Best Free Solar PV System Simulation & Design Software (2026)

Our team at Engineering Passion has researched solar design software tools that are both free and open-source that can be used to design and simulate residential and commercial solar

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PV Softwares and calculators

List of PV design Softwares and calculators, free or not free, for individuals or professionals, to download or use online.

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OpenSolar | Accelerating Solar Adoption with Free Software

OpenSolar connects homeowners, solar professionals, and partners with free software to design, sell, and manage fast, accurate solar projects.

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Download Your Ultimate Photovoltaic Generator Drawing

Accelerate your renewable energy project with our professional Photovoltaic Generator drawing. This free MechStream download is the essential, comprehensive blueprint for engineers,

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Free Solar Sales Software | Design Layouts | Energy Modeling

Simple solar sales software and layout + energy modeling app streamlines PV project development. Integrates seamlessly with AutoCAD to fast track engineering.

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Designer

SolarEdge Designer is a free solar design tool that helps PV professionals like yourself lower PV design costs and close more deals. Learn more.

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Solar Design Software | Solarius PV | ACCA

Solar System Design Software free download for one month. Study the effects of photovoltaic shading directly on the solar diagram or from a panorama photo.

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PV*SOL | The trusted software for solar design

Our video tutorial walks you through the complete process of designing a roof-parallel PV system with PV*SOL premium — from initial setup to the final simulation.

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solar panel Design Software and solar panel Calculator

Give clients or your field reps an AI tool to instantly generate preliminary PV designs and ready-to-send offers from an address — ideal for on-site meetings or to share the link with your customers.

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Aurora Solar: The World''s #1 Solar Design Software

The #1 solar software to design and sell advanced PV systems. See why installers use Aurora to create over 100,000 PV designs every week.

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