a bank of solar cells.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for solar panel
a panel exposed to radiation from the sun, used to heat water or, when mounted with solar cells, to produce electricity direct, esp for powering instruments in satellites
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012