US standard photovoltaic inverter

Originally, PV inverters were designed with transformers to boost converted alternating current (AC) voltage to the higher utility service levels. This transformer provided galvanic isolation of the DC side of the PV system from the AC conductors of the premises wiring system and its grounding electrode system.

New York and Massachusetts, as noted in IREC's analysis. Hawaii and California already require smart inverters that meet earlier state standards, and are now shifting to the IEEE 1547-2018 standard.

And because smart inverters can receive communications, an aggregation of distributed storage can serve as a virtual power plant, injecting power to the grid when needed. A handful of states already require new distributed resource installations to use smart inverters that meet a standard known as IEEE 1547-2018.

As several US states will soon require smart inverters for new distributed resources, and more are considering such a requirement, nearly all manufacturers will be delivering smart inverters that meet a new industry standard by August 2023, finds an analysis by the Interstate Renewable Energy Council.

SMA was the first inverter manufacturer to achieve listing to UL 1699B in 2012 and, along with other manufacturers in the industry, has updated and improved the performance of devices carrying out this critical safety feature in the decade since.

ted PV systems do not create safety or reliability problems for grid oper-ators or consumers. The Energy Policy Act of 2005 set IEEE 1547 as the national standard for interconnecting rooftop solar PV systems (and other distributed generation resources) to the grid, and