Solar PV Module performance is often discussed in terms of efficiency or wattage, but what matters just as much is how that performance holds up over time. Long-term performance depends on how well a module withstands environmental stress, material aging, and electrical wear across years of operation. This is why design choices, material selection, and testing standards are critical to ensuring reliability beyond Day 1. This month’s Watt You Need To Know looks at what truly shapes solar module p