Advanced working knowledge of residential solar and battery architecture and operation, including modules, stringing, optimizers, microinverters and string inverters, batteries, rapid shutdown, gateways, meters, communications, monitoring platforms, electrical interfaces, commissioning, and common failure modes. Coordinate with Customer Success, Field Service, Operations, Sales, Marketing, Finance, Business Systems, manufacturers, and other teams; convert frontline and fleet insights into improvements in products, installation quality, processes, training, and customer programs.