System Availability Calculator

Estimate PV system availability accounting for inverter downtime, grid outages, and scheduled maintenance.

Input Parameters

Results

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Inverter Availability
%
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System Availability
%
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Annual Downtime
hours
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Energy Loss Factor
Note: Typical utility PV system availability is 97-99%. String-level monitoring and spare inverters improve availability.

Reference

Inverter Availability = MTBF / (MTBF + MTTR) × 100 System Availability = Inv_avail × Grid_avail × Maint_factor Annual Downtime = 8760 × (1 − Sys_avail) Energy Loss Factor accounts for daylight-weighted downtime