Solar Panel Cost Calculator
Calculate solar panel system cost based on system size and panel specifications
Solar Panel Cost Calculator
Simple and Accurate Cost Estimation
Calculation Results:
System Size: 0 kW
Number of Panels: 0
Panel Wattage: 0 W
Total System Wattage: 0 W
Total Solar Panel Cost: $0
Cost per Watt: $0.00/W
How to Use the Solar Panel Cost Calculator
Step 1: Enter System Size
- Determine your required system size in kilowatts (kW)
- Check your electricity bill for monthly usage
- Typical residential systems: 3-10 kW
- Commercial systems: 10-100+ kW
- Enter the system size in the calculator
Step 2: Panel Specifications
- Enter the wattage of individual solar panels
- Common panel sizes: 250W, 300W, 350W, 400W
- Higher wattage panels = fewer panels needed
- Check manufacturer specifications
- Consider available roof space
Step 3: Cost Calculation
- Choose cost calculation method
- Per Watt: Industry standard pricing method
- Per Panel: Direct panel cost method
- Enter the cost based on your quotes
- Click calculate to get total system cost
How to Calculate Solar Panel Cost
System Sizing
Calculate the number of panels needed:
- Convert system size to watts: kW × 1000
- Divide by individual panel wattage
- Round up to nearest whole number
- This gives total panels required
Cost Calculation
- Per Watt Method: System watts × Cost per watt
- Per Panel Method: Number of panels × Cost per panel
- Both methods give total equipment cost
- Does not include installation or other costs
Real-Life Calculation Example
Scenario: 6 kW solar system with 300W panels
Step 1: Calculate Number of Panels
• System Size: 6 kW = 6,000 W
• Panel Wattage: 300 W each
• Number of Panels: 6,000 W ÷ 300 W = 20 panels
Step 2: Cost Calculation (Per Watt Method)
• Cost per Watt: $1.50/W
• Total Cost: 6,000 W × $1.50/W = $9,000
Step 3: Cost Calculation (Per Panel Method)
• Cost per Panel: $450
• Total Cost: 20 panels × $450 = $9,000
Step 4: Final Results
• System Size: 6 kW
• Number of Panels: 20
• Total System Wattage: 6,000 W
• Total Solar Panel Cost: $9,000
• Cost per Watt: $1.50/W
Calculation Formulas
Number of Panels:
System Size (W) ÷ Panel Wattage (W)
Total Cost (Per Watt):
System Size (W) × Cost per Watt ($)
Total Cost (Per Panel):
Number of Panels × Cost per Panel ($)
Cost per Watt:
Total Cost ($) ÷ System Size (W)
Cost Factors to Consider
Monocrystalline: Higher cost, better efficiency
Polycrystalline: Lower cost, good performance
Higher wattage panels cost more per panel
But require fewer panels for same system size
Prices vary by manufacturer and supplier
Bulk purchases often get better rates
This calculator shows panel cost only
Add inverters, mounting, installation costs
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