Connecting PV Systems

Why Connecting a PV System Can Be Confusing

Electrical inspector shines light on how to properly interpret the guidelines of NEC Article 705.

The increase in size of solar photovoltaic (PV) systems in recent years has made it more difficult to install the AC output into existing building panelboards, either at the electrical service location or at sub feed panelboard locations. The basic reason for this is the restriction on not loading the panelboard bus assembly to more than 120% of its rating from a summation of all power sources standpoint. To compensate for this, many PV system designers and installers are leveraging National

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