Whether you are the rookie who wants to understand how solar-electricsystems work, or that better describes your spouse, friend, or prospective customer, this article explains the guts and bolts of the three most common options in solarelectric systems: grid-intertied, grid-intertied with battery backup, and off-grid (stand-alone).

Understanding the basic components of an RE system and how they function is not an overwhelming task. Here are some brief descriptions of the common equipment used in grid-intertied and off-grid solar-electric systems. Systems vary—not all equipment is necessary for every system type. In the diagrams, the numbers in red correspond to the components needed.

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