Knowledge Base
In-depth articles about solar energy, photovoltaic technology, and how to get the most from your solar system.
Solar Yield by Region: Monthly Data for US, UK, Australia, India & More
Monthly solar yield data for major markets worldwide. kWh/kWp tables for USA, UK, Australia, India, Japan and Germany.
~18 min readCalculate Solar Yield: PVGIS vs. Weather Forecast vs. Monitoring
Calculate solar yield with PVGIS, weather forecast or monitoring. Method comparison by accuracy, timeframe and purpose.
~16 min readMonthly Solar Yield: Regional Overview for Germany 2026
Solar yield by month for North, Central and South Germany in kWh/kWp. PVGIS data, seasonal patterns and regional differences.
~16 min readSolar Irradiance in Germany: Map, Data and Regional Differences
Global irradiance in Germany by region and city: 950-1,220 kWh/m² per year. Top 20 cities, seasonal distribution and climate trends.
~16 min readWeather and Solar Yield: How Clouds, Temperature and Rain Affect PV Output
How weather impacts solar yield: cloud types, temperature coefficient, rain, snow and wind. All factors explained in detail.
~16 min readHistory of Photovoltaics: From Becquerel to the Terawatt Era
The history of solar cells from 1839 to today: milestones, efficiency records, price trends and the key figures of photovoltaics.
~16 min readInverter Guide: String, Hybrid and Micro-Inverters Compared
Inverters for solar systems: string vs. micro vs. hybrid inverters, sizing, MPP trackers and manufacturer comparison.
~20 min readSolar System Maintenance: Cleaning, Monitoring and Troubleshooting
PV system maintenance: cleaning guide, monitoring systems, identifying common defects, warranty tips and annual maintenance checklist.
~16 min readSolar Module Technologies: From Monocrystalline to Perovskite Tandem
Solar cell technologies compared: Mono, Poly, thin-film, PERC, TOPCon, HJT, Perovskite, Tandem -- structure, efficiency and future outlook.
~22 min readMounting Systems for Solar: Roof-Mount, In-Roof, Flat Roof, Facade and More
Solar module mounting compared: roof-mount, in-roof, flat roof, facade, carport and ground-mount -- costs, pros/cons and structural hints.
~18 min readSolar Energy on Earth: Solar Constant, Spectrum and Potential
How much solar energy reaches Earth? Solar constant, atmospheric losses, global distribution and the enormous potential of solar energy explained.
~14 min readPV vs. Power Plants: Land Use and CO₂ Compared
How much land does photovoltaics need compared to nuclear, coal and gas? Interactive comparison with lifecycle CO₂ and land efficiency.
~12 min readHow Does Photovoltaics Work?
Clear explanation of how solar cells and PV systems work -- from the photoelectric effect to feeding electricity into the grid.
~8 min readSolar Cell Efficiency Comparison 2026
Efficiency comparison of all solar cell types: monocrystalline (19-22%), polycrystalline (15-17%), thin-film and new technologies. With interactive tools.
~15 min readHow Does Photovoltaics Work?
How solar cells generate electricity: the photoelectric effect, semiconductor physics and the p-n junction explained. With interactive visualisations.
~12 min read