Kestrel Energy Systems

Services

Three ways to cut the bill. No shutdown.

Each can run on its own or as a combined programme. Every quote starts with a site assessment, so timelines and payback below are a planning guide, your proposal is site-specific.

Cut grid draw during your highest-cost hours

Rooftop solar

A roof-mounted photovoltaic array, sized against your actual roof survey and your site's daytime demand profile, not a generic per-square-foot rule of thumb. Structural survey, weight loading and existing roof warranty are checked before anything is designed, because a scheme that voids your roof warranty isn't a saving.

Typical timeline

10-14 weeks

Most of it structural sign-off and DNO grid application, not roof time.

Typical payback

4-7 years

Depends on roof orientation, site type and current tariff.

What changes for you

  • A meaningful share of daytime grid import is replaced by on-site generation, immediately visible on your next few electricity bills.
  • Facilities gets a live generation and consumption dashboard, the same data your sustainability report needs.
  • Any surplus is exported at an agreed rate rather than wasted, though we size to your load first, because export pays a fraction of what self-consumption saves.

Lower lighting spend from week one

LED retrofit

A fitting-for-fitting replacement of high-bay, low-bay and external lighting with LED equivalents, matched to your existing lux requirements and any task-lighting or safety-compliance minimums already in place on the floor.

Typical timeline

2-4 weeks

Scheduled off-shift or zoned so a working floor never stops.

Typical payback

18-30 months

The fastest payback of the three.

What changes for you

  • Lighting-related electricity spend drops immediately, usually the single fastest-paying line item in a retrofit programme.
  • Maintenance callouts fall, LED fittings run for years longer than the metal-halide or fluorescent stock they replace.
  • Lux levels and safety compliance are verified after install, not assumed.

Turn energy data into a reportable, defensible number

Building energy management

Sub-metering and a building energy management system layered over your existing HVAC, lighting and process loads, giving scheduling, setpoint control and alerting without replacing your existing plant.

Typical timeline

6-10 weeks

Metering install first, then commissioning and tuning before handover.

Typical payback

Under 1 to 9 years

Driven almost entirely by floor area: the fixed base cost of metering and controls is spread thin on a large site and dominates on a small one.

What changes for you

  • HVAC and lighting run on a schedule that matches actual occupancy and production shifts, not a fixed timer set five years ago.
  • Facilities gets alerts on anomalous consumption before it shows up as a large invoice.
  • Energy reporting for SECR, ESOS or a customer's supply-chain questionnaire is pulled from metered data, not estimated.

How it runs

Survey to handover, four steps

  1. 01

    Site assessment

    An engineer reviews your roof, your electrical intake and your last 12 months of consumption. No obligation, no generic quote.

  2. 02

    Design and proposal

    A site-specific design with sizing, projected savings, payback and a fixed price. You see the numbers before you commit to anything.

  3. 03

    Install

    Scheduled around your operating hours and shift patterns. A named site manager, daily briefings, and a plan for any isolation that's needed.

  4. 04

    Handover and monitoring

    Commissioning, as-built documentation, and a live dashboard handed to your facilities team, plus a maintenance plan if you want one.

Questions

What people ask before they sign

No, in almost all cases. Roof and lighting work happens above and around a running floor. The one exception is the electrical tie-in for solar, which typically needs a short isolation window, agreed with your team weeks ahead, not sprung on the day.

That's exactly what the structural survey in your site assessment checks, before any design work happens. If your roof can't take a full array, you get a smaller scheme sized to what it can safely carry, or a recommendation against solar with LED and BEMS handled on their own.

We check your existing roof warranty terms and installer accreditation before design starts. Mounting is specified to keep your existing warranty intact, and where a roofing manufacturer requires their own approved installer for penetrations, we coordinate directly with them.

Your proposal is built from your actual last 12 months of consumption data and a physical roof survey, not a generic per-square-foot rule. The assumptions behind every number are shown to you, and you can ask us to walk through any of them before you sign anything.

Yes. Metered generation and consumption data from the building energy management system feeds directly into SECR, ESOS or customer supply-chain reporting, giving you an auditable figure instead of an estimate.

Common, and it's covered in the site assessment. We work around what's already in place, extending or integrating with an existing system where it makes sense, rather than ripping out working equipment.

Want the numbers for your own roof and spend first?

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