10 Best Solar Design Software Tools For 2025

Solar design software is specialized design software that enables solar companies to accurately plan and optimize photovoltaic (PV) systems for homeowners and commercial clients.

PV*SOL | The trusted software for solar design

PV*SOL is the industry standard for planning and designing efficient PV systems – used by engineers, system designers, installers, and skilled technicians around the world.

PV*SOL online

We then search for the optimal connection of your PV modules and the inverter that suits best. After the simulation of the system, the results are presented: Annual PV energy, Performance ratio, Own

Best Free Solar PV System Simulation & Design Software (2026)

Our team at Engineering Passion has researched solar design software tools that are both free and open-source that can be used to design and simulate residential and commercial solar

PVGIS (PV-GIS)-powerful and free online photovoltaic software

PVgis is the ideal free online tool to estimate the solar electricity production of a photovoltaic (PV) system. It gives the annual output power of solar photovoltaic panels. As a

Top 10+ Best Solar Power & Design Software Tools for PV Installers:

Explore top solar design & proposal software trusted by installers. Discover advanced solar power software and PV design tools to save time and grow your business.

OpenSolar | Accelerating Solar Adoption with Free Software

OpenSolar connects homeowners, solar professionals, and partners with free software to design, sell, and manage fast, accurate solar projects.

Photovoltaic Geographical Information System (PVGIS)

Free and open access to photovoltaic (PV) electricity generation potential for different technologies and configurations. Available in English, French, Italian, Spanish and German.

Data, software and services for solar projects | Solargis

Our software provides high-performance PV energy simulation, capabilities for data quality control, data analysis, and assembling bankable data for evaluating solar assets.

pvgis

Presents operational and performance data of a grid-connected PV system, including power generation, grid injection, and efficiency metrics.