Independent, Engineer-led verification of your Solar, Battery or Heat Pump quote, before you commit thousands. No products sold, no commission — just the physics, the data and the right questions for your installer.
Sustainable warmth needs a holistic approach. We scrutinise every pillar of your home's Energy profile.
Optimisation for genuine ROI — we verify panel placement, shading, usable roof area and Battery-sizing calculations against your real usage.
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Heat-loss and flow-temperature analysis to ensure your system actually keeps you warm in winter.
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Fabric-first Engineering to stop heat loss before it starts — the foundation of efficiency.
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Sometimes the greenest Boiler is the one you already own — just optimised. We assess condensing efficiency and weather-compensation controls to cut bills without a full replacement.
Learn more →No site visit, no sales call. Send what you already have and get clear Engineering back.
Email your installer's Solar, Battery, Heat Pump, Insulation or Boiler quote — PDF, photo or forwarded email.
We check the specification, sizing, realistic savings and payback against independent data — no assumptions, no hype.
You receive a full traffic-light report: what's sound, what's questionable, and the exact questions to put back to your installer.
A simple daily routine for cutting everyday waste — five minutes, four standby checks, three settings, two loads and one sweep of the home. No new kit, no spend — just less waste, every day.
See the full 5:1 Rule →Independent, Engineer-led guidance to help UK Homeowners understand Solar, Batteries, Heat Pumps, Insulation and Boilers before speaking to installers — plus an optional £69 Engineer's Second Opinion on your quote.
No. It is a guidance service — not an installer, supplier, surveyor, finance adviser or quote-comparison company. We earn no commission from installers.
Send your Solar or Heat Pump quote and you receive a full Engineering sanity-check: specification, realistic savings, red flags and the questions to put to your installer. We never sell you a system.
From the optional £69 review service, and from honest, disclosed finder's fees when a reader chooses to use a trusted British company we recommend.
All of the UK. Because the Engineer's Second Opinion reviews your written quote and documents, we can help Homeowners anywhere in Britain — wherever your installer is based.
Within 48 hours, Monday to Friday. Once you send your Solar or Heat Pump quote, your full Engineering sanity-check comes back within two working days.
Yes. As well as Solar, we cover Batteries, Heat Pumps, Insulation and Boilers — and the controls that tighten the whole system up.
The £69 rate is a summer offer — normally £99 — and runs until 22 September.
Independent, fixed-fee Engineering
No hardware sales, no commission — just Engineering. Choose the help that fits where you are.
An independent check of the quote you already have, before you commit thousands.
What’s included:
Get ahead of the sales pitch with your own independent specification — so installers quote to your terms, not theirs.
How it works:
Both services are completely independent and fixed-fee. We never sell hardware and never take commission — you pay us, so we answer only to you.
Book a flat-fee review with an independent Engineer. No sales pitch, just physics and data — send your installer's quote and get your full traffic-light report within 48 hours (Mon–Fri).
Paid already? Attach your installer's quote below and your report is under way — 48-hour turnaround, Monday to Friday. Got a question first? Same form: ask away.