Estimate annual operations and maintenance costs for solar PV systems based on size, age, and warranty coverage.
Input Parameters
Results
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Annual O&M Cost
$/yr
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O&M Cost
$/kWh
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25-Year O&M Total
$
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Next Major Expense
Note: Typical O&M costs are $10-20/kW/year for residential and $8-15/kW/year for commercial. Costs increase with age. Inverter replacement is the largest single maintenance expense.
Reference
Annual O&M = System Size x Base Rate x Age Factor
Age Factor = 1 + (Age x 2%)
O&M per kWh = Annual O&M / Annual Generation
Annual Gen = Size x 1500 kWh/kW x 0.995^age
Inverter replaced at ~12 and ~24 years