About SolarByPostcode
Our mission
We help UK households decide whether solar panels (with or without battery storage) make financial and environmental sense for their home—without sales pressure, hidden agendas, or confusing jargon.
Our job is to help you answer the question: "Should I even do this?"
The problem we're solving
Solar can feel complex. It’s easy to get quotes before you fully understand the basics, and that can make decisions harder than they need to be.
We believe you deserve clear, honest numbers before sharing your contact details.
Who we are
SolarByPostcode is an independent, reader-supported project run by energy-data enthusiasts based in Copenhagen. We are not tied to any manufacturer, installer, or energy company.
We built this site because clear, trustworthy information is hard to find. Solar can be brilliant—but it depends on your location, your roof, your energy use, and your local electricity rates. Generic advice can miss the mark.
How the site is built
We use official, public data sources:
- ONS Postcode Directory (ONSPD) — UK postcodes, verified locations, regional boundaries
- PVGIS (EU Joint Research Centre) — Solar irradiance and expected energy yield by location
- Ofgem Price Cap — Current electricity unit rates and standing charges by region
- GOV.UK / MCS statistics — Real-world installation cost bands from certified installers
- Energy Performance Certificate (EPC) Open Data — Local housing context (aggregated; never address-level)
Every figure on the site is a modelled estimate derived from these sources using transparent formulas. We publish the key assumptions in our Data Sources / Methodology page.
How we earn money
If you request quotes via our site, we may receive a referral fee from a vetted installer. This fee comes at no extra cost to you—it is paid by the installer, not added to your quote.
Important: Our data and calculations are independent. We aim for conservative, transparent numbers and show both savings and costs. See our Terms of Use and Privacy Policy.
What makes us different
1) Honest about limitations
We'll say when solar probably isn't worth it. Batteries add convenience but often extend payback—we explain the trade-offs.
2) Local, real data
Your postcode uses your region's electricity prices, local sunshine, and typical housing mix—not national averages.
3) No forms, no pressure
Get the essentials without sharing your email or phone number. Only when you're ready do we connect you to installers.
4) Clear assumptions
Each calculator shows its working: system costs, consumption, export rates, losses, and lifespan. Learn more in Data Sources / Methodology.
Accuracy and feedback
We aim for complete accuracy, but solar economics vary by property, roof condition, energy usage, and personal circumstances. Our numbers are informed estimates, not guarantees.
Found an error, or something unclear? Contact us and we'll respond within two UK business days.