Zestec designs, installs and fully manages solar PV, assessing rooftops, surrounding land and integrated carports before sizing a system to a business’s exact needs. The process runs through four stages: a consultation and proposal where Zestec assesses the site and analyses electricity usage and pricing data to forecast savings and carbon reduction, agreeing funding options, installation to stringent health and safety standards, and ongoing management, so businesses enjoy reduced electricity bills for the length of the agreement with no maintenance costs.

Rooftop solar is a solar PV system fitted to an existing roof, and Zestec can assess rooftops, surrounding land and integrated carports to determine what’s appropriate for a specific site. Suitability is confirmed through Zestec’s initial evaluation process, which follows a strict, CDM-regulated framework covering the full lifecycle from evaluation through to the ongoing performance of the installation.

Commercial solar PV, recognised as the cheapest source of electricity globally, gives businesses cheaper guaranteed renewable energy, protection against grid energy price fluctuations, and a significant reportable reduction in carbon footprint. It’s also hassle and maintenance-free once installed, supports net zero targets, and gives businesses a powerful way to demonstrate their ongoing sustainability commitments.

The installation timeframe depends on the size and complexity of each site, the process runs through a strict, CDM-regulated framework managed by a dedicated Programme Manager, from initial site evaluation and funding agreement through to installation and commissioning. Zestec’s focus throughout is on delivering projects on time and on budget, drawing on experts across development, design, installation, commissioning and maintenance disciplines.

Installing EV charging lets businesses access a grant towards upfront costs under the Government’s Workplace Charging Scheme, and can generate new revenue streams through charge fees and usage restrictions for different users. It also supports net zero targets and gives businesses a powerful way to demonstrate their ongoing commitment to the energy transition.

Zestec designs, funds and integrates the right level of EV charging infrastructure for a site, based on an understanding of how electric vehicles will affect the demand and availability of electricity on the premises, with energy demand then intelligently managed to enhance the user experience without compromising operations.

Zestec works with partners within the Octopus family to design, fund and integrate EV charging infrastructure, combining Zestec’s project delivery expertise with the wider Octopus ecosystem’s technology and energy management capability.

Zestec funds EV charging infrastructure directly, covering design, funding and integration, while businesses can also access a Government grant towards upfront costs through the Workplace Charging Scheme. This fully funded approach means businesses can add charging infrastructure without the capital outlay of buying and installing it themselves.

A Battery Energy Storage System stores electricity on site so it can be used when demand, pricing or operational conditions make it most valuable, helping businesses reduce electricity costs, unlock flexible capacity, improve resilience and support electrification while deferring or reducing costly grid upgrades. When integrated with intelligent controls and optimisation software, it becomes an active energy asset rather than simply a backup system.

Battery 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 assesses site suitability using half-hourly consumption data, tariff structures, existing grid capacity, onsite generation profiles and future electrification requirements.

Yes. Battery storage creates additional usable electrical capacity behind the meter without the need for immediate grid reinforcement or infrastructure upgrades, which is valuable as grid constraints increasingly limit expansion plans, delay EV charging rollout and increase operational costs. Traditional grid reinforcement is often expensive, slow and outside a business’s direct control, which is where BESS provides a more flexible alternative.

Battery storage significantly increases the value of onsite solar generation, particularly where onsite generation and electricity demand profiles don’t naturally align. Rather than exporting excess electricity at lower value, an integrated solar PV and BESS system stores it for later use during periods of higher demand or higher electricity pricing, increasing self-consumption, reducing low-value export, and improving the overall return on a solar investment.

A Power Purchase Agreement is an electricity supply agreement where Octopus Energy Generation funds the installation, operation and maintenance of a business’s renewable solution. In return, the business generates green energy on site and pays only for what it uses, at a significantly lower price than the grid. Zestec are owned by funds managed by Octopus Energy Generation.

The cost of electricity from a PPA tariff is calculated based on the cost of installation, ongoing maintenance and specialist insurance, and isn’t linked to the current energy market. This means the client benefits from significantly reduced electricity bills and carbon emissions, with no capital outlay or the responsibility of installing and managing the system themselves.

Once a fully financed option is agreed, Zestec undertakes site visits, grid connection applications, planning and any structural and access assessments, before developing a programme of works for installation to the highest standards of health and safety while minimising disruption. Zestec then provides ongoing maintenance and ensures the system is optimised throughout the life of the agreement.

Zestec are owned by funds managed by Octopus Energy Generation, the largest investor in solar power in Europe and a specialist renewable energy investment business managing more than £5 billion of assets. This backing is what allows Zestec to offer businesses a fully funded route to solar, battery storage and EV charging with no capital outlay.

Ageing building stock, rising energy costs and tightening insurer and EPC requirements are converging across the UK, and when addressed in isolation these pressures can slow investment, increase operational risk and limit a building’s ability to deploy on-site renewable energy. Zestec has partnered with Kingspan to combine roof refurbishment and on-site solar generation into a single coordinated solution, avoiding that problem from the outset.

Kingspan, a global leader in high-performance insulation and roofing systems, brings FM approved roof solutions designed for long-term durability, fire safety and compliance, providing a robust platform for integrated solar PV generation. Zestec and Kingspan manage the entire project lifecycle together, from feasibility and design through to installation, commissioning and long-term operations, which simplifies delivery, reduces interface risk and minimises disruption.

Yes. The Zestec and Kingspan model is delivered through a funded Power Purchase Agreement that aligns long-term energy generation with asset renewal, giving building owners access to clean, on-site electricity at predictable, below market rates while significantly reducing the upfront capital typically associated with roof and solar upgrades.

Integrating roof refurbishment and solar PV into a single solution avoids the inefficiencies and missed opportunities of running the two projects separately. The approach also meets stringent fire, safety and structural standards, supports EPC improvement, reduces long-term operational risk, and the system is managed and optimised to deliver performance throughout the life of the agreement.