Guides: solar panel shading

Tree shade, partial shading, bypass diodes, east-west roofs, PVGIS: explained with real figures from PV-Schatten.

• Tree shade on solar panels: how much yield does it really cost?
  Neighbour's tree, spruce, broadleaf: worked example of how many kWh a tree costs by height, distance and direction, what tree growth adds, and when felling pays off.
• Bypass diodes, strings and optimisers: what partial shading really costs
  How bypass diodes work under partial shading, why one module slows the whole string, when power optimisers or micro-inverters pay off, with a per-module example.
• East-west roof for solar: yield compared with south
  How much an east-west roof yields compared with south, PVGIS values for Vienna, Graz, Linz, Salzburg, Innsbruck, Bregenz, Klagenfurt, and why east-west often wins on self-consumption.
• PVGIS guide: calculate yield and account for shading properly
  Step by step through PVGIS of the European Commission: location, tilt, azimuth, system loss, horizon file. What PVGIS can do, what it cannot, and how to get trees and houses in anyway.