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Cost per Watt Formula:
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Cost per Watt is a metric used to compare the cost efficiency of different power systems, typically in solar energy installations or electrical equipment. It represents how much you pay for each watt of power capacity.
The calculator uses the simple formula:
Where:
Explanation: This calculation helps standardize cost comparisons between systems of different sizes by showing the cost for each unit of power capacity.
Details: Cost per watt is crucial for comparing different power solutions, budgeting for projects, and evaluating the economic efficiency of energy systems. It's particularly important in renewable energy installations where system costs are significant.
Tips: Enter the total system cost in your local currency and the system's rated power capacity in watts. Both values must be positive numbers.
Q1: What is a good cost per watt for solar panels?
A: As of 2023, residential solar systems typically range from $2.50 to $3.50 per watt before incentives, with commercial systems often lower.
Q2: Does this include installation costs?
A: For accurate comparisons, your total cost should include all expenses: equipment, installation, permits, etc.
Q3: How does cost per watt relate to payback period?
A: Lower cost per watt generally leads to faster payback, but energy production (affected by location, orientation, etc.) also impacts payback time.
Q4: Can I use this for battery storage systems?
A: Yes, but for batteries, cost per watt-hour might be more meaningful as it accounts for energy storage capacity.
Q5: Why is cost per watt important for large-scale projects?
A: Small differences in cost per watt multiplied by thousands or millions of watts can result in significant total cost differences.