How Many Solar Panels Do I Need? 2025
How many solar panels do I need? Use our 2025 calculator to size your system by home size, kWh usage, and location.
To put this into perspective, if you install 10 square metres of monocrystalline solar panels, you could generate up to 2,200 watts (2.2 kW) of electricity, sufficient to power basic household appliances. The solar panel price varies based on type, size, and efficiency. Here's a general pricing guide in India:
The amount of solar power generated per square metre varies based on the type of solar panel used. Here's a comparison: 1. Monocrystalline Solar Panels – Up to 22% efficiency, producing 220W per square metre. 2. Polycrystalline Solar Panels – Around 18% efficiency, generating 180W per square metre. 3.
For a typical 7 kW system, expect to need 18-20 panels in this category. Standard efficiency panels are ideal if you have a large, unobstructed south-facing roof and want to prioritize lower installation costs over maximum power density. They'll deliver strong long-term performance and reliable energy production. High Efficiency Panels (400-450W)
Use a tape measure or refer to your building plans to find the roof area. Note any obstructions that might cast shadows on the panels. Typically, 1 kW of solar requires 10 square meters (or 100 square feet). Newer, more efficient panels may require less space. For Mr. Kulkarni's 2 kWp system, he needs:
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