- improve return on solar investment,
- and support wider site electrification.
Together, solar and storage create a more resilient, flexible and controllable local energy system.
Together, PV + BESS create a local energy system that works for your business, not the grid.
Intelligent optimisation for flexible energy infrastructure
Zestec’s approach combines battery storage, solar PV, EV charging and other flexible energy infrastructure with intelligent optimisation, operational management and access to energy flexibility opportunities.
Working alongside Octopus Energy Group businesses and other specialist partners, systems can respond dynamically to:
- site demand and operational requirements,
- electricity pricing and peak demand periods,
- grid constraints and available network capacity,
- and flexibility market opportunities.
This enables energy assets to be continuously managed and optimised to improve operational performance, create greater operational flexibility, and maximise long-term value from onsite infrastructure.
By integrating generation, storage, controls, funding and optimisation into a coordinated solution, businesses gain greater visibility, control and long-term value from their energy infrastructure.
Fully funded battery storage solutions
Zestec delivers Battery Energy Storage Systems through fully funded Power Purchase Agreement (PPA) structures, enabling businesses to access flexible energy infrastructure without upfront capital investment.
Under a long-term partnership model, Zestec funds, delivers, operates, and maintains the system while customers benefit from reduced energy costs, improved resilience and greater control over site energy usage.
Book an exploratory BESS discussionThis approach allows organisations to deploy battery storage as part of a broader energy infrastructure strategy without the complexity of asset ownership or significant capital expenditure.
Combined with solar PV, EV charging, and intelligent optimisation, fully funded BESS can support long-term decarbonisation, electrification, and operational growth objectives.
A long-term partner in energy transition.
Zestec develops, funds, delivers, and manages renewable energy infrastructure for commercial and industrial organisations across the UK.
Owned by funds managed by Octopus Energy Generation, we combine technical expertise, operational delivery capability, and long-term asset management to support customers throughout the full lifecycle of their energy infrastructure.
We recognise the increasing importance of responsible supply chains and long term sustainability performance within energy infrastructure projects. Zestec works with established manufacturing and delivery partners that align with relevant ESG, traceability, compliance, and operational standards to support responsible deployment across the asset lifecycle.
Our team brings experience across:
- Solar PV
- Battery energy storage
- EV charging infrastructure
- Flexible energy systems
- Energy optimisation and controls
- Long-term operational management
We work closely with our customers to develop practical, commercially focused solutions that support long-term operational and sustainability objectives.
How it works
Assess
We analyse site demand profiles, operational requirements, existing infrastructure, and future electrification plans.
Design
Our team develops a tailored solution integrating storage, controls, optimisation strategy, and funding structure.
Deliver
Zestec manages engineering, installation, commissioning, and integration with minimal disruption to ongoing operations.
Optimise
Systems are continuously monitored and optimised to maximise operational and commercial performance throughout the asset lifecycle.
Typical applications.
Battery Energy Storage Systems can support a wide range of commercial and industrial applications, including:
- Manufacturing facilities
- Logistics and warehousing
- Distribution centres
- Retail and commercial estates
- Multi-site property portfolios
- Healthcare environments
- Industrial parks and infrastructure sites
BESS is particularly valuable where businesses are experiencing increasing electricity demand, electrification requirements, or limitations in available grid capacity.
Designed for long-term operational performance.
All systems are designed and delivered in accordance with applicable industry standards, with ongoing monitoring, maintenance, and operational support provided throughout the asset lifecycle.
Zestec places strong emphasis on operational reliability, health and safety, system performance, and long-term asset management to ensure infrastructure continues to deliver value over time.
Explore the potential for your site.
Whether you are looking to reduce energy costs, support electrification, overcome grid constraints, or improve operational resilience, Zestec can help assess where battery storage may deliver value for your business.
Designed for long-term partnership, not short-term installation.