Simple, transparent pricing

    Start learning for free. Upgrade when you need more power.

    Free

    Learn the basics

    $0forever
    • One solar array only
    • Manual winter sun input
    • On-screen results only
    • Step-by-step explanations
    • Multiple array orientations
    • Automatic location data
    • Scenario comparisons
    • PDF report download
    Start free
    Most popular

    Pro

    Full planning toolkit

    $29one-time
    • Up to 4 arrays with different orientations
    • Automatic irradiation from address
    • Scenario comparisons (battery +5 kWh, etc.)
    • Downloadable PDF report
    • Priority support
    • All Free features included

    Free version limitations

    The free version is designed for learning and exploration. Export and print functions are disabled—you'll see your results on screen only. For detailed reports and advanced features like multiple array configurations, consider upgrading to Pro.

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    The best way to learn is by doing. Try the free calculator now.

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