System availability chart
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Chart

Basic info
Description | System availability is the percentage of a system that is available over a period of time. It is an indicator of how quickly faults are identified and remedied. |
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Prerequisites |
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Further details | Standard formula and calculation The following system availability formula is used by default: ![]() Default system availability formula
Note The standard formula is displayed for basic partners. The VCOM module KPI editor for PR and system availabilityallows you to adapt the input parameters to your needs. |
Sample calculation
The following sample calculation is based on the standard PR formula:
Interval | Irradiance (W/m2) | Energy (kWh) | Result |
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I1 | 90 | 10 | Not rated |
I2 | 125 | 20 | 100% |
I3 | 200 | 30 | 100% |
I4 | 80 | 0 | Not rated |
I5 | 250 | 0 | 0% |
I6 | 200 | NULL* | 100% |
I7 | 150 | 30 | 100% |
I8 | 130 | 20 | 100% |
I9 | 110 | 0 | 0% |
System availability | 5/(5+2) = 71.4% | ||
*NULL means no data available for this interval. |