Top 10 Best Solar Proposal Software of 2026

Aurora Solar is a leading cloud-based solar proposal software that enables solar professionals to create accurate 3D designs, forecast energy production, perform financial analysis, and generate professional proposals. It leverages advanced satellite imagery, LiDAR data, and AI-driven tools for precise shading analysis and system optimization. The platform streamlines the entire sales process, from site assessment to permitting, making it ideal for scaling solar businesses.

OpenSolar is a cloud-based solar proposal software that allows solar professionals to design PV systems, generate financial proposals, and manage sales pipelines in minutes. It features intuitive 3D modeling, shade analysis, rebate calculators, and CRM integrations to streamline the entire sales process from site survey to contract signing. Widely used by thousands of installers worldwide, it emphasizes speed and accuracy to close deals faster.

HelioScope is a cloud-based solar PV design and modeling software tailored for commercial and utility-scale projects, enabling rapid 3D array layouts, shading analysis, and energy yield simulations. It streamlines the proposal process with integrated financial modeling, customizable reports, and bankable production estimates. Users can iterate designs quickly using parametric tools, making it ideal for engineering firms handling large-scale installations.

Solargraf is a solar design and proposal software that automates the creation of accurate 3D models, shading analysis, and professional proposals using satellite imagery and AI-driven tools. It streamlines the sales process for solar installers by generating energy production forecasts, financial breakdowns, and customizable PDFs in minutes. The platform supports residential projects with integrations for CRM, payment processing, and project management systems.

Pylon is a cloud-based solar proposal software designed for solar installers to create professional, interactive 3D proposals quickly using satellite imagery and automated design tools. It generates photorealistic renders, financial breakdowns, and customizable templates to help close deals faster. The platform streamlines the process from site analysis to client presentation, reducing proposal time from hours to minutes.

Energy Toolbase is a robust solar proposal software platform designed for designing PV and energy storage systems, generating professional proposals, and conducting detailed financial modeling. It caters primarily to commercial and utility-scale projects, offering performance simulations, incentive tracking, and asset management tools. The software streamlines the sales-to-engineering workflow with customizable templates and integrations for monitoring systems.

Sighten is a cloud-based solar proposal software that empowers solar installers to create professional, interactive proposals with 3D roof designs, financial modeling, and e-signing capabilities. It streamlines the sales process by automating calculations for incentives, loans, and ROI, while allowing customization of branding and layouts. The platform integrates with CRMs like Aurora Solar and Salesforce, making it efficient for teams handling high-volume leads.

EasySolar is a solar proposal software designed for PV installers and sales teams, enabling rapid creation of 3D roof models, shading analysis, and professional proposals. It automates financial calculations, energy yield predictions, and customized quotes with drag-and-drop tools. The platform integrates CRM functionality and a customer portal to manage leads and follow-ups efficiently.

PVsyst is a leading photovoltaic system design and simulation software used by engineers for detailed modeling of solar PV installations. It excels in performance predictions, including energy yield calculations, shading analysis, and system optimization using extensive component databases. While powerful for technical simulations, it is less oriented toward streamlined proposal generation or sales workflows compared to dedicated proposal tools.

The System Advisor Model (SAM), developed by the National Renewable Energy Laboratory (NREL), is a free desktop software tool for simulating the performance and financial metrics of renewable energy systems, particularly solar PV, CSP, wind, and battery storage. It enables detailed techno-economic analysis, including energy yield predictions, LCOE calculations, and cash flow modeling based on user-defined inputs like weather data, equipment specs, and incentives. While excellent for research and engineering validation, it lacks polished proposal generation features tailored for sales teams.