Solar Simulator

Estimate the profitability and self-consumption of your photovoltaic installation

● Unified Solar Simulator

Complete hourly simulation (8,760h/year) via the PVGIS API. Enter your roof details, consumption and financial parameters to get a detailed profitability analysis with self-consumption curves.

● Location

📍 France (FR)

📍 Click on the map to position your installation. The country will be detected automatically.

Latitude

Longitude

● Photovoltaic System

Orientation

Tilt (°)

Shading (%)

0% = full sun

Roof surface (m²)

ℹ️ Available area for panels. A standard panel is ~1.7 m². Allow ~6 m²/kWp installed.

Panel type

Monocrystalline PERC

Most widely deployed technology. Rear-side treatment (Passivated Emitter Rear Cell) improves light capture. Excellent value for money.

⚡ Efficiency: 19–21% 💰 Price: $0.25–0.35/Wp

PV power (kWp)

ℹ️ Auto-calculated: area × 0.85 × efficiency. Override if you know the exact capacity from your quote.

⚠️ Location-independent — peak power (kWp) is a fixed property of your panels. What changes with location is the yield (kWh/kWp/year), shown in results after simulation.

System losses (%)

ℹ️ Cabling, inverter, dust, temperature losses. 14% is a standard value.

Mounting type

ℹ️ Roof-mounted: natural ventilation, better yield. Building-integrated: eligible for higher feed-in tariff.

● Electricity Consumption

Annual consumption (kWh)

ℹ️ Check your annual bill. UK average: ~3,700 kWh/year for a household.

Consumption profile

ℹ️ Determines the hourly distribution of your consumption (day/night, summer/winter). Direct impact on self-consumption rate.

Additional equipment

🚗 Electric vehicle (+2,500 kWh/year) 🌡️ Heat pump (+4,000 kWh/year) 💧 Solar hot water (+1,500 kWh/year)

ℹ️ These increase consumption but also self-consumption (especially if scheduled during daytime). The simulation adapts the hourly profile accordingly.

● Battery Storage

Add a battery

● Financial Parameters

Electricity price (€/kWh)

⚡ Pre-filled: average retail price incl. taxes (source: Eurostat 2025)

Indicative value — check your electricity bill or provider's website.

Surplus feed-in tariff (€/kWh)

⚡ EDF OA surplus self-consumption rate (≤9 kWp, Q1 2026). Guaranteed 20 years, revised quarterly.

Indicative value — check on edf-oa.fr

Installation cost (€)

⚡ Country average: — €/kWp (panels + inverter + installation)

If empty, this country average is used. Indicative value — enter your actual quote if available.

Subsidies (€)

Degradation (%/year)

Price increase (%/year)

Discount rate (%)

Annual production

—

kWh

Total energy produced by your panels in 1 year, calculated hour-by-hour using PVGIS irradiation data for your location.

Production per kWp

—

kWh/kWp

Installation yield: kWh produced per kWp installed. Allows comparing efficiency between sites (800–1,800 depending on location).

Installed capacity

—

kWp

Peak power of your system = surface area × fill factor (85%) × panel efficiency for the selected panel type.

Self-consumption savings

—

€

Money saved by consuming your solar production directly instead of buying from the grid (self-consumed kWh × electricity price).

Feed-in revenue

—

€

Revenue from selling surplus electricity to the grid (excess kWh × feed-in tariff for your country).

Annual savings

—

€

Total yearly benefit = self-consumption savings + feed-in revenue. This is the real financial gain from your system each year.

Installation cost

—

€

Total gross cost: panels + inverter + installation + grid connection (+ battery if enabled). Based on country average or your custom value.

Net cost after subsidies

—

€

Actual cost after deducting your country's subsidies and incentives (self-consumption bonus, tax credits, etc.).

Payback

—

years

Years until cumulative savings cover the net cost. After this point, your system generates pure profit.

NPV 25 years

—

€

Net Present Value: total savings over 25 years minus initial net cost, factoring in annual electricity price increases.

IRR

—

Internal Rate of Return: equivalent annual return on your investment. Compare with bank savings (~3%) to assess profitability.

CO₂ avoided

—

kg/year

CO₂ emissions avoided thanks to your solar production, based on the emission factor of your country's electricity mix.

Payback (25 years)

Annual energy flow

Self-consumption rate

—

Self-production rate

—

Direct self-cons.

—

kWh

Via battery

—

kWh

Grid injection

—

kWh

Grid draw

—

kWh

Monthly profile

Month	Production (kWh)	Consumption (kWh)	Self-cons. (%)	Injection (kWh)

Solar Simulator

● Unified Solar Simulator

● Location

● Photovoltaic System

● Electricity Consumption

● Battery Storage

● Financial Parameters

Payback (25 years)

Annual energy flow

Monthly profile

Monthly profile

Energy distribution

Typical summer day (June-July)

Typical winter day (Dec-Jan)

Battery comparison

Subsidies and incentives

System summary

📄 Solar Analysis Report