Make smarter energy decisions
Explore free calculators, practical grant checks, and straightforward guidance to compare heating, solar, insulation, and efficiency upgrades with more confidence.
29
Free Tools
42
Expert Guides
6
Grant Schemes
Featured preview
Solar calculator snapshot
Annual generation
3,600 kWh
Simple payback
6.8 years
Built to help you compare options clearly before speaking to suppliers.
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.
Open calculator →Solar Savings Calculator
Model solar generation, bill savings, export income, and simple payback.
Open calculator →Grant Checker
Check likely eligibility for national home energy grants and support schemes.
Open calculator →Insulation Savings
Compare likely bill savings from loft, cavity, and floor insulation upgrades.
Open calculator →Energy Bill Breakdown
Understand where energy costs go and spot the biggest saving opportunities.
Open calculator →Carbon Footprint
Estimate household emissions from heating, electricity, and retrofit decisions.
Open calculator →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.
Heating
Heat pumps, radiators, boilers, and efficient electric heating guidance.
Browse section →Renewables
Solar PV, batteries, inverters, and low-carbon generation options.
Browse section →Grants
Funding routes, eligibility checks, and official application pathways.
Browse section →Energy Saving
Practical efficiency upgrades to reduce bills and improve comfort.
Browse section →Building Fabric
Insulation, windows, airtightness, and thermal performance guidance.
Browse section →Commercial
Tools and frameworks for business energy performance planning.
Browse section →