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United States Market Guide
The United States is the largest solar market outside China, driven by the Inflation Reduction Act (IRA) tax credits and state-level incentives. Compliance requirements vary by state, but UL and IEEE standards form the national baseline. Both residential and C&I segments are growing rapidly.
Grid Code
UL 1741 / IEEE 1547 / NEC Article 690 & 705
Regulatory Body
UL / IEEE / NREL / State PUCs
Requirements
Key Compliance Requirements
UL 1741 certification for inverters (including SA amendment for smart inverters)
IEEE 1547-2018 interconnection standard compliance
NEC Article 690 (Solar PV) and Article 705 (Interconnected Sources)
FCC Part 15 for EMC compliance
IRA Investment Tax Credit (ITC) and Production Tax Credit (PTC) eligibility documentation
State-level net metering and interconnection application requirements
UL 9540 / UL 9540A for battery energy storage systems
NRTL (Nationally Recognized Testing Laboratory) listing required
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