As gigawatts of commercial- and utility-scale PV power plants spring up around the world on a monthly basis, one critical industry sector that's growing in tandem is operations and maintenance, usually referred to simply as O&M. Whether the service is provided by the engineering, procurement, and construction firm or (sub)contracted to an outside vendor, the upkeep, performance, and ultimate profitability of a large solar installation depends in no small way on the competence and experience of the O&M team.