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US‑DOE tool that estimates the energy production and performance of grid‑connected PV systems worldwide using typical meteorological year (TMY) data.
Comprehensive performance and financial model from NREL supporting detailed PV, concentrating solar, and storage system simulations.
#4 HelioScope
Cloud‑based PV design software that combines layout optimization with detailed performance modeling using high‑resolution weather data.
#5 PVSyst
Industry‑standard desktop software for PV system design, shading analysis, and energy yield simulation with extensive meteorological databases.
#6 Aurora Solar
Web‑based platform for solar design and sales, offering 3‑D modeling, shading analysis, and performance predictions with integrated weather data.
#7 SolarGIS
High‑resolution solar resource maps, TMY files, and PV performance tools covering the globe, often used for large‑scale project feasibility.
#8 Meteonorm
Comprehensive weather data generator providing TMY, Typical Meteorological Year, and real‑time data for solar and renewable energy simulations.
#9 PV*SOL
Dynamic simulation software for designing and analyzing PV systems, including 3‑D shading, battery storage, and grid interaction.
#10 RETScreen
Clean‑energy management software from Natural Resources Canada offering feasibility analysis, performance monitoring, and financial evaluation for PV projects.
#11 HOMER Energy
Hybrid optimization model for microgrids that includes PV, storage, and diesel generators, providing detailed performance and cost analysis.
#12 T*SOL
Specialized solar thermal simulation tool that also offers PV modules for hybrid system design and performance prediction.
Online design suite that integrates SolarEdge inverter and optimizer specifications with site‑specific solar resource data for quick yield estimates.
#14 SunDAT
Web‑based solar data platform delivering high‑resolution irradiance, temperature, and PV performance forecasts for Europe and the US.
#15 OpenSolar
Free, cloud‑based solar design and proposal tool that includes performance modeling using public weather datasets.
#16 SolarCalc
Simple online calculator for quick PV system sizing and energy production estimates using location‑specific solar radiation data.
GIS extension that provides solar radiation analysis, shading, and PV potential mapping using high‑resolution spatial data.
#18 PVlib Python
Open‑source Python library for simulating the performance of photovoltaic energy systems, supporting multiple weather data sources.
Web‑based version of NREL's SAM that allows integration of its modeling engine into custom applications via an API.
#20 Solargis API
While Solargis is the reference, its API can be used as an alternative to PVGIS for programmatic access to solar resource data.
#21 Renewables.ninja
Free open‑source platform providing hourly solar and wind generation time series for any location worldwide.