Plan
Home energy simulator
Model future bills, export income and payback using your home, energy use, tariff and equipment.
Open simulatorIndependent UK home-energy planning
See what your home energy choices could really cost — and save.
Model future bills and export income using your real home, tariff and energy use. Compare solar, batteries, heat pumps and settings before spending thousands.
✓Free to start✓No installer sales pitch✓Transparent assumptions
Home report preview
3-bed detached · South West
Best annual outcome
£684 better off
−42% grid cost
Grid electricity
£742
per year
Export revenue
£286
per year
Self-powered
71%
of demand
Payback
9.4 yrs
illustrative
Recommended scenario
Solar + 10.2 kWh battery
Charge cheaply overnight, cover the evening peak and export remaining energy at your chosen time.
✓
Your home
Property, heating and occupancy shape the starting point.
✓
Your tariff
Standing charges and time windows feed the comparison.
✓
Your data
Upgrade from estimates to half-hourly readings when ready.
A complete home-energy toolkit
Plan, check and improve — all in one place
Start with the simulator, then use independent guidance, quote checking and real-world information to make a better decision.
Check
Quote analysis
Check what an installer has included, challenge assumptions and compare the proposal with your own model.
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Guides and calculators
Independent UK guidance on solar, batteries, heat pumps, EV charging, tariffs and efficiency.
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Installers and real homes
Find relevant installers, learn from completed projects and ask practical questions before you commit.
Explore directoryHow it works
Useful on day one. More accurate over time.
You do not need perfect data to start. Build an initial model, then improve it as you connect readings, add quotes or update equipment.
Start my modelBuild your home model
Tell us about the property, heating, energy use and equipment you already own.
Compare realistic scenarios
Test tariffs, solar sizes, battery settings, heat pumps and export strategies.
Improve it with real data
Add half-hourly readings, quotes and connected equipment as your plan develops.
Technology decisions
Explore the choices that have the biggest effect on your bills.
Understand the trade-offs, model them for your home and keep every assumption visible.
Independent by design
No installer controls the recommendation or the assumptions behind it.
Built around your home
Replace broad averages with your tariff, equipment and half-hourly readings.
Free home model
Start with your home, not a national average.
It takes a few minutes, saves as you go and gives you a report you can keep improving.