Guide to Photovoltaic Calculation

This calculator helps you plan and size your photovoltaic system based on current PVGis climate data.

About This Calculator

The Solar Calculator is based on the PVGis database (Photovoltaic Geographical Information System) of the European Commission and enables precise yield calculations for PV systems throughout Europe.

Main Functions

1. Yield Calculation

  • Location-specific solar data (PVGis)
  • Consideration of orientation and tilt
  • Monthly and annual yield forecasts
  • Shading analysis

2. Self-Consumption Optimization

  • Load profiles for different consumer types
  • Calculate self-consumption rate
  • Determine self-sufficiency level
  • Find optimal system size

3. Battery Sizing

  • Battery storage design
  • Economic calculation with storage
  • Optimization of storage capacity

4. Economic Analysis

  • Investment calculation according to VDI 2067
  • Payback period
  • Net present value and internal rate of return
  • Levelized cost of electricity

Input Parameters

Location

  • Address or GPS coordinates
  • Automatic PVGis data query

System Configuration

  • Module power (kWp)
  • Orientation (azimuth)
  • Tilt (degrees)
  • Efficiency

Consumption Profile

  • Annual electricity consumption
  • Load profile type (household, commercial, etc.)

Economic Parameters

  • Investment costs
  • Electricity price
  • Feed-in tariff
  • Operating costs

Understanding Results

The calculator provides:

  • Annual Yield (kWh/kWp): Specific yield per installed capacity
  • Self-Consumption (%): Share of self-used solar power
  • Self-Sufficiency (%): Share of electricity demand covered by PV
  • Payback Period (years): Time to economic viability

Standards and Norms

  • PVGis: European solar radiation database
  • VDI 2067: Economic efficiency of building services
  • DIN EN IEC 61724: Photovoltaic system monitoring

Frequently Asked Questions

Which data source is used?

The calculator uses PVGis 5.2 with current satellite data and climate models.

How accurate are the forecasts?

Deviation is typically ±5-10% compared to actual yields.

Can I calculate multiple orientations?

Currently one main orientation is supported. For complex systems, perform multiple calculations.

Further Information

For detailed technical information, consult:

  • PVGis Documentation
  • VDI 2067 Part 1: Economic efficiency
  • Local subsidy programs and feed-in tariffs

To Calculator: Start Photovoltaic Calculator