The best solar design software will help you build more cost-effective solar systems for your clients, which will lead to more sales and greater customer satisfaction.
Compare the best Free Solar software of 2026 for your business. Find the highest rated Free Solar software pricing, reviews, free demos, trials, and more.
OpenSolar connects homeowners, solar professionals, and partners with free software to design, sell, and manage fast, accurate solar projects.
List of free solar thermal softwares online or to download, solar design and calculation of hot water systems, solar heating panel energy output
Valentin Software develops software products for the simulation, design and prognosis of photovoltaic, solar thermal and heat pump systems. T*SOL online is a free tool for the simulation and yield
No matter whether for domestic water heating, heating support, swimming pools or process heat, with T*SOL you can optimally design your planned solar thermal system, dimension storage and collector
In the renewable energy sector, utilizing the right solar software is essential for optimizing solar projects, managing resources, and maximizing energy production. Our category offers a
In this way, the application offers different levels of training that will provide the user with the essential knowledge and skills on the fundamental principles of operation and functioning of solar thermal
PV*SOL premium by Valentin Software is the industry standard for planning and designing efficient PV systems – used by engineers, system designers, installers, and skilled technicians around the world.
PEES Power Systems is a leading provider of advanced energy solutions in South Africa and Africa. We specialize in microgrid systems, solar photovoltaic (PV) power generation, BESS (battery energy storage systems), grid‑tied / hybrid / off‑grid inverters, PCS power conversion systems, EMS energy management systems, BMS battery management systems, lithium‑ion & LiFePO4 batteries, and modular energy storage systems. Our portfolio also includes energy storage containers, energy storage cabinets, containerised power stations, off‑grid power supply systems, backup emergency power, clean energy solutions, new energy storage systems, and green power systems. We offer battery cabinets with integrated BMS, outdoor all‑in‑one storage cabinets, commercial & industrial storage, communication battery cabinets, server racks, and transformer capacity expansion services. Whether you need a small off‑grid system or a zero‑carbon factory solution, our products deliver reliability and performance.
Our modular energy storage solutions range from 20ft/40ft mobile containers to outdoor all‑in‑one energy storage cabinets. We are a leading manufacturer of battery cabinets with BMS, offering communication battery cabinets for telecom, server racks for data centers, and energy storage battery BMS systems. We utilize lithium‑ion energy storage batteries and LiFePO4 batteries for optimal safety and lifecycle. Our stackable design allows flexible capacity expansion, while our grid‑forming technology ensures stable microgrid operation. Whether for distributed PV systems, off‑grid power supply, backup emergency power, or large zero‑carbon parks, our products feature advanced thermal management, PCS and EMS integration, and compliance with South African and international standards. We also provide professional energy storage system installation and after‑sales support, and we help clients navigate energy storage subsidies where applicable.