120% rule - A term used to describe an NEC requirement that the output of a PV inverter x 125% plus the rating of the main breaker protecting the busbar can not exceed 120% of the busbar rating. III-V cell — A high-efficiency solar cell made from materials including Group III and Group V elements from the periodic table .
222220% rule - A term used to describe an NEC requirement that the output of a PV inverter x 125% plus the rating of the main breaker protecting the busbar can not exceed 120% of the busbar rating.
@20% rule - A term used to describe an NEC requirement that the output of a PV inverter x 125% plus the rating of the main breaker protecting the busbar can not exceed 120% of the busbar rating.
AC - See alternating current.
AC combiner - A term used to describe a service panel dedicated to the combining of AC circuits of a PV system. These are typically used when there are multiple string inverters or multiple microinverter branch circuits.
AIC - See amperage interrupt capability.
balance of system - Represents all components and costs other than the photovoltaic modules/array. It includes design costs, land, site preparation, system installation, support structures, power conditioning, operation and maintenance costs, indirect storage, and related costs.
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