PES Supply Newsroom
Technical guides, product reviews, code updates, and industry news for installers, EPCs, and project managers
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Battery Cable Size Chart: 12V/24V/48V Inverter & Bank Cabling | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Battery Cable Size Chart:...
EV Charger Circuit Sizing: NEC 625 Breaker, Wire & Load Calc Guide | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands EV Charger Circuit Sizing:...
Solar Wire Size Calculator: PV Wire, Ampacity & Voltage Drop for Arrays | PES
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. 2026 product line update...
Wire Duct & Cable Tray Sizing Guide: Wireway Fill, Types & NEC Rules (2026) | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Wire Duct & Cable...
Electrical Load Calculation: NEC 220 Demand Factors for Services & Feeders | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Electrical Load Calculation: NEC...
Transformer Sizing Calculator: kVA, Load & Voltage Selection | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Transformer Sizing Calculator: kVA,...
Box Fill Calculator: NEC 314.16 Conductor & Device Allowances | PES
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...
Conduit Fill Calculator: NEC Chapter 9 Tables for EMT, PVC & RMC (2026) | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Conduit Fill Calculator: NEC...
Generator Sizing Calculator: Running Watts, Starting Watts & Whole-Home Guide | PES
PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Generator Sizing Calculator: Running...
Solar System Sizing Calculator: From kWh Usage to Array Size (2026) | PES
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. 2026 product line update...
Motor FLA Chart: NEC 430.250 Full-Load Amps, Breaker & Wire Sizing | PES
Motor FLA Chart: NEC 430.250 Full-Load Amps, Breaker & Wire Sizing | PES PES PES Supply Editorial Team...
Grounding & Earthing Guide: NEC 250, GEC Sizing Chart & Ground Rod Rules (2026) | PES
Grounding & Earthing Guide: NEC 250, GEC Sizing Chart & Ground Rod Rules (2026) | PES PES PES...
AWG Wire Gauge Chart: Diameter, Resistance, Ampacity & Applications | PES
AWG Wire Gauge Chart: Diameter, Resistance, Ampacity & Applications The complete American Wire Gauge table — 40 AWG...
Battery Bank Sizing Calculator: kWh, Days of Autonomy & DoD (2026) | PES
Battery Bank Sizing Calculator: kWh, Days of Autonomy & DoD (2026) Size an off-grid or backup battery bank...
Wire Size by Amps: Ampacity Chart & Breaker Matching Guide (NEC 310.16) | PES
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...
Voltage Drop Calculator: Wire Size, Distance & NEC 3% Rule (2026) | PES
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...
Most Efficient Solar Panels of 2026: A Buyer's Guide for Installers & Homeowners
Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. I've been speccing modules...
Enphase Brand Guide: IQ7/IQ8 Microinverters, IQ Battery, and Installer Ecosystem
Updated September 2026 — content reviewed and refreshed by the PES team. For current pricing and availability, see...
Wallbox Chargers: Brand Guide for Smart EV Charging
Wallbox is the Spanish company that figured out home EV charging is an energy-management problem, not just a...
Victron Energy Brand Guide: SmartSolar, BlueSolar, MultiPlus, and Premium Off-Grid Systems
Victron Energy is the brand off-grid people argue about at boat docks and cabin builds for a reason:...
Unirac Brand Guide: SolarMount, Flashloc, and UL 3741-Compliant Racking Systems
Unirac has been bending aluminum for solar arrays since the late 1990s, and their rails are on more...
Trojan Battery Brand Guide: Deep-Cycle FLA, AGM, Gel & LFP
Trojan Battery has been building deep-cycle batteries in California since 1925, and if you've spent any time around...
Trina Solar Brand Guide: Vertex Series, 210mm Cells & Dealer Specs
Trina Solar is the brand your customer has never heard of that is probably already on their neighbor's...
Sungrow: Residential, Commercial, and Hybrid Inverter Brand Guide
Brand Guide · String & Hybrid Inverters Sungrow: Residential, Commercial & Hybrid Inverter Guide The installer's guide to...
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This Week in Power & Solar — October 20, 2026
The $0.38/W module price floor lands Dec 4, China's export rebate is gone, NEC 2026 rewrites generator shutdown rules, and standby demand keeps climbing.
This Week in Power & Solar — October 20, 2026
The $0.38/W module price floor lands Dec 4, China's export rebate is gone, NEC 2026 rewrites generator shutdown rules, and standby demand keeps climbing.
