Make smarter
energy decisions
Explore free calculators, practical grant checks, and straightforward guidance to compare heating, solar, insulation, and efficiency upgrades with more confidence.
Typical solar outcome
£2,450/year
Estimated bill and export savings for a well-oriented UK roof
Clear next step
Compare grants, heating, and solar in one place
Start with a calculator, then move into focused topic guidance when you are ready to plan the full project.
Featured Tools
Start with our most useful calculators
Use the most popular tools first, then dig into guides and topic hubs for deeper planning.
Heating Cost Calculator
Estimate running costs for direct electric heating using UK tariff assumptions.
Solar Savings Calculator
Model solar generation, bill savings, export income, and simple payback.
Grant Checker
Check likely eligibility for national home energy grants and support schemes.
Insulation Savings
Compare likely bill savings from loft, cavity, and floor insulation upgrades.
Energy Bill Breakdown
Understand where energy costs go and spot the biggest saving opportunities.
Carbon Footprint
Estimate household emissions from heating, electricity, and retrofit decisions.
Browse by topic
Find the right section for your project
Move from quick calculators to broader guidance with clean, topic-led hubs covering the most important retrofit decisions.
Topic hub
Heating
Heat pumps, radiators, boilers, and efficient electric heating guidance.
Browse section →Topic hub
Renewables
Solar PV, batteries, inverters, and low-carbon generation options.
Browse section →Topic hub
Grants
Funding routes, eligibility checks, and official application pathways.
Browse section →Topic hub
Energy Saving
Practical efficiency upgrades to reduce bills and improve comfort.
Browse section →Topic hub
Building Fabric
Insulation, windows, airtightness, and thermal performance guidance.
Browse section →Topic hub
Commercial
Tools and frameworks for business energy performance planning.
Browse section →