Top 10 Best Commercial Solar Proposal Software of 2026

Aurora Solar is a comprehensive cloud-based platform designed for solar design, engineering, and sales proposals, with robust capabilities for commercial projects including complex rooftop and ground-mount systems. It leverages advanced 3D modeling from satellite, drone, and LiDAR data to generate accurate shading analysis, energy production forecasts using bankable PVsyst-validated models, and fully customizable financial proposals. The software streamlines workflows from site assessment to permitting and customer handover, integrating with CRMs and project management tools for end-to-end commercial solar operations.

HelioScope is a powerful solar design and proposal software optimized for commercial and utility-scale PV projects, offering advanced 3D modeling, shading analysis, and energy production forecasting. It automates complex engineering tasks like layout optimization and irradiance modeling to generate accurate proposals with integrated financial analysis. Users benefit from seamless workflows that reduce design time while maintaining high precision for rooftop and ground-mount installations.

OpenSolar is a cloud-based solar design and proposal software that automates the creation of professional proposals, 3D designs, and financial analyses for both residential and commercial solar projects. It leverages aerial imagery and AI-driven tools like TrueShape for accurate roof modeling and instant system layouts. The platform streamlines sales workflows with CRM integrations and customer portals, making it efficient for solar businesses.

Energy Toolbase is a cloud-based platform tailored for commercial solar developers, EPC firms, and financiers, enabling precise energy production modeling, detailed financial pro forma analysis, and professional proposal generation. It supports complex tariff structures, incentives, and rebate tracking to optimize project economics. The software integrates with design tools like Aurora Solar and Helioscope, streamlining workflows from simulation to sales handoff.

PVsyst is a leading PV system simulation software used for detailed design, performance prediction, and analysis of solar installations ranging from residential to large commercial and utility-scale projects. It excels in modeling complex factors like near and far shading, module soiling, mismatch losses, and grid interactions to provide accurate energy yield forecasts. While not a full proposal generation tool, it's integral for commercial solar proposals requiring validated technical simulations.

PVcomplete is a specialized software platform for commercial solar proposal generation, offering advanced 3D modeling, precise shading analysis with LiDAR integration, and comprehensive financial pro formas. It enables solar professionals to design rooftop PV systems, forecast energy production accurately, and produce professional-grade proposals tailored for commercial clients. The tool excels in handling complex commercial projects with detailed economic analysis and customizable reporting.

Solargraf is an AI-powered solar design and proposal software tailored for commercial solar projects, enabling users to generate professional proposals in minutes using satellite imagery and LiDAR data. It automates 3D modeling, shade analysis, energy production forecasts, and financial modeling with integrated incentives and ROI calculations. The platform also facilitates permitting documentation and stakeholder presentations, streamlining the sales process for solar EPCs and developers.

Sighten is a cloud-based software platform tailored for commercial solar proposal generation, enabling users to create professional proposals with integrated 3D modeling, shading analysis, and financial modeling. It automates the design-to-proposal workflow, supporting complex rooftop and ground-mount systems for industrial and commercial clients. The tool emphasizes accuracy in irradiance calculations and customizable financial outputs to streamline sales processes.

PV*SOL from Valentin Software is a professional-grade photovoltaic design and simulation tool tailored for detailed planning of solar systems, including commercial installations. It enables 3D modeling of complex roofs and structures, precise shading analysis via ray-tracing, energy yield simulations, and generation of professional PDF proposals with economic evaluations. Primarily a desktop application for Windows, it supports large-scale commercial projects with extensive module and inverter databases.

The System Advisor Model (SAM), developed by the National Renewable Energy Laboratory (NREL), is a free, open-source software tool for simulating the technical and financial performance of renewable energy systems, with a primary focus on solar PV, CSP, wind, and other technologies. For commercial solar proposals, it excels in detailed energy yield predictions, shading analysis, and financial metrics like LCOE, IRR, and payback periods using physics-based models. Users can input site-specific weather data, module specs, and financing details to generate precise outputs for project feasibility studies. However, it's geared more toward engineering analysis than streamlined sales proposals.