Calculate Your Solar Panel Needs Instantly

Quickly estimate how many solar panels you need based on your energy use and sunlight hours

Perfect for home or off-grid solar planning

Solar Panel Calculator

Select Period

Energy Consumption

Example: Typical home uses 10-30 kWh daily

Average Sunlight Hours

Panel Wattage (W)

System Efficiency (%)

System efficiency accounts for losses due to wiring, inverters, and environmental factors.

How We Figure It Out

Our solar panel calculator uses industry-standard formulas to provide accurate results for both residential and commercial solar installations.

Solar Panels Needed = (Daily Energy × 1000) ÷ (Sun Hours × Panel Wattage × (Efficiency ÷ 100))

We account for real-world factors like shading, temperature, and system losses to provide accurate results.

Solar Installation Results

Solar Panels Needed

panels

Daily Energy Production

kWh per day

System Size

Annual Savings

per year

Enter your details to calculate your solar panel requirements.

Solar Benefits Overview

Reduce Bills

Save 70-100% on electricity costs

Eco Friendly

Reduce carbon footprint

Increase Value

Homes with solar sell for 4.1% more

Energy Security

Protect against power outages

Savings Projection

Why Solar Panels for Home

Solar panels for home use provide significant advantages that make them an excellent investment:

Reduced Energy Bills: Save 70-100% on electricity costs with solar power
Increased Home Value: Homes with solar sell 20% faster and for 4.1% more
Environmental Benefits: Reduce carbon footprint by 3-4 tons annually
Energy Independence: Protect against rising electricity prices

Solar Panel Sizing Guide

Determine the optimal solar panel size for your specific needs:

Residential Systems: 300-400W panels, 15-20 panels for average home
RV & 12V Systems: 100-200W panels, 2-4 panels for basic needs
Commercial Systems: 400-500W panels, 10kW to over 1MW systems

For most homeowners, a 6-8kW system provides complete energy independence at a reasonable cost.

Cost & Savings Analysis

Solar panels cost money at first, but then they save you money every month!

After about 6-8 years, your solar panels pay for themselves
Then you get free electricity for 20+ more years
Over 25 years, a typical system generates $40,000+ in savings

Frequently Asked Questions

How many solar panels do I need?

The number of solar panels you need depends on your energy consumption, location, and panel efficiency. On average, a typical home requires 20-25 panels. Use our solar panel calculator for an accurate estimate based on your specific situation.

How many solar panels to charge a Tesla?

Charging a Tesla Model 3 requires about 7-10 solar panels for daily charging (assuming 400W panels). A Tesla Model S would require 10-14 panels. Our solar production calculator can provide precise estimates based on your driving habits.

How many solar panels for 1.5 ton AC?

A 1.5 ton AC unit requires about 4-5 solar panels (400W each) to power during daytime. For 24/7 operation, you’d need additional panels and battery storage. Use our solar panel power calculator for precise calculations.

What is the 20% rule for solar panels?

The 20% rule means your solar system should not exceed 20% of your main service panel’s capacity to prevent safety issues and utility interconnection problems. This is why accurate calculation with a solar panel calculator is essential.