Solar technology has come a long way. Modules are more efficient, inverters are more capable, and system design has become increasingly refined. On paper, the industry is positioned to deliver highly predictable performance. But in the field the story is often different.
Across solar portfolios, actual performance frequently falls short of modeled expectations. The gap between expected and realized production is a long-standing issue, and addressing it has only grown more important as project economics change. This is not simply an equipment problem, it’s an operations one: Too many systems are not fully understood or actively managed once they are in service.
What makes this challenge particularly difficult to address is that it rarely presents itself in obvious ways. It is not typically a major outage or a clear system failure that drives losses. More often, it is a collection of small, persistent inefficiencies that go unnoticed or unresolved: Slight phase imbalances that never quite trigger concern, inverters that intermittently derate and recover before anyone takes a closer look, or tracker behavior that appears acceptable at a glance but is consistently under-optimized. Individually, these conditions can seem immaterial, but across a portfolio they add up quickly: A 2023 report by kWh Analytics found underperformance costs the solar industry $2.5 billion a year.
