Path-Q Solar
What data-sampling interval is useful for detecting intermittent solar faults?
Answer
Use the shortest interval the monitoring system reliably provides for the suspected fault; interval data of roughly one to five minutes is often more useful than hourly or daily totals for brief trips, communication gaps, clipping, and repeated resets. The required interval depends on fault duration and the equipment's own event logs.
Key points
- Daily data can hide short outages that are visible in minute-level data.
- For rapid switching or protection events, inverter and device event logs may be more informative than ordinary production samples.
- Keep timestamps, time zone, daylight-saving handling, and communications status consistent.
- Use a longer history as well as high-resolution data to distinguish isolated events from recurring patterns.
What it depends on
- Fault duration and repetition rate
- Monitoring platform and device capabilities
- Whether data records production, power, voltage, status, or communications
- Clock synchronization and data completeness
Risks and trade-offs
- Shorter intervals create more data and may expose gaps caused by the monitoring connection rather than the power system.
- A sample can miss an event occurring between measurements.
- Monitoring data may not prove the electrical cause without on-site testing.
Information you may need
- Suspected event duration and symptoms
- Available sampling intervals and event logs
- Inverter, optimizer, or gateway model information
- Historical data around known fault times
Your next step
What to do next
Export the highest-resolution data and equipment event logs available, then compare communication status with production and inverter states.
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