Solar & Energy calculator
Solar Panel Cost Calculator
Estimate solar installation cost from system size and cost per watt, compare a contractor quote, or work backward from a project budget.
Enter your numbers and calculate.
Solar cost example
An 8 kW system at $2.75 per watt has an estimated gross installed cost of:
8 × 1,000 × $2.75 = $22,000
Why cost per watt matters
Cost per watt gives you a common basis for comparing solar quotes of different sizes. It does not tell you whether one proposal uses better equipment, has stronger warranties, includes electrical upgrades or provides better production.
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