# Erebus Solar — On-site solar shade capture > Solar shade capture and analysis tool for PV system design professionals. (iPhone/iPad app by Todd Evans.) - Source: https://appshunter.io/ios/app/erebus-solar/id6790828521 (this page in markdown: same URL + `.md`) - Developer: [Todd Evans](https://appshunter.io/developer/6790828523) - Category: Productivity, Utilities - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 19 MB - Languages: American English - Released: 2026-09-19 - Data updated: 2026-09-28 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/erebus-solar/id6790828521/reviews.md ## What is Erebus Solar? Measure shade on site with the hardware already in your pocket. Erebus Solar was designed by an electrical engineer and an architect with years of experience designing solar systems around the world. We were fed up with the horizon-finding hardware the industry still relies on: dedicated devices that haven't been meaningfully updated in decades, are slow to use and slow to find a GPS fix, and analog tools that need paper, a pencil and a latitude template that may not exist for your site. Erebus Solar is our answer. Your iPhone already has the camera, compass and sensors the job needs. WHY HORIZON FILES MATTER Far-field shading from trees, terrain and neighbouring buildings is one of the largest sources of error in a PV production estimate. A measured horizon profile, captured on site, lets your design software model that shading instead of guessing. Erebus Solar produces horizon files that leading PV design tools such as HelioScope and PVsyst read directly, and PV*SOL accepts the same convention. CAPTURE • AR sun path: today's arc, the solstice and equinox arcs and the live sun drawn over the real sky • Tap the real sun to calibrate the compass to true north • Automatic sky capture: sweep the envelope band and frames capture themselves, no buttons • Sky Editor: review the stitched sky and trace obstructions by hand, so the report reflects what you saw ANALYSE • Annual solar access and TSRF for each array area • Month-by-month charts and the sun-path chart with your obstructions • Aerial view with each area's boundary and the solar envelope over satellite imagery EXPORT • PDF shade report with your company name and logo • Horizon files for HelioScope, PVsyst and PV*SOL, generated from the same capture • Share straight from the phone ORGANISE • One project per site, located by address or GPS, with status from Created to Completed • Areas for each roof face or ground section • Everything stored on your iPhone: no account, no upload Erebus Solar's outputs are a design aid for qualified professionals. Results depend on the phone's sensors, compass calibration and sky conditions; check them against your own observations and your design tool's simulation before relying on them. Privacy Policy: https://erebussolar.app/privacy Terms of Use: https://erebussolar.app/terms ## Key features - AR sun path visualization - Automatic sky capture - Sky Editor for obstruction tracing - Annual solar access analysis - PDF shade report export - Horizon file generation for design tools - Project organization by site ## Frequently asked questions about Erebus Solar ### What is Erebus Solar? Erebus Solar is a mobile application designed to help solar professionals measure on-site shade. It utilizes the phone's camera, compass, and sensors to capture the sky's envelope and generate horizon files for PV design software. ### What design software is compatible with Erebus Solar's horizon files? Erebus Solar generates horizon files that are directly read by leading PV design tools such as HelioScope and PVsyst. The same convention is also accepted by PV*SOL. ### How does Erebus Solar help with accurate solar production estimates? By accurately measuring far-field shading from obstructions like trees and buildings, Erebus Solar allows design software to model shading effects. This reduces estimation errors compared to guessing or relying on outdated methods. ### Does Erebus Solar require an account or internet connection? No, Erebus Solar stores all project data directly on your iPhone. It does not require an account or an upload, ensuring privacy and offline usability. ### What are the key analysis features of Erebus Solar? Erebus Solar provides annual solar access and TSRF for each array area, month-by-month charts, and a sun-path chart with your specific obstructions. It also offers an aerial view with solar envelopes over satellite imagery. ### How frequently is Erebus Solar updated? Erebus Solar was last updated on September 19, 2026, with version 1.0. This indicates it is a new release, and future updates will likely depend on user feedback and development plans. ### What is the age rating for Erebus Solar? Erebus Solar has an age rating of 4+. This means it is suitable for users aged 4 and above, with no significant mature content. ### Does Erebus Solar have ads? No, Erebus Solar is ad-free. The application does not contain advertisements, providing an uninterrupted user experience. ## Version history (last 1 release) ### 1.0 — 2026-09-19 No release notes. ## Apps similar to Erebus Solar | App | Rating | Price | Category | | --- | --- | --- | --- | | [Solar APP: PV Solar Calculator](https://appshunter.io/ios/app/solar-app-pv-solar-calculator/id6451967917) | 4.4 (23) | Free | Productivity | | [AI Transcribe - Meeting Notes](https://appshunter.io/ios/app/ai-transcribe-meeting-notes/id6449003263) | 4.2 (172) | Free | Productivity | | [AI Language Translator +](https://appshunter.io/ios/app/ai-language-translator-plus/id6748346123) | 4.5 (333) | Free | Productivity | | [Penned: Private Notes](https://appshunter.io/ios/app/penned-private-notes/id1480653765) | 4.6 (87) | $4.99 | Productivity | | [TranscribeAI: Note Taker](https://appshunter.io/ios/app/transcribeai-note-taker/id6739488479) | 3.7 (58) | Free | Productivity | | [Color Muse](https://appshunter.io/ios/app/color-muse/id995252259) | 4.8 (1,476) | Free | Productivity | ## Related topics [erebus solar](https://appshunter.io/ios/topics/erebus-solar) · [erebus](https://appshunter.io/ios/topics/erebus) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-28.*