What Production Recovery Looks Like on a Neglected Eastlake System
What we typically see when an Eastlake rooftop system gets its first professional cleaning after several years.
Eastlake homeowners often call us after noticing their monthly production has drifted well below year-one numbers. Here's what we generally find on systems that haven't been cleaned in years, and what one cleaning can realistically recover.
What a neglected system usually looks like
On rooftops that haven't been cleaned in two or three years, we typically see a uniform dust-and-pollen film with localized bird-dropping shadows. Inland Eastlake homes near open fields or construction tend to accumulate faster than the county average, and homeowners often don't notice the drift until they compare monthly production to their year-one numbers.
What the thermal scan often turns up
Our included FLIR scan regularly catches at least one panel running hotter than its neighbors on long-neglected arrays — usually a failing bypass diode or a hot-spot forming under stubborn soiling. Many of these are still inside the manufacturer warranty window, which is why we document temperatures and panel positions on every visit.
Typical post-clean recovery range
Across our Eastlake customers, first-time professional cleanings on multi-year-neglected systems generally recover production in the 15–25% range, consistent with NREL and Sandia soiling research for semi-arid climates. Exact recovery depends on cadence history, surrounding land use, and whether any panels need warranty replacement.