PV planning
for residential and commercial properties
PV-Energie-Planer is an independent online tool that makes planning and profitability calculation of PV systems simple and transparent for homeowners, businesses, and installers.
Our Mission
PV-Energie-Planer brings homeowners, businesses, and solar installers together on one platform. Our simulations are based on real DWD weather data and enable well-founded, independent planning of PV systems — from initial sizing to profitability calculation.
What sets PV-Energie-Planer apart
Hourly simulation
Yield calculation for all 8,760 hours per year with realistic seasonal profiles, daily curves, and load profiles instead of simple flat rates.
3D roof planner
Place modules directly on your virtual roof. Supports gable, shed, hipped, and flat roofs with individual skylights, chimneys, and dormers.
DWD weather data
When entering a postal code, real 10-minute measurement data from the German Weather Service (2016–2019) from the nearest weather station is used – for location-accurate results.
Battery storage simulation
Realistic storage simulation with charge/discharge losses (93%), self-discharge, and battery degradation. Compare with and without storage at a glance.
25-year profitability
Complete cash flow calculation with electricity price increases, module degradation, financing, break-even analysis, and return calculation over 25 years.
PDF export
Export your complete PV analysis as a professional PDF document – ideal for consultations, bank meetings, or your own documentation.
Technology in detail
PV-Energie-Planer goes far beyond simple kWp-based estimates. The core calculation simulates every single hour of a year and considers:
- Global radiation by location – Location-specific full-load hours, real DWD measurement data when entering postal code (10-minute intervals, data 2016–2019)
- Roof pitch and orientation – Yield matrix for all 8 cardinal directions and tilt angles from 0° to 90°, optimized for latitude ~52° (Germany)
- Performance Ratio (82%) – Realistic system losses from inverters, cables, temperature, and soiling
- Consumption profiles – Various load profiles (standard, home office, family, shift work) for realistic self-consumption calculation
- Battery storage – Charge/discharge efficiency (93%), self-discharge (2.5%/month), usable capacity (95%), 1C charge rate
- Degradation – Annual module performance reduction (standard: 0.5%/year) over the entire analysis period
- Profitability – Electricity price increases, feed-in tariff (differentiated under/over 10 MWh), financing costs, operating costs
More tools
In addition to the PV calculator, the platform offers more useful tools:
- EV comparison calculator Coming soon – Compare total costs of electric car and combustion engine considering your PV electricity
- Heat pump calculator Coming soon – Calculate electricity consumption and profitability of a heat pump in combination with your PV system
- 3D roof planner – Visualize your module layout on a 3D roof model with sun path and shading
Privacy & Security
Your data belongs to you. We only store information necessary for operation and do not share personal data with third parties. All payments are processed securely via the certified payment provider Mollie. The entire application is hosted on servers in Germany.
Frequently asked questions
What is PV-Energie-Planer?
PV-Energie-Planer is an online tool for professional planning of PV systems. It calculates yield, self-consumption, autonomy, and profitability of your solar system over 25 years – including battery storage simulation and 3D roof planner.
How accurate is the yield calculation?
The calculation is based on an hourly simulation over 8,760 hours per year. When entering a postal code, real 10-minute measurement data from the German Weather Service (DWD) from 2016–2019 is used. Accuracy is typically over 95% compared to actual yields.
What does PV-Energie-Planer cost?
The free demo includes module configuration, yield calculation, consumption analysis, and feed-in tariff for full feed-in.
Extended features – such as partial feed-in considering self-consumption (incl. storage calculation), detailed monthly analysis of yield and consumption, inclusion of financing costs, and comprehensive profitability calculation – are included in the full version.
Privat: 7,99 € one-time – no subscription, no recurring fees.
Gewerbe: 14,99 € one-time – no subscription, no recurring fees.
Installers: monatlich 49,99 € oder jährlich 499,00 €.
Which roof orientations are supported?
PV-Energie-Planer supports all 8 cardinal directions (North, Northeast, East, Southeast, South, Southwest, West, Northwest) with individual tilt angles from 0° to 90°. Multiple roof surfaces can be combined.
Is battery storage considered?
Yes, PV-Energie-Planer simulates battery storage with realistic charge and discharge losses, battery degradation over lifetime, and calculates profitability with and without storage in direct comparison.
Can I export my analysis as PDF?
Yes, the complete PV analysis can be exported as a professional PDF document. The PDF contains all calculated values, charts, cash flow overview, and yield forecast over 25 years.
Plan your PV system now
Try PV-Energie-Planer for free and without obligation – full functionality, no credit card required.