PES Supply Newsroom
Technical guides, product reviews, code updates, and industry news for installers, EPCs, and project managers
Electrical Conduit Types: PVC vs. EMT vs. RMC for Solar Installations
Pick the wrong conduit for a solar job and you find out at inspection — or worse, three summers later when a UV-chalked PVC run snaps at a coupling and takes a...
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Surge Protection for Solar Systems: SPD Sizing and Installation Guide
Surge Protection for Solar Systems: SPD Sizing and Installation Guide Type 1 vs Type 2 vs Type 3...
NEC Wire Sizing Guide: Ampacity Charts for Solar and Generator Installations
NEC Wire Sizing Guide: Ampacity Charts for Solar and Generator Installations PES PES Supply Editorial Team Trade expertise...
Conduit Fill Chart: Max THHN Conductors per EMT Size (NEC)
NEC Chapter 9 conduit fill chart — max THHN/THWN-2 conductors per EMT trade size, the 40%/31%/53% fill rules,...
Wire Ampacity Chart (NEC 310.16): Copper & Aluminum by Gauge
NEC 310.16 ampacity chart for THHN/THWN-2 copper and aluminum, 14 AWG to 4/0 — plus the 60°C/75°C termination...
Standard Breaker Sizes Chart (NEC): Breaker-to-Wire Sizing Guide
Every NEC standard breaker size in one chart — plus the 125% continuous-load rule, breaker-to-wire sizing, and a...
Solar Grounding and Bonding Guide: NEC 690.43, 250, and Lightning Protection
Last Updated: August 2026 • A Code Reference for Installers, Contractors, and Inspectors • Reading time: ~20 min...
Solar Disconnect and Overcurrent Protection Guide: NEC 690 Requirements Explained
Solar Disconnect and Overcurrent Protection Guide: NEC 690 Requirements Explained Solar Disconnect and Overcurrent Protection Guide: NEC 690...
Solar Wire and Cable Guide: PV Wire vs USE-2 vs THHN — Sizing, Selection, and NEC Compliance
Solar Wire and Cable Guide: PV Wire vs USE-2 vs THHN — Sizing, Selection, and NEC Compliance Wire...
Solar Permitting Guide: NEC Requirements, AHJ Approval Process, and Inspection Checklist
Solar Permitting Guide: NEC Requirements, AHJ Approval Process, and Inspection Checklist Reading time: ~18 min · Updated for...
NEC 2026 Effective: Top Changes Solar Installers Must Implement Now
NEC 2026 Effective: Top Changes Solar Installers Must Implement Now Reading time: ~9 min read Published January 15,...
NEC 2026 Preview: Key Code Changes Solar Installers Need to Prepare For
NEC 2026 Preview: Key Code Changes Solar Installers Need to Prepare For NEC 2026 Preview: Key Code Changes...
From Safety to Efficiency: The Role of Cantex Inc.'s Electrical Junction Boxes in Modern Infrastructure Projects
I've pulled wire through enough conduit to know that the junction box is where a job lives or...
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N-Type vs TOPCon vs HJT Solar Panels: Which Technology Is Best in 2026?
Last Updated: August 2026 • Solar Cell Technology Comparison for Installers, EPCs & Commercial Buyers The solar panel market has moved beyond traditional P-type PERC. In 2026, most high-performance modules...
N-Type vs TOPCon vs HJT Solar Panels: Which Technology Is Best in 2026?
Last Updated: August 2026 • Solar Cell Technology Comparison for Installers, EPCs & Commercial Buyers The solar panel market has moved beyond traditional P-type PERC. In 2026, most high-performance modules...
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How Many Solar Panels Do I Need for 10,000 kWh Per Month? - The Complete 2026 Guide
Need 10,000 kWh per month from solar? This complete 2026 guide from Portlandia Electric Supply breaks down the exact panel count, inverter sizing, battery storage options, and costs for large-scale...
How Many Solar Panels Do I Need for 10,000 kWh Per Month? - The Complete 2026 Guide
Need 10,000 kWh per month from solar? This complete 2026 guide from Portlandia Electric Supply breaks down the exact panel count, inverter sizing, battery storage options, and costs for large-scale...
