1. What is Cost per Watt?

Cost per watt is a standard metric used in the solar industry to compare the cost-effectiveness of different solar power systems. It represents the cost of each watt of power generating capacity in the system.

2. How Does the Calculator Work?

The calculator uses this simple formula:

Where:

• Total Cost — The complete installed cost of the solar system (including panels, inverters, installation, etc.)
• System Power — The total rated power output of the system in watts

Explanation: This calculation gives you a standardized way to compare systems of different sizes and costs.

3. Importance of Cost per Watt Calculation

Details: Cost per watt helps consumers compare solar quotes on an equal basis, evaluate system value, and track industry price trends over time.

4. Using the Calculator

Tips: Enter the total installed cost of your system (in dollars) and the total system power rating in watts. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good cost per watt for solar systems?
A: As of 2024, residential systems typically range from $2.50 to $3.50 per watt before incentives. Commercial systems are often lower.

Q2: Does this include tax credits and rebates?
A: Typically cost per watt is calculated before incentives to allow standardized comparison. Post-incentive costs would be lower.

Q3: How does system size affect cost per watt?
A: Larger systems generally have lower cost per watt due to economies of scale in equipment and installation.

Q4: Should I include maintenance costs?
A: Standard cost per watt calculations only include upfront costs. Lifetime cost analyses would include maintenance.

Q5: How does this compare to cost per kWh?
A: Cost per watt measures upfront costs, while cost per kWh considers energy production over time and system efficiency.