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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
1 day ago
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
2 days ago
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
2 days ago
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
2 days ago
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
3 days ago
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
3 days ago
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 6
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
Aug 5
SDG&E Rule 21 Interconnection: 2026 Guide for Solar Installers
A technical guide to SDG&E Rule 21 interconnection, covering DIIS submissions, Fast Track reviews, common denial reasons, SLD requirements, fees, corrections, and PTO timelines.
Team GreenLancer
Jul 31
SCE PTO Delays: Solar + Storage Interconnection Guide
SCE PTO delays run 8-12 weeks for many installers. Learn the SCE PTO timeline, top rejection reasons, SCE single line diagram requirements, NEM 2.0 deadline risks, and how to speed up SCE PTO.
Team GreenLancer
Jul 31
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
Jul 28
Solar One Line Diagram (SLD) Requirements: The Installer's 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
Jul 15
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
Jul 15
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
Apr 14
Solar Three-Line Diagram Guide for Installers
How to read, create, and submit a solar three-line diagram for AHJ approval — covering NEC requirements, common mistakes, residential and commercial examples, and permit-ready best practices.
Sarah Lozanova
Apr 4
A Guide to PV Plan Sets & Critical Mistakes to Avoid
PV plan sets are the foundation of solar permitting. Learn what solar plan design includes—layouts, schematics, diagrams, and drawings—for safe, code-compliant installs.
Sarah Lozanova
Feb 18
Solar Interconnection: How Solar Farms Connect to the Grid
Explore the role of a solar farm substation in solar interconnection for utility solar, ensuring efficient energy transfer and integration.
Sarah Lozanova
Dec 5, 2024
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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