Homeowners can't tell if their solar system is underperforming because monitoring apps show conflicting numbers and no one explains what's normal

A homeowner with a recently installed solar-plus-battery system opens their Enphase app and sees their panels produced 45 kWh today. They open their FranklinWH battery app and it shows 32 kWh. Their utility meter shows something else entirely. Which number is right? In many installations, part of the solar array is grid-tied and bypasses the battery, so the battery management app only sees a subset of production. If a current transformer (CT) clamp was installed backwards or on the wrong wire, the monitoring system reports inverted data -- showing the home 'exporting' when it's actually importing. Daily output variations of 10-20% are normal due to weather, but homeowners have no baseline to distinguish normal fluctuation from a failing panel or tripped breaker. This matters because a solar system is only a good investment if it actually produces what was promised. Sales proposals quote annual production estimates based on ideal conditions, but actual performance depends on temperature, soiling, shading from tree growth, panel degradation, and inverter efficiency -- none of which the homeowner can evaluate from a confusing monitoring dashboard. A system could be underperforming by 15-25% for years before anyone notices, costing the homeowner hundreds of dollars annually in lost production. Without clear, unified monitoring, homeowners can't diagnose whether they need panel cleaning, tree trimming, an inverter replacement, or nothing at all. They end up either ignoring the problem (losing money) or calling a service technician unnecessarily (spending money). This problem persists because the residential solar monitoring ecosystem is fragmented across competing hardware vendors. Enphase, SolarEdge, Tesla, FranklinWH, Generac, and utility smart meters all report different metrics using different measurement points, different sampling intervals, and different definitions of 'production' vs. 'consumption' vs. 'export.' There is no industry standard for residential solar monitoring that defines what to measure, where to measure it, and how to present it to a non-technical homeowner. Installers rarely explain what 'normal' performance looks like or set up automated alerts for genuine underperformance. The result is a homeowner staring at three conflicting dashboards with no ability to evaluate their own investment.