Learn how to keep your residential energy storage system clean, monitor battery health, perform simple inspections, and schedule professional check-ups. Discover practical advice to maximize. . Many homeowners find the idea of maintenance intimidating, but it doesn't have to be. National Renewable Energy Laboratory, Sandia National Laboratory, SunSpec Alliance, and the SunShot National Laboratory Multiyear Partnership (SuNLaMP) PV O&M Best Practices. . This page provides information to assist with the operation and maintenance (O&M) of photovoltaic (PV) systems. Key resources are provided for a deeper dive into the topics.