☀️ Rooftop Solar Yield, Sun Path and Payback Lab — 2D Sun Path, Roof Section and Payback Charts

2D companion of the rooftop-solar lab: polar sun-path chart with the tree obstruction, roof section with the incidence angle, daily power, monthly yield and self-consumption, tilt sweep and 25-year payback, using the same solar and economics module as the 3D page.