be aquot;downaquot; during scheduled maintenance periods, then the design must be such that portions of the system can be removed from ... units must be brought to the site to provide a power source while the PV system is undergoing maintenance.
|Title||:||Photovoltaic stand-alone systems|
|Author||:||Monegon, Ltd, F.A. Costello, Inc, Bird Engineering-Research Associates, United States. National Aeronautics and Space Administration|