List of the Top 8 Free Solar Design Software in 2025

A thorough evaluation of solar energy potential is crucial at the pre-feasibility phase of any project. Not only is it necessary to obtain trustworthy results, but the analysis must also be performed in a timely manner. Resources like Solargis's iMaps and pvPlanner provide rapid access to accurate solar yield predictions. The new Prospect tool further improves the accuracy of these forecasts while promoting collaboration throughout the solar project development stages. Among the various sources of solar data, Solargis is distinguished for its exceptional precision and dependability, a claim backed by numerous independent studies. This data has been validated in over 1,000 locations across the globe, with validation statistics for more than 180 accessible non-confidential sites showcased on the validation map. Additionally, while well-known simulation tools like PVsyst offer advanced features for designing systems and modeling energy, it is essential to recognize that the default weather data included may not always be reliable. Consequently, employing validated solar data is critical for maximizing project success, and leveraging such resources can significantly enhance overall project outcomes.

The RETScreen® Clean Energy Management Software platform supports the planning, implementation, tracking, and assessment of low-carbon projects. Users can access the more sophisticated version, RETScreen Expert, in Viewer mode without any cost. Collaborating with governmental and multilateral organizations, we work together to develop and secure funding for improved versions of the RETScreen® platform. RETScreen Expert provides an array of tools for benchmarking, feasibility analysis, performance assessment, and portfolio management, catering to various facility types, including commercial, institutional, residential, industrial, and power generation, all within a single comprehensive platform. Our innovation lab is committed to maintaining the RETScreen software's leadership role in the transition to clean energy technology, ensuring that we continually enhance our offerings to meet the complex needs of our wide-ranging and growing global user community. This dedication to progress and user engagement fuels our ongoing efforts to improve clean energy management solutions, ultimately contributing to a more sustainable future.

PVSketch is an intuitive web-based application designed to streamline the development of solar energy projects. Its user-friendly interface allows sales representatives to access a detailed layout tool without requiring extensive prior knowledge. This cutting-edge tool significantly improves the visualization of solar solutions while delivering trustworthy energy modeling features. As part of the broader PVComplete ecosystem, PVSketch fosters effective collaboration among solar developers, installers, and engineers, enhancing both workflow efficiency and accuracy. Sales representatives can quickly kickstart projects online using PVSketch, which can then be seamlessly transitioned to PVCAD, an AutoCAD plugin, for comprehensive engineering design. By simplifying solar design, PVSketch empowers users to assemble complete solar projects in just five clicks. The platform's easy-to-use drawing tools ensure that anyone can achieve precise solar designs effortlessly. With a single click, users can generate a full layout, while those looking to enhance their projects further can refine their designs into more intricate configurations, raising the overall quality. Ultimately, PVSketch not only accelerates the early stages of solar project creation but also equips users with the tools to develop sophisticated and customized energy solutions. This capacity to adapt and modify designs makes PVSketch an invaluable resource for anyone involved in solar energy development.

SunDAT provides an innovative web-based platform for the design of utility-scale and commercial solar photovoltaic systems. Utilizing advanced patented technology, it aims to enhance the Ground Coverage Ratio (GCR) and increase energy production, even in difficult terrain. The system efficiently navigates complex boundaries and obstacles, greatly streamlining the design workflow. By automating various tasks, SunDAT significantly boosts the efficiency of solar design processes, allowing users to easily locate steep slopes or areas within an array that may require grading or should be avoided. Furthermore, the software allows for the creation of visual heatmaps, which can be exported to PVsyst for in-depth analysis, along with facilitating pile length calculations with ease. It supports exporting project data in multiple formats, including PDF, DXF, and DAE, which enhances its compatibility with design programs like AutoCAD and PVsyst for additional refinement and assessment. SunDAT Web is specifically designed to cater to both large utility projects and commercial PV installations, ranging from expansive 150MW ground-mount systems to smaller 2 MW rooftop projects. With SunDAT, users can be confident that their solar designs are not only effective in energy production but also optimized for the best use of available land. This comprehensive tool is essential for professionals aiming to maximize their renewable energy initiatives.

Effortlessly generate residential solar designs that are permit-ready at no cost. In just minutes, you can create a comprehensive permit package for as low as $49, all with a simple click. With the touch of a button, you can produce a solar permit package ready for submission. Each interaction is designed for maximum efficiency and convenience, making it incredibly accessible for users. Lyra is so intuitively structured that even experienced solar industry professionals can begin utilizing it immediately, without any prior training required. You can generate precisely what is needed for a permit, whether it’s a straightforward preliminary design or a complex, component-level permit-ready version. With just one click, convert your design into a permit package, showcasing just how simple the process is. The Lyra solar design tool is entirely free to use, needing only your email to initiate your first design. We also partner with solar design software companies to enhance their offerings. If your product currently does not support permit packaging features, reach out to us for potential collaboration opportunities. By working together, we can broaden our impact and enhance the tools available to solar professionals worldwide. This collaborative approach not only benefits individual users but also contributes to the growth and improvement of the solar industry as a whole.

Web Solar Cloud is a user-friendly online platform designed for the swift creation of solar project designs. This tool enables users to generate professional-grade solar layouts efficiently, making it accessible even for beginners in solar design. Additionally, the software compiles a comprehensive documentation package that fulfills local permitting requirements, which encompasses intricate solar panel arrangements and electrical schematics. This makes the entire process of solar project planning not only simpler but also more streamlined for users.

SolarEdge Designer is a free online resource tailored for professionals in the solar industry, aimed at substantially lowering the expenses linked to photovoltaic design while facilitating the creation of compelling client proposals. This comprehensive platform empowers users to design, build, and validate SolarEdge systems for both residential and commercial applications, spanning from the initial idea to the final installation, which is vital for securing sales. Users benefit from an efficient design workflow that integrates a variety of automated features, such as stringing, quick design validation, identification of various obstacles, and bulk mapping of Power Optimizer barcodes. Moreover, site layouts can be easily exported to the SolarEdge Monitoring Platform, streamlining project management. To enhance customer engagement, the tool generates persuasive proposals that include thorough reports and accurate energy simulations, independently verified by DNV GL. The financial analytics capabilities provide precise assessments of potential savings on energy costs and return on investment for system owners. Additionally, the platform includes an impressive 3D simulation of the project site, further enriching the visual appeal of the proposals presented. By leveraging this advanced tool, solar industry professionals can not only refine their sales techniques but also significantly boost client satisfaction and confidence in their offerings. Ultimately, this innovative solution stands to transform how solar projects are conceived and sold, paving the way for greater industry success.

Archelios PRO serves as an all-encompassing simulation and design tool specifically designed for experts in the photovoltaic field, offering a cohesive approach to every facet of solar project development. This innovative software allows users to meticulously design, size, simulate, and manage photovoltaic systems with exceptional precision and effectiveness. By utilizing cutting-edge technology, Archelios PRO significantly boosts the energy efficiency and financial gains of solar projects while complying with crucial regulatory and technical requirements. The platform also includes powerful features for optimizing self-consumption, ensuring that the produced energy is used effectively on-site. Additionally, Archelios PRO is supported by a dedicated technical assistance team and receives regular updates, ensuring that users remain informed about the latest trends and advancements in the ever-evolving solar industry. This dedication to continuous improvement not only enhances the overall user experience but also empowers professionals to adapt more readily to the shifting dynamics of the energy sector. Ultimately, Archelios PRO stands out as a vital resource for those committed to maximizing the potential of solar energy solutions.