Top 10 Best Solar Power System Design Software of 2026

Aurora Solar is a leading cloud-based solar design and sales platform that automates the creation of accurate 3D rooftop models using satellite imagery, LiDAR, and AI-driven tools. It enables solar professionals to perform precise shading analysis, energy production forecasting, and financial modeling to streamline system design and engineering. The software integrates seamlessly with CRM systems and sales tools, facilitating rapid proposal generation and customer approvals.

Helioscope is a cloud-based solar PV design and proposal software tailored for commercial, industrial, and utility-scale projects. It enables rapid 3D modeling, automated layout optimization, precise shade analysis, and accurate energy production forecasting using its advanced Production+ engine. The platform streamlines the design-to-proposal workflow with financial modeling, stakeholder collaboration, and exportable reports for professional sales presentations.

PVsyst is a professional-grade software for the detailed design, sizing, and performance simulation of photovoltaic (PV) systems, supporting grid-connected, stand-alone, and pumping applications. It provides precise energy yield predictions using extensive meteorological databases, module/inverter libraries, and advanced modeling of shading, soiling, and system losses. The tool is widely used by engineers for bankable simulations in utility-scale and commercial projects.

PV*SOL from Valentin Software is a professional-grade tool for designing, simulating, and optimizing grid-connected and off-grid photovoltaic (PV) systems. It features advanced 3D modeling of roofs and surroundings for precise shading analysis, yield predictions, and economic evaluations. The software integrates extensive databases of PV modules, inverters, and batteries, supporting detailed system configuration and performance simulations under real-world conditions.

OpenSolar is a cloud-based solar design and sales platform that enables professionals to create accurate 3D PV system designs, perform shading analysis, and generate professional proposals in minutes. It includes financial modeling, CRM integration, and customer portals for streamlined sales workflows. The software is fully free for unlimited use, supporting solar installers from design to installation tracking.

The System Advisor Model (SAM), developed by the National Renewable Energy Laboratory (NREL), is a free, open-source software tool for simulating the performance and financial viability of renewable energy systems, with a primary focus on solar PV, concentrating solar power (CSP), wind, and other technologies. It enables users to model system energy production, optimize designs using parametric analysis, and generate detailed cash flow projections, levelized cost of energy (LCOE), and payback periods under various scenarios. SAM is particularly valued for its rigorous, research-backed models and integration of real-world weather and financial data.

SolarEdge Designer is a free, cloud-based software tool specialized for designing residential and commercial solar PV systems, particularly those using SolarEdge inverters and power optimizers. Users can create 3D roof models, select modules and components from a vast library (including third-party options), and run detailed energy yield simulations with weather data integration. It generates professional reports, single-line electrical diagrams, and permit-ready documentation, while supporting team collaboration and real-time design sharing.

Solargraf is a cloud-based solar design software that uses AI and satellite imagery to instantly generate accurate 3D models of rooftops and solar PV systems from any address. It streamlines the design-to-proposal process with tools for shading analysis, financial modeling, energy production forecasts, and customizable proposals. Ideal for solar professionals, it integrates with CRMs and monitoring systems to support residential and light commercial projects efficiently.

Arka360 is a cloud-based solar design software that enables users to create detailed 3D models of photovoltaic (PV) systems on rooftops and ground-mounted sites. It automates panel placement, performs energy yield simulations using advanced algorithms, and generates professional proposals with financial analysis. The platform is tailored for solar EPCs, installers, and sales teams to accelerate project design, quoting, and closing deals.

EasySolar is a cloud-based software platform tailored for solar professionals, enabling rapid design of photovoltaic (PV) systems directly on 3D roof models generated from photos or addresses. It offers tools for shading analysis, energy yield calculations, and automatic generation of professional sales proposals with pricing and financial simulations. The platform emphasizes speed and sales efficiency, with mobile app support and integrations for CRM and ERP systems.