Observed arrival · 2026-09-16

Erebus Solar Turns an iPhone into a Solar-Shading Instrument

erebussolar.app Observed source

Editorial interest 84/100 Selection signal · not a rating of the site

An iPhone tool captures roof horizons, models annual sun paths, and exports shade data for PVsyst, HelioScope, and PV*SOL.

Landing page captured for the 2026-09-16 issue.

Field notes

The workflow begins with a project location and separate roof or ground-mount areas drawn over aerial imagery. During capture, the user calibrates the compass by tapping the real sun, sweeps the visible sky, and can trace trees, chimneys, and neighboring buildings afterward. The resulting annual solar-access and TSRF report can carry a company name and logo, while the same capture produces PVsyst and PV*SOL horizon files plus a HelioScope CSV.

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