Failure in 8 Strings Detected with Heat Map Prevents Loss of 105 MWh

Context

On August 19, 2025, the Delfos platform identified anomalous behavior in one of its customers' solar assets. The alert pointed to a total interruption in the generation of eight photovoltaic strings, a problem that, without intelligent monitoring, could have gone unnoticed for weeks.

Under a manual monitoring routine, this type of failure does not generate direct alarms in traditional SCADA and tends to be identified only during periodic inspections. The impact of leaving eight strings inoperative for long periods is significant from both an energy and financial standpoint.

Implemented Solution

Delfos used its String Performance Heatmap module to quickly identify the strings with the most severe relative losses. The clear visualization in the heatmap highlighted the absence of generation in multiple strings, immediately drawing the attention of the engineering team.

With Delfos' support, an automated report was sent to the customer, accurately indicating the affected components. The O&M team was mobilized and, after an on-site inspection, confirmed that blown fuses were the cause of the failure.

With Delfos' data and visual analysis, the process between identification, verification, and correction was quick, minimizing downtime.

Achieved Results

• Fault detected by Delfos on August 19, after weeks without detection by the customer.
• Estimated loss avoided up to 105 MWh, considering the projected impact if the problem persisted for 3 months — a realistic scenario for this type of failure in large power plants.
• String generation fully restored after fuse replacement.
• Significant reduction in average fault detection time.
• Immediate communication with the customer via platform report.
  
  

Without Delfos' intervention, this failure could have lasted for weeks, causing significant energy and financial losses for the customer.

Conclusion

This case reinforces how Delfos acts not only as a monitoring platform, but as a strategic operational intelligence tool. Early detection of string failures, combined with automated and accurate communication, prevents losses and continuously improves asset performance.

The predictability, automation, and precision provided by the Delfos Platform continues to be clear differentiators in optimizing the performance of solar power plants.

• Up to 105 MWh of avoided loss
• 8 strings with zero generation identified immediately
• Root cause (blown fuses) confirmed on the day of notification
• Drastic reduction in O&M team response time