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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
12 hours ago
What Is GreenLancer? Solar Energy Services Explained
GreenLancer is dedicated to accelerating the adoption of clean energy by addressing key challenges in solar project planning and execution.
Team GreenLancer
15 hours ago
Common Solar Panel Defects, Damage & Problems: A Homeowner's Guide
Learn how to identify solar panel defects, corrosion, hot spots, cracks, PID, diode failures, and abnormal degradation, plus how one failing module can affect system production.
Sarah Lozanova
3 days ago
Choosing The Best Solar Design & Proposal Software in 2026
See how Aurora Solar, OpenSolar, HelioScope, Solargraf, PVCAD, Arka 360, and Pylon compare on pricing, proposals, CRM, and design accuracy for residential and light commercial installers.
Sarah Lozanova
4 days ago
Solar Racking & Mounting Systems Guide for PV Installers
Learn how to choose the right solar racking systems for residential, commercial, and ground mount projects, including UL 2703 rules, structural loads, costs, installation best practices, and top manufacturers.
Sarah Lozanova
4 days ago
How to Perform a Solar Site Survey: Assessment Checklist & Tools
A practical guide for solar contractors covering site survey checklists, assessment tools, roof and electrical reviews, remote surveys, drones, safety, report formats, and design handoff.
Sarah Lozanova
4 days ago
Solar Ready Building Code Requirements
A practical guide to solar ready building codes: how IECC appendices get adopted, roof and electrical requirements, and examples from Massachusetts and St. Louis.
Sarah Lozanova
4 days ago
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
4 days ago
California Solar Mandate: 2026 Title 24 Guide for Installers
California's 2025 Title 24 code changed PV and battery sizing for new construction. This guide covers the formulas, battery-ready rules, ADU treatment, and permitting for installers.
Sarah Lozanova
Jul 19
Adding Solar Panels to an Existing System: Cost, Compatibility & Permits
Can you add solar panels to an existing system? Learn how inverter capacity, roof space, permits, net metering, electrical upgrades, and costs shape a practical home expansion.
Sarah Lozanova
Jul 17
Solar Carports & Parking Canopies: Complete Guide for Installers
A 2026 guide to solar carports, parking canopies, and parking structures for installers, covering costs, EV charger integration, permitting, interconnection, and manufacturers.
Austin Brentley
Jul 15
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
Why Do I Still Have a Utility Bill With Solar Panels?
Many homeowners are surprised when their solar system doesn’t cover all their electricity usage, even when the panels seem to be producing plenty of power.
Sarah Lozanova
Jul 9
How to Reset an Inverter Fault: Decoding Solar Inverter Fault Codes
Learn how to reset inverter fault issues, read solar inverter fault codes, and troubleshoot common inverter shutdowns.
Sarah Lozanova
Jul 8
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
Jun 1
Solar Inverter Repairs: Costs, Warning Signs & When to Replace
Solar inverter repair guide for homeowners covering warning signs, repair costs, warranty claims, troubleshooting steps, and when to repair or replace your inverter.
Sarah Lozanova
May 14
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
May 12
MPPT Solar Charge Controllers: Sizing, Selection & Wiring
An installer's guide to MPPT solar charge controllers for battery-based PV systems. Covers sizing, ratings, battery chemistry, wiring, manufacturer comparison, and field troubleshooting.
Sarah Lozanova
Apr 24
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
Apr 22
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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