Volcast - Solar Forecast

Maximize your solar investment with Volcast – the ultimate PV production forecast tool.

Stop guessing when the sun will power your home. Volcast provides an accurate, hour-by-hour solar production forecast for your PV system, covering today and the next 7 days. Designed by solar owners for solar owners, Volcast helps you align your energy-heavy tasks with peak production windows to maximize self-consumption.

SMART HOME & HOME ASSISTANT INTEGRATION

Volcast features a professional REST API for Home Assistant users. Export your forecast data directly to your HA dashboards to automate your smart home based on solar availability.

ADVANCED PHYSICS-BASED ENGINE

We combine real-time satellite irradiance data with a high-fidelity physics engine. We account for:

Multi-String Support: Perfect for complex east-west or multi-roof systems.

Bifacial Panels: Specialized modeling for modern modules.

AI Auto-Calibration: Our algorithms learn your system's performance over time.

Horizon Profiling: Accounts for shading from terrain and obstacles.

KEY FEATURES:

7-Day Precise Forecast: Hour-by-hour power prediction.

Hourly View Toggle: Switch each hour between forecast, actual production, and the difference at a tap.

Multi-Device Sync: Production history and calibration stay in sync across every device you sign in on.

Notification Center: Evening forecasts, snow warnings, and peak window alerts.

Privacy First: Secure processing, no ads, no third-party tracking.

PLANS & PRICING:

Free: 48-hour high-accuracy forecast.

Premium (monthly or yearly): Full 7-day forecast, AI calibration, and Home Assistant API access. Start with a 7-day free trial.

Terms of Use: https://volcast.app/terms

Privacy Policy: https://volcast.app/privacy

Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage subscriptions in your App Store account settings.