Top 10 Best Solar Modeling Software of 2026

PVsyst is the industry-standard software for detailed simulation and design of photovoltaic (PV) systems, including grid-connected, stand-alone, and water-pumping configurations. It provides precise energy yield predictions by integrating high-resolution meteorological data, extensive libraries of PV modules, inverters, and trackers, and advanced modeling of losses such as shading, soiling, and thermal effects. Widely used by engineers for feasibility studies, performance optimization, and bankable reports, it excels in accuracy validated against real-world measurements.

The System Advisor Model (SAM), developed by the National Renewable Energy Laboratory (NREL), is a comprehensive desktop software for simulating the performance and financial metrics of renewable energy systems. It excels in detailed modeling of solar photovoltaic (PV), concentrating solar power (CSP), wind, battery storage, and hybrid systems, providing hourly time-series outputs for energy production and economic analysis. SAM calculates key indicators like levelized cost of energy (LCOE), net present value (NPV), and payback periods, making it a staple for project feasibility studies.

Aurora Solar is a cloud-based solar design and sales platform that enables precise 3D modeling of rooftops using satellite imagery and LiDAR data for accurate PV system layouts. It provides advanced energy yield predictions, shading analysis, financial modeling, and automated proposal generation to streamline the solar sales process. Ideal for solar professionals, it integrates with CRMs and other tools to support end-to-end workflows from site assessment to permitting.

HelioScope is a cloud-based solar PV modeling and design software tailored for utility-scale and commercial solar projects, enabling rapid simulation of energy production, shading losses, and financial metrics. It excels in handling complex terrain with 3D site modeling and physics-based ray-tracing for precise shading analysis. The platform supports batch simulations for optimizing large arrays, making it a go-to for professional engineers seeking speed and accuracy in solar modeling.

OpenSolar is a cloud-based platform designed for solar professionals to create accurate 3D PV system designs, proposals, and engineering plans rapidly. It automates roof modeling, panel optimization, shading analysis, and energy production forecasts to streamline the sales and design process. The software integrates sales tools like customizable proposals and CRM compatibility, making it efficient for high-volume workflows.

PV*SOL from Valentin Software is a professional-grade photovoltaic system design and simulation tool that enables precise 3D modeling of roofs, buildings, and surroundings for accurate shading and yield analysis. It supports detailed component selection from extensive databases of modules, inverters, and batteries, along with economic evaluations and grid compliance checks. The software generates comprehensive reports and visualizations to aid in project planning and client presentations.

SolarEdge Designer is a free web-based platform for designing and simulating solar PV systems using satellite imagery, 3D modeling, and advanced shading analysis. It optimizes layouts for SolarEdge inverters, power optimizers, and panels, providing accurate energy yield predictions and automated stringing. Users can generate detailed reports, bills of materials, and single-line diagrams for project proposals and installations.

Enphase Designer is a cloud-based solar design tool specifically optimized for systems using Enphase microinverters, IQ Batteries, and related hardware. It enables users to build precise 3D rooftop models, conduct detailed shading analysis across seasons, and simulate energy production, financial returns, and system performance. The software streamlines the design-to-installation process by generating professional proposals, single-line diagrams, and permit packages directly integrated with Enphase's ecosystem.

RETScreen is a free, government-developed software suite from Natural Resources Canada designed for clean energy project analysis, including detailed prefeasibility and feasibility studies for solar PV systems. It models energy production, financial viability, and greenhouse gas reductions using location-specific weather data and customizable system parameters. While versatile across renewables like wind and hydro, its solar module provides solid performance simulation with loss factors, shading analysis, and economic metrics, making it suitable for early-stage project evaluation.

HOMER Pro is a comprehensive software tool from UL Solutions (homerenergy.com) designed for modeling, simulating, and optimizing hybrid renewable energy systems, with strong capabilities for integrating solar PV alongside batteries, wind, generators, and grid connections. It performs detailed hour-by-hour time-series simulations, economic dispatch optimization, and sensitivity analyses to determine the least-cost system configurations. Ideal for off-grid, microgrids, and grid-tied applications, it excels in hybrid scenarios rather than standalone solar design.