FREE Photovoltaic software To download

SAM : System Advisor Model

The System Advisor Model (SAM) is a performance and financial free software designed to facilitate decision making for people involved in the renewable energy industry.
The current version of the SAM includes performance models for the following technologies:
- Photovoltaic systems (flat-plate and concentrating)
- Battery storage model for photovoltaic systems
- Parabolic trough concentrating solar power
- Power tower concentrating solar power (molten salt and direct steam)
- Linear Fresnel concentrating solar power
- Dish-Stirling concentrating solar power
- Conventional thermal
- Solar water heating for residential or commercial buildings
- Wind power (large and small)
- Geothermal power and geothermal co-production
- Biomass power
SAM : System Advisor Model

RETScreen (CAN)   

RETScreen 4 is an Excel-based clean energy project analysis software tool that helps decision makers quickly and inexpensively determine the technical and financial viability of potential renewable energy, energy efficiency and cogeneration projects.
Retscreen software
36 languages

HOMER Legacy v2.68

HOMER Legacy is a free computer model that simplifies the task of evaluating design options for both off-grid and grid-connected power systems for remote, stand-alone, and distributed generation (DG) applications. HOMER's optimization and sensitivity analysis algorithms allow the user to evaluate the economic and technical feasibility of a large number of technology options and to account for uncertainty in technology costs, energy resource availability, and other variables.

The Center for Energy Efficiency and Renewable Energy (CEERE) provides technological and economic solutions to environmental problems resulting from energy production, industrial, manufacturing, and commercial activities, and land use practices.
Homer solar software

As of April 14, 2015, HOMER Legacy is available only for the following uses:
1 - Academics and students working on teaching and research, or on energy access projects.
2 - Non-profit organizations working on energy access.
Absolutely no free support is available for HOMER Legacy users, including issues with installation.

This program is also available in a pro version to purchase "HOMER 2" with new features and updates : More information about HOMER 2


Skelion, is a Sketchup's plugin to insert solar photovoltaics and thermal components in a surface.
Skelion plugin gives Sketchup the possibility to insert solar panels very fast and make fast renewable solar energy studies.
Includes shadows projection and MAC OS and Windows compatible.

Skelion for SketchUp allows you to :

Exists in pro version (133 USD) with more options.

Skelion from Google Sketchup


The Hybrid2 software package is a user friendly tool to perform detailed long term performance and economic analysis on a wide variety of hybrid power systems. Hybrid2 is a probabilistic/time series computer model, using time series data for Loads, Wind speed, Solar insolation, Temperature and the power system designed or selected by the user, to predict the performance of the hybrid power system. Variations in wind speed and in load within each time step are factored into the preformance predictions. The code does not consider short term system fluctuations caused by system dynamics or component transients.

This program is not supported any more!
NREL Hybrid2


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