Top 10 Best Photovoltaic Design Software of 2026

Aurora Solar is a leading cloud-based photovoltaic design and sales platform that enables users to create accurate 3D solar system models, perform precise shading analysis using LiDAR and satellite imagery, and generate financial proposals. It streamlines the entire solar project lifecycle from site assessment and design to permitting and customer sales. The software integrates with CRM systems and offers mobile accessibility for on-site work.

Helioscope is a cloud-based photovoltaic design software specialized for commercial and utility-scale solar projects, enabling rapid 3D modeling, shading analysis, and energy production forecasting. It automates layout optimization, financial analysis, and proposal generation to streamline the design-to-proposal workflow. Users benefit from accurate simulations using high-resolution LiDAR data and module-level modeling for thousands of panels.

PVSyst is a comprehensive photovoltaic system design and simulation software used for sizing, optimizing, and predicting the performance of grid-connected, stand-alone, and PV pumping systems. It features an extensive database of PV modules, inverters, and meteorological data, enabling detailed analysis of losses, shading effects, and system economics. Renowned for its precision in yield predictions, it's a staple for professional engineers and researchers in the solar industry.

PV*SOL, developed by Valentin Software, is a professional-grade photovoltaic design and simulation tool for planning grid-connected, off-grid, and hybrid PV systems with storage. It excels in 3D modeling of roofs, terrain, and shading objects to deliver precise energy yield forecasts, financial analysis, and system optimization. The software includes extensive databases of PV modules, inverters, and batteries, supporting detailed single-line diagrams and compliance reporting.

OpenSolar is a cloud-based photovoltaic design and sales platform that automates the creation of 3D solar system designs, financial proposals, and customer presentations for solar installers and sales teams. It uses satellite imagery and AI to rapidly model roofs, optimize PV layouts, and generate bankable proposals with performance estimates and financing options. The tool streamlines the sales process by integrating with CRMs and enabling unlimited free designs, making it accessible for businesses of all sizes.

SAM (System Advisor Model), developed by the National Renewable Energy Laboratory (NREL), is a free software tool for techno-economic modeling of renewable energy systems, with robust capabilities for photovoltaic (PV) system design and analysis. It enables detailed simulations of PV performance using hourly or sub-hourly weather data, accounting for module degradation, soiling, mismatch losses, and system configurations like fixed-tilt, tracking, and bifacial panels. Users can also perform financial analyses, including levelized cost of energy (LCOE), cash flow projections, and incentive modeling for residential to utility-scale projects.

SolarEdge Designer is a free, web-based photovoltaic design software tailored for SolarEdge hardware, allowing users to model rooftops in 3D, select modules and inverters, and simulate system performance. It automatically optimizes string configurations using SolarEdge power optimizers for maximum energy production and provides detailed reports, proposals, and financial analysis. Ideal for quick, accurate designs within the SolarEdge ecosystem, it integrates seamlessly with SolarEdge monitoring platforms.

Enphase Designer is a cloud-based photovoltaic design tool optimized for Enphase microinverter-based solar systems. It allows users to model rooftops in 3D, automatically layout PV modules and microinverters, simulate energy production, and generate professional proposals and permit packages. The software integrates deeply with the Enphase ecosystem, including batteries and monitoring, for accurate system optimization and performance forecasting.

Sunny Design is a free desktop application from SMA Solar Technology for designing grid-connected photovoltaic systems. It enables users to select modules and inverters, optimize string configurations, simulate annual energy yields using precise meteorological data, and generate professional reports. The tool excels in system sizing and performance analysis, particularly for SMA-compatible hardware.

BlueSol is a professional software for designing, simulating, and optimizing photovoltaic systems, including grid-connected, off-grid, and hybrid setups. It features extensive component databases, 3D shading analysis, economic evaluations, and automated report generation compliant with European standards. The tool supports detailed single-line diagrams, performance simulations, and project documentation for installers and engineers.