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PG&E Rule 21 Interconnection: Application & Rejection Guide 2026
A 2026 guide to the PG&E solar interconnection process for residential and light commercial installers, covering Rule 21, Your Projects, SLDs, deficiency notices, and PTO.
Team GreenLancer
1 day ago
Guide to Solar Interconnection Application Requirements
Installer guide to solar interconnection application requirements, SLDs, utility document checklists, UL 1741, IEEE 1547, net metering steps, and common revision triggers.
Sarah Lozanova
2 days ago
Solar Interconnection Agreement: Step-by-Step Process
Learn how the solar interconnection agreement process works, which review track applies to your project, and how to get utility approval and solar PTO faster.
Sarah Lozanova
2 days ago
Ground Mount Solar Design for Installers: Structures, Racking & Foundations
Ground mount solar design requires resolving structure type, racking, foundation method, and array layout before permitting begins. This guide covers every design decision for installers.
Sarah Lozanova
2 days ago
Solar Three-Line Diagram Guide for Installers
What to include in a solar three-line diagram for permit and interconnection review, with NEC 690/705 requirements, mistakes, and examples.
Sarah Lozanova
Aug 31
The 120% Rule for Solar: NEC 705.12 Calculator and Guide
The 120% rule trips up more solar permits than almost any other NEC requirement. Here's how NEC 705.12 actually works, how to calculate compliance, and what NEC 2023 changed.
Sarah Lozanova
Aug 31
Ground Mount Solar Permit Requirements & PE Stamps
Guide to ground mount solar permit requirements, structural engineering, setbacks, NEC 690, wind loads, grounding, and permit package needs for installers.
Sarah Lozanova
Aug 27
NEC 690.8 Solar Conductor Sizing: Ampacity, Derating & Wire Selection
NEC 690.8 conductor sizing for solar installers: the 125% rule, temperature derating, conduit fill, wire types, plus an interactive calculator to check your own conductor ampacity numbers.
Sarah Lozanova
Aug 27
Solar Panel Wiring Diagrams & Guide for Installers
A huge part of any solar project is how to wire the solar panels. Explore our guide on solar panel wiring to learn best practices.
Team GreenLancer
Aug 27
Solar Energy Diagram Guide: System, Wiring & SLD Guide
An installer guide to solar energy diagrams: the single line, interconnection, wiring, and storage diagrams that make up a permit-ready plan set, plus NEC 690 code details and common review rejections.
Sarah Lozanova
Aug 27
Solar PV Labeling Requirements Under the NEC
Solar permit labels can delay approval or trigger redlines. This guide covers rapid shutdown labels, placards, ESS warnings, and common AHJ mistakes.
Sarah Lozanova
Aug 27
2023 NEC Solar Code Guide for Installers
A practical guide to the 2023 NEC solar code for installers, covering Article 690, rapid shutdown, labeling, source connections, grounding, ESS, and the permit details that can prevent redlines.
Sarah Lozanova
Aug 25
Solar Battery Storage Permits: ESS Requirements for Installers
Solar battery storage permits explained: NFPA 855 ESS clearance and setbacks, NEC 706, fire review, and permit docs for installers.
Sarah Lozanova
Aug 25
Solar One Line Diagram (SLD) Requirements: Installer Guide
What goes on a solar one line diagram, what NEC 690 requires, why SLDs get rejected at plan check, and how storage changes your permit package. A practical guide for solar installers.
Sarah Lozanova
Aug 25
Solar Rapid Shutdown Requirements: NEC 690.12 Guide For Installers
A complete NEC 690.12 rapid shutdown guide for solar installers: array boundary limits, MLPE vs PVHCS, combiner box and wire size questions, commercial rooftop rules, and 2026 code changes.
Sarah Lozanova
Aug 24
Virginia Solar Permit and Interconnection Requirements: 2026 Installer Guide
A 2026 guide for Virginia solar installers covering permits, USBC codes, DPOR licensing, Dominion and APCo interconnection, net metering, coastal wind loads, plan sets, PE stamps and delays.
Sarah Lozanova
Aug 11
Utah Solar Permit and Interconnection Requirements
Utah solar permit and interconnection guide for installers: AHJ rules, S202/E200 licensing, Rocky Mountain Power Schedule 137, PE stamp triggers, HOA solar law, and storage permitting requirements.
Sarah Lozanova
Aug 11
Colorado Solar Permit and Interconnection Requirements
A 2026 guide to Colorado solar permitting and interconnection for installers, covering AHJ rules, net metering, snow load requirements, and the state licensing changes underway through 2029.
Sarah Lozanova
Aug 11
Massachusetts Solar Permit Requirements Guide
A 2026 guide for contractors on Massachusetts solar permitting and interconnection, including plan sets, PE stamps, utility processes, SMART 3.0, net metering, and the Boston permit process.
Sarah Lozanova
Aug 11
How to Create a Solar Proposal: 2026 Guide for Installers
A 2026 guide for solar installers on creating accurate solar proposals, including quotation format, ROI, incentives, timelines, equipment specs, software, and proposal mistakes to avoid.
Team GreenLancer
Aug 10
GreenLancer solar blog
The Renewable Energy Blog
The GreenLancer blog delves into the latest trends and insights in renewable energy, offering information and inspiration for solar energy and electric vehicle charging station (EVCS) contractors. Our commitment is to provide accurate information, supported by meticulous analysis and reliable clean energy sources, including government agencies, renewable energy experts, research institutions, and our in-house expertise, from over a decade in the clean energy industry.
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