In utility-scale solar, the industry’s data maturity has reached a turning point. It is no longer enough to simply measure irradiance – the standard is now to be able to understand and continuously optimize data quality so that production forecasts, performance ratios, and financial models accurately reflect reality.
For developers who also own and operate their assets, this shift is not theoretical; it’s a practical reality. As monitoring systems grow more capable, the accuracy of irradiance data is key to evaluating performance and protecting long-term revenue.
When “bankable” depends on the sensor
Solar irradiance data is inherently complex. Even when high-end pyranometers are calibrated in ISO-accredited laboratories, once in the real world, they encounter a wide variety of issues: soiling, misalignment, diffuse shading, humidity, extreme heat and cold, and long-term sensor drift.
Those influences don’t announce themselves. They simply accumulate. And while the resulting errors are often subtle, and can be well within the bounds of “plausible” performance variation, the long-term financial impact on multi-hundred-megawatt portfolios can be enormous.
Read the full article in Solar Power World.
Author: Wayne Burnett, Chief Strategy and Technology Officer, EKO Instruments USA Inc.
