Estimates the energy production and cost of energy of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, small building owners, installers and …

Jul 2, 2025 · Using your daily energy usage and Peak Sun Hours, and assuming a system efficiency of 70%, the calculator estimates the Wattage required for your off-grid solar …

Use our solar panel calculator to find your solar power needs and what panel size would meet them.

Calculate how much power you need with these solar calculators to estimate the size and the cost of the solar panel array needed for your home energy usage.

Calculate your daily Solar needs and get recommendations for panels, batteries & inverter—all in one place!

Solar System Calculator (SSC) — free, easy-to-use web tool to size solar panels, batteries and inverters for residential off-grid systems. Calculate load, inverter size, battery capacity and …

It factors in location-based solar efficiency, panel output, and daily sun hours to provide accurate system sizing in kW. Designed for both residential and commercial users, this calculator helps …

When sizing a solar system, follow these steps to find out exactly what will cover your energy needs. If you'd just like a quick estimate without having to work through the math, feel free to …

Jun 14, 2025 · Calculate solar panel system requirements, energy production, and financial returns for residential and commercial installations. This calculator helps homeowners and …

Estimate solar system size with or without battery back up. Connect with expert installers.