How much solar fits on your roof?
Type your address, trace your roof on the satellite map, and get a realistic estimate of panels, system size, yearly output, savings and payback — in under a minute.
Got land, not just a roof?
See if wind + ground-mount solar + a battery can make your property energy-independent.
From address to solar plan in three steps
1 · Find your roof
Type your address and we drop you onto high-resolution satellite imagery of your building.
2 · Trace the roof
Click around each roof plane you'd cover. We measure the real area and adjust for pitch and orientation.
3 · See the numbers
We pull location-specific sun data and show system size, output, savings, payback and a battery verdict.
Why Energyhelper24 beats a generic calculator
Your actual roof, not an average
You trace your own roof on satellite imagery, so the area is real — not a guess from your floor size.
Local sun, not a national number
Yearly output comes from the EU's PVGIS irradiance model at your exact coordinates, tilt and orientation.
An honest battery answer
Most tools upsell a battery. We tell you plainly whether it pays back — worth it, marginal, or not yet.
No login, no sales call to see numbers
The full estimate is free and instant. Share your details only if you actually want installer quotes.
Solar by city
Solar roof planner — questions
How accurate is the roof area?
You trace the outline yourself on satellite imagery, so the flat footprint is measured precisely. We then multiply by your chosen pitch to get the true sloped surface and keep ~70% of it as usable (allowing for edge setbacks, vents and chimneys). It's a solid planning estimate; a surveyor confirms the final layout.
Where does the sun/output data come from?
Yearly output is modelled by PVGIS, the European Commission's photovoltaic geographical information system, using satellite-derived irradiance for your exact latitude and longitude, roof tilt and orientation, minus standard system losses.
Are the cost and savings figures reliable?
They're realistic order-of-magnitude estimates based on current typical installed prices, electricity prices and export tariffs for your country. Real quotes vary with your roof, hardware and installer — treat these as a starting point, not a quote.
Does solar still work on an east- or west-facing roof?
Yes. South is best, but east/west roofs typically deliver around 80–85% of a south roof and spread output across morning and evening, which can actually raise self-consumption. The tool adjusts output for whichever direction you pick.
Is it really free and private?
The estimate is completely free with no account. Your address is used only to show the map and compute your result. You choose whether to share contact details for installer quotes.