GreenHub Copilot

Your free solar home simulator. Simulate every hour of a year on your own roof, with real satellite weather for your location, then follow the money for 25 years. Free, no sign-up, and it runs in your browser.

PVGIS weather data
8,760 hours per year
Battery, heat pump and EV
Free and open

Location

Find a place

Or pick a city

Latitude

Longitude

Roof and panels

System size

Roof faces

Roof pitch

Roof faces (up to 4)

Module model

Temp. coefficient (%/K)

Other losses (%)

Ground albedo

Inverter AC (kW)

Inverter efficiency (%)

Battery

Capacity

Power (kW)

Round trip (%)

Reserve (%)

Capacity fade (%/yr)

Battery may charge the car

Household

Electricity use per year (kWh)

Without heat pump and car; those are added below. About 1,500 kWh per person is typical.

Daily routine

Realistic appliance peaks (single home)

Or upload your own hourly profile

A CSV with 8,760 hourly values (kWh), e.g. from your smart meter. It is scaled to the yearly total above and stays on your device.

Heat pump I have or plan a heat pump

Heated area (m²)

Building

Space heat (kWh/yr)

Hot water (kWh/yr)

Flow temp. (°C)

Carnot quality

Heating limit (°C)

Heat hot water at midday on solar (SG-Ready)

Electric car I have or plan an electric car

Kilometres per year

Charging

kWh per 100 km

Wallbox (kW)

Days per week the car is home in daylight

Prices and costs

Electricity (ct/kWh)

Feed-in (ct/kWh)

Investment (EUR)

Price rise (%/yr)

Feed-in years

Feed-in after that (ct/kWh)

Time-of-use tariff

Peak ct/kWh

From (h)

To (h)

Feed-in limit

Limit (kW)

Running costs (%/yr)

Discount rate (%)

Lifetime (years)

Degradation (%/yr)

Inverter swap (year)

Swap cost (EUR)

Grid CO₂ (kg/kWh)

Shading and horizon Include hills and mountains (PVGIS terrain)

Drag the points to draw trees, buildings or hills that block your sun. The curves are the sun's path in June, March/September and December. Arrow keys work too.

Pays for itself in

–

Where your solar power goes

Each month's production, by what happened to it

Where your electricity comes from

Each month's consumption, including heat pump and car

A day up close

Production and consumption, hour by hour

Battery charge

Money over time

Cumulative cash position, starting with the investment

Every hour of the year

Solar output by day (across) and local time (down)

From sunlight to socket

Year-one energy chain and where it is lost

Compare scenarios

Save what you see, change something, save again. Up to four side by side.

How this is calculated

GreenHub Copilot gives an informed first estimate, not a binding plan or financial advice. Have an installer check your roof, grid connection and subsidies before you buy. Weather data: PVGIS © European Union. Place search: © OpenStreetMap contributors.

GreenHub Copilot

Results