Solar panels have no moving parts, which is why they're often sold as maintenance-free. The rest of the system is a different story, and North Texas weather is hard on all of it.
Heat is the biggest factor. Inverters and batteries lose efficiency and age faster when they run hot, and wall-mounted equipment in full afternoon sun takes the worst of it. Wiring on the roof and in the attic also suffers, with insulation becoming brittle and connectors loosening over years of heat cycles.
Spring hail can crack panel glass or damage frames without anything looking obviously wrong from the ground. Dust, pollen, and bird droppings reduce output gradually, which makes the loss easy to miss. And critters like squirrels and birds nest under arrays and chew exposed wiring.
A good maintenance visit covers the panels and racking, the wiring and connectors, the inverter and battery health, and, most usefully, a comparison of your actual production against what the system should be making. That comparison is what catches a failed optimizer or a degrading string before months of lost output add up.
Once a year is a sensible schedule for most homes, plus a check after any severe hailstorm.