Solar Compliance & Codes
Code-level references for the standards that decide whether a plan set survives AHJ review.
Compliance is not a separate workstream, it is the constraint set that shapes every engineering decision. This hub indexes our deep dives on the codes and standards that govern solar: NEC 2020/2023 for US electrical, ASCE 7-16/22 for wind and structural, IEEE 1547 for interconnection, UL 3741 for PV rapid shutdown labelling, plus the Indian side covering MNRE, ALMM, and state DISCOM technical specifications. Each article maps the code requirement to the design decision and the documentation it produces. Use this hub when you need to settle a specific compliance question authoritatively, then return to the permit or engineering hub for the broader workflow.
Comparisons
3 articles in this section.
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ASCE 7-22 vs IS 875: Wind Load Comparison for Solar
ASCE 7-22 vs IS 875 Part 3 for solar structures: wind speed basis, return period, pressure equations, load factors and a factor map for converting a design.
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Wind Tunnel vs Code-Based Wind Loads for Solar Structures
Wind tunnel testing vs code-based wind loads for solar: when ASCE 7-22 calculations are enough, when a tunnel study pays off, and how results enter the design.
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NEC 2023 vs NEC 2020: Solar Permit Designer Change Log
NEC 2023 vs NEC 2020 for solar: Article 690 changes, the 230.85 emergency disconnect, Article 706 updates, and what permit designers must change in plan sets.
How-To Guides
2 articles in this section.
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How to Prepare a Solar DPR for MNRE: Template and Checklist
How to prepare a solar DPR for MNRE submission: the 8 sections, data sources reviewers accept, lender ratios, and a pre-submission checklist to avoid returns.
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MNRE DCR Guidelines 2026: Compliance Checklist in 5 Gates
MNRE DCR guidelines for 2026: which schemes demand DCR compliance, what the DCR declaration must show, and a 5-gate checklist for BOQ and DISCOM submission.
Fundamentals & Deep Dives
22 articles in this section.
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IEC 62446 Acceptance Testing: Category 1 vs Category 2
IEC 62446-1 acceptance testing for grid-connected PV: which tests Category 1 and Category 2 require, the 10% pass bands, and what the handover file needs.
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ASCE 7-22 Adoption by State for Solar Design
Use this 51-jurisdiction ASCE 7-22 routing matrix to verify state code paths, local amendments, effective dates, and the controlling solar design basis.
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ASHRAE 90.1 Compliance Drawings: A Permit Guide
Build an ASHRAE 90.1 compliance drawing package that connects the adopted code, calculations, schedules, controls, commissioning, and field records.
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NEC Edition Enforced by State for Solar: 2026 Guide
Check the NEC edition used in every state and Washington, DC, then verify local amendments, effective dates, and the project AHJ before solar design.
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UL 3741 PV Hazard Control: System Design Guide
Learn how UL 3741 applies to listed PV hazard control systems, roof layouts, conductor routing, permit evidence, substitutions, and inspection closeout.
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MNRE Inverter Data Localization Rules Under PM Surya Ghar
MNRE's 17 August 2026 OM puts rooftop solar inverter data on Indian servers and gives OEMs 30 days to confirm. What it changes for EPC inverter BOQs.
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DISCOM Net Metering Compliance 2026: What to Verify
India's DISCOM net-metering rules shift by state and by order. Verified 2026 MNRE and MERC changes, plus a practical compliance checklist for installers.
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NEC 2026: What Changes for Solar Designers
NEC 2026 took effect 9 Sep 2025 and changes Articles 690, 705 and 706 for solar and storage. What is confirmed, what AHJs must adopt, and how to prepare.
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ALMM List-II Deadline: 31 December 2026 for C&I Projects
The December ALMM deadline: net-metering and open access projects commissioned by 31 December 2026 skip the List-II cell rule. Plus a countdown plan.
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ALMM List Explained: Full Form, Lists I-III and BOQ Impact
ALMM list meaning and full form: what List-I (modules), List-II (cells) and List-III (wafers, 2028) cover, and how the ALMM list changes your solar BOQ.
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ASCE 7-22 Wind Loads for Rooftop Solar: 7-16 vs 7-22
ASCE 7-16 vs 7-22 wind loads for rooftop solar: Section 29.4.4 provisions, exposure categories, what changed between editions, and a 5-step workflow.
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California Title 24 Solar Requirements: 2025 Code Checklist
California Title 24 solar requirements under the 2025 Energy Code: who must install PV, how minimum size is set, the battery credit, permit forms, a checklist.
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IEC 61724 Explained: Class A vs B, PR Formula and Sensors
IEC 61724 explained for PV engineers: IEC 61724-1 Class A and B monitoring, sensor specs by class, the performance ratio formula, data intervals and DPR text.
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IEC 62548 PV Array Design Standard: 2023 Rules Explained
IEC 62548 PV array design requirements explained: the 2023 edition, max DC voltage, string sizing, reverse-current fuses, cable rating, and NEC 690.
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IEEE 1547-2018 for Solar Interconnection: Plan-Set Checklist
IEEE 1547-2018 for solar: anti-islanding, performance categories, IEEE 1547.1-2020 tests, UL 1741 SB, utility adoption, and what the plan set must show.
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NEC 705.12 Solar Interconnection: Load-Side vs Supply-Side
NEC 705.12 sets how solar connects to a building's electrical system. The load-side 120% rule, supply-side connections, busbar maths and AHJ checks explained.
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NEC 706 Battery Storage Permits: ESS and BESS Design Guide
NEC 706 rules for battery storage permits: ESS interconnection, disconnects, NFPA 855 setbacks, and what a BESS permit package needs for solar installers.
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NEC 2023 Rapid Shutdown Compliance: A Permit Set Guide
NEC 2023 rapid shutdown compliance under 690.12: array boundary limits, initiation device, listed equipment and what the permit set must show for AHJ review.
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NEC 690.12 Rapid Shutdown: 2017, 2020 and 2023 Rules
NEC 2017 rapid shutdown rules, the NEC 2020 PV hazard control option and 2023 wording: the 30 V and 80 V limits, combiner boxes inside the boundary, and labels.
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IS 875 Part 3 (2015) Wind Load Calculation for Solar
IS 875 Part 3 2015 wind load calculation for solar structures: basic wind speed zones, k1 to k4 factors, Cp values and a worked Vb-to-STAAD chain.
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UL 1741 SA vs SB: What the Inverter Standard Proves
UL 1741 is the US safety standard for grid-tied inverters. Compare UL 1741 SA vs SB, see how SB ties to IEEE 1547-2018, plus a four-record check matrix.
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Solar Compliance in India: 2026 Regulations in 35 Q&As
India solar compliance for EPCs: the solar regulations that apply in 2026 (ALMM, CEA, BIS, net metering) in 35 answered questions, plus a document checklist.
Frequently asked questions
Quick answers to the questions we hear most about solar compliance & codes.
ASCE 7-16 or ASCE 7-22, which applies to my project?
What is UL 3741?
Does every module in India need ALMM listing?
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