Free DIY solar sizing calculator to estimate how many solar panels, batteries, and inverters you need for your off-grid system.
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Calculating how many solar panels you need can be done with
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Calculate how many solar panels you need based on your daily power usage. Instantly size your inverter, battery bank, and wiring with this free solar calculator.
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Calculating how many solar panels you need can be done with the three inputs above, but digging deeper reveals many more factors in determining your ideal solar panel system size.
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Are you looking to install solar but unsure how many solar panels are required to meet your energy goals? Use this calculator to estimate the number of panels you need to maximize savings and take
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Use the calculator above to translate your energy needs into a right-sized solar array. This guide explains the equations, what each input means, and how to avoid the most common
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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.
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How Many Solar Panels Do I Need To Power a House? Solar Panel Sizing Calculator. How To Calculate Solar Panel Needs.
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Stop guessing. Use our 2026 visual calculator to find exactly how many solar panels you need based on your electric bill, roof size, and 400W+ panel efficiency.
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Calculate solar panel size, battery, inverter needs for homes. Free rooftop & off-grid calculator, how many solar panels you needs.
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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
Learn MoreV4V Super Power Africa is a leading energy storage equipment manufacturer and integrator based in South Africa, serving the African continent. We specialize in lithium‑ion battery storage, sodium‑ion battery storage, system‑level battery management (BMS), energy conversion systems (PCS), communication cabinets for telecom infrastructure, commercial & industrial energy storage cabinets, integrated photovoltaic storage systems, distributed energy resources, deep discharge applications, and turnkey energy storage solutions. As a full‑service energy storage equipment manufacturer, we also provide 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 distributed energy resources to 20ft/40ft mobile containers and outdoor all‑in‑one storage cabinets. We are a leading energy storage equipment manufacturer, offering communication cabinets for 5G/telecom, server racks for data centers, and lithium‑ion & sodium‑ion battery modules with integrated BMS. 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, PV+storage integration or large zero‑carbon parks, our products feature advanced thermal management, PCS and EMS integration, deep discharge cycling, and compliance with South African and international standards. We also provide professional energy storage system installation and after‑sales support across Africa.