Deep guides for solar EPCs, installers, developers and roofing companies operating in the US market: NEC 2026 changes, US codes and standards, PE stamping across states, and state-by-state permit and interconnection guides. Each article is written by engineers who design permit plan sets every day.
Section 690.4(G) rounding, rapid shutdown updates, ESS integration, state adoption status and workflow updates for NEC 2026.
Read the guide →All 9 code families governing US solar design: NEC, NFPA 855, IEEE 1547, UL 1741-SB, ASCE 7-22, IBC, IRC, IFC and state amendments.
Read the guide →When PE stamps are required, structural vs electrical, multi-state licensure, and how outsourced design fits the PE-of-record workflow.
Read the guide →PSE&G, JCP&L, Atlantic City Electric, Rockland Electric interconnection, top NJ AHJs, SuSI incentive program, common rejection reasons.
Read the guide →NYC DOB, NYS Unified Solar Permit, ConEd, PSEG-LI, National Grid, NYSEG, RG&E, VDER, NY-Sun, LL92/94, historic districts.
Read the guide →PECO, PPL, Duquesne Light, FirstEnergy PA subsidiaries, Philadelphia eCLIPSE, Pittsburgh, SREC market, code adoption realities.
Read the guide →RIH Engineering delivers AHJ-ready plan sets, PE-stamped where required, aligned to every major US utility interconnection format. Solar EPCs and installers get a dedicated engineering team that learns your standards and takes permit-revision cycles off your plate.
See Solar PV Design Services Start a Conversation