Opti Solar: Panel Angle

Opti Solar helps you get the most out of your solar panels — whether you are planning a new installation or adjusting panels you already have.

Rooftop, ground mount, carport, balcony, garden, RV, van, boat, portable camping panels, off-grid cabin, or remote sites where power or mobile signal can be unreliable — Opti Solar works wherever you install solar.

🎯 PRECISION MEASUREMENT

Place your phone on your panel: instant tilt angle and true azimuth. The smart compass detects magnetic interference. Lock your reference measurement with one tap — use measured values instead of guessing.

🌑 SHADOW HUNTER — SHADING ANALYSIS (Premium)

Measure nearby obstacles (trees, chimneys, buildings) and see when they cast shadows on your panels across the year. Useful before buying panels, to avoid a shaded spot that kills winter production.

☀️ SUN PATH AR

Point your phone at the sky and see the sun path in augmented reality. Compare today against summer and winter solstices. Take a photo with GPS, date and measured angles for your records.

📊 SOLAR SCORE (0–100)

Tilt, orientation, shading, output — every criterion analyzed with concrete recommendations.

🔬 SCIENCE-BACKED CALCULATIONS

Production estimates use 6 climate zones calibrated against PVGIS (European Commission), NREL PVWatts (US), and NASA POWER satellite data. Automatic hemisphere adaptation: Paris, Lima, Sydney, Sanaa, Reykjavik.

💰 FINANCIAL SIMULATOR

Annual savings, payback period, self-consumption rate, year-by-year ROI. Uses your local electricity price.

📅 SEASONAL CALENDAR (Adjustable mounts)

Recommended angle at each equinox and solstice. Tilt 2× or 4× per year and gain up to 8% production over a fixed mount.

📈 ENERGY MONITORING

Enter your monthly production and compare it to the estimate. Get alerts when your installation produces less energy than expected.

🗺️ ROOF MAPPING

Draw your roof outline on a satellite map and estimate usable panel area.

📄 PDF REPORTS

Three levels: Simple (1 page), Detailed, or Pro with client data. Useful for personal records, maintenance, installer discussions, client files, or project documentation.

📡 OFFLINE MODE

No mobile network available? In an isolated location? Opti Solar falls back to local calculation. No errors, no interruptions.

🔧 DESIGNED FOR OUTDOOR USE

Manual light and dark theme, voice readout of measurements, large display, simple wording.

🏆 BADGES AND PROGRESSION

Unlock 8 badges by exploring features: Explorer, Excellence, Reporter, Cartographer and more.

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✅ FREE — No ads, no registration, no tracking beyond anonymous crash reports

• Precision compass and inclinometer

• Solar production estimate (hemisphere-aware)

• Solar Score with criteria breakdown

• Financial simulator

• Seasonal calendar and notifications

• Simple PDF report

• 8 badges to unlock

⭐ PREMIUM — One-time purchase, lifetime access. No subscription. No in-app purchases beyond this one.

• Shadow Hunter (obstacle shading analysis)

• Full AR sun path

• Installation certificate photo

• Roof mapping on satellite map

• Detailed and Pro PDF reports

• Energy monitoring with charts and alerts

• Personalized Solar Score recommendations

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GOOD TO KNOW

Opti Solar is a planning and measurement tool. It does not sell solar panels, does not connect automatically to inverters, and does not guarantee production. Measurement accuracy depends on your phone sensors and magnetic interference near the panel.

Built by a single independent developer. No data sold to third parties. One app, one price, for life.