Solar Advisor — is PV worth it for your home?

Your home

Country

Nearest town or city

Used to pick the closest point in our European sunlight map.

Which way does the roof face?

Roof steepness

How big a system?

I know my roof area I know the system size (kWp)

Usable roof area (m²)

Roughly the sunny part of the roof, ignoring chimneys and shading.

Electricity used per year (kWh)

It is on your annual bill. A typical European home uses 3 000–5 000 kWh.

Costs & tariffs

Defaults are typical values. Change any you know — your own bill is always better than our guess.

Currency

What you pay for electricity (per kWh)

What you are paid for exports (per kWh)

The gap between these two drives the whole battery question.

Solar system cost (per kWp, installed)

Battery cost (per kWh)

Battery size to test (kWh)

Set to 0 to skip the battery. We always show you both cases.

Financial assumptions

Discount rate (%)

System lifetime (years)

Battery lifetime (years)

Battery round-trip efficiency

Performance ratio

Yearly electricity price rise (%)

Extras

Planning a heat pump, an electric car or air conditioning? Each one changes how much of your own solar you can use. Turn on any that apply — or none, and go straight to your results.

Heat pump — heating your home with electricity

Uses the most electricity in winter, when there is least sun. Usually the toughest case for solar.

Heat pump details

Estimate from my home I know my heat demand

Heated floor area (m²)

Building age / insulation

Heat distribution

Electric car — charging at home

Adds a lot of demand. Whether it helps your solar depends entirely on when you charge.

Electric car details

Kilometres driven per year

Consumption (kWh per 100 km)

When do you charge?

Daytime charging only helps if the car is actually parked at home on weekdays. For most commuters it is not.

Air conditioning — cooling in summer

Runs on hot, sunny afternoons — the one addition that usually fits solar well.

Air conditioning details

Cooled floor area (m²)

Efficiency (SEER)

Your results

Show my results with

Heat pump Electric car Air conditioning

Where your electricity came from, month by month

Each bar is that month's total use. Watch the winter months: the roof gives least exactly when the house wants most.

Where your solar output went

Every kilowatt-hour the panels made, over a year.

Money over the system's life

The running total, starting at what you paid. It crosses zero at payback.

A typical July day

Averaged across the month — a real day is spikier.

A typical January day

The same house, the same roof, five months later.

Not sure this is the right system?

Put two versions of it next to each other — with and without a battery, more or fewer panels, a heat pump or not. Your house and your tariffs carry over.

What this estimate assumes

Is solar worth it for your home?

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Your home

Costs & tariffs

Extras

Your results

Where your electricity came from, month by month

Where your solar output went

Money over the system's life

A typical July day

A typical January day

Not sure this is the right system?