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 system''s solar array.
Also known as a solar panel''s power rating, panel wattage is the electricity output of a specific solar panel under ideal conditions. Wattage is measured in watts (W), and 97% of solar
To top it up to 10kW, we need an additional 400W solar panel on the balcony. Here is a simple equation that will help you estimate the number of solar panels needed for differently-sized solar systems:
While it varies from home to home, US households typically need between 10 and 20 solar panels to fully offset how much electricity they use throughout the year. The goal of most solar projects is to
In 2025, residential panels typically range from 350-480 watts, with 400W being the standard choice. A 450-watt solar panel in Phoenix produces about 40% more electricity annually
How to use this calculator: Enter your monthly electricity consumption and location details to calculate required solar panel system size.
NREL''s PVWatts ® Calculator Estimates the energy production of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, small building owners, installers and
To find how many panels you need, divide 10,000 watts by the wattage of one panel. For example, if one panel is 300 watts, use this formula: Number of panels = 10,000 ÷ panel wattage.
Find out how many solar panels, batteries, and inverter capacity you need for your off-grid solar system. Going solar doesn''t have to be confusing. This free DIY solar calculator makes it
How many solar panels do I need? Use our 2025 calculator to size your system by home size, kWh usage, and location. Get panel count, roof space, and kW—free from SolarTech.
Scelto Energy Africa is a leading energy storage equipment manufacturer and integrator based in South Africa, serving the African market. We specialize in lithium-ion batteries for residential, commercial and industrial use, system-level battery management systems (BMS) for optimal performance and safety, energy conversion systems (PCS) for efficient power flow, energy storage battery system cabinets with integrated monitoring, communication cabinets for telecom and data centres, commercial & industrial energy storage cabinets for factories and warehouses, integrated PV-storage systems for seamless solar plus storage operation, distributed energy resources for microgrids and off-grid applications, and deep discharge battery technology for extended cycling. As a full-service provider, we also offer containerised BESS, modular battery racks, backup emergency power, and zero‑carbon microgrids. Our advanced lithium‑ion and sodium‑ion solutions ensure safety, scalability, and high performance for residential, commercial, industrial, and utility projects across Africa.
Our modular energy storage portfolio ranges from compact lithium-ion batteries to 20ft/40ft mobile containers and outdoor all-in-one storage cabinets with IP54 protection. We are a leading energy storage equipment manufacturer, offering communication cabinets for 5G/telecom, server racks for data centers, and IP54 rated enclosures for harsh environments. Our stackable design allows flexible capacity expansion, while our grid-forming technology ensures stable off‑grid operation. Whether for off‑grid power systems, backup emergency power, integrated PV-storage or large zero‑carbon parks, our products feature advanced thermal management, deep discharge cycling, and compliance with African and international standards. We also provide professional energy storage system installation and after‑sales support across Africa.