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White residential propane tank beside a standby generator on a concrete pad in a suburban backyard
500 gallon tank runtime

Propane Tank Sizing for Generators: Calculator | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Generator Propane Tank Sizing...

Sep 19, 20268 min read
Residential electric meter on an exterior wall beside the service entrance conduit of a suburban home
appliance wattage

Power Consumption Calculator: kWh & Cost | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...

Sep 19, 20268 min read
Galvanized round HVAC ducts and flex duct branching across a residential attic with foil insulation
duct cfm chart

Duct Size Calculator: CFM Chart by Room & Ton | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...

Sep 19, 20269 min read
Electrician measuring current with a clamp meter on a copper conductor inside a residential breaker panel
120v 240v conversion

Amps to Watts Calculator: 120V, 240V & 12V | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Amps to Watts Calculator:...

Sep 19, 20268 min read
Rooftop solar array with conduit down to an open main service panel showing the backfed PV breaker
backfeed breaker

Solar 120% Rule Calculator: Max PV Breaker | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Solar 120% Rule Calculator:...

Sep 19, 20268 min read
Commercial standby generator on a concrete pad with a wall-mounted automatic transfer switch
generator sizing

kVA to kW Calculator: Power Factor Converter | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands kVA to kW Calculator:...

Sep 19, 20268 min read
Open residential breaker panel with 240V double-pole breakers and copper feeders of different gauges
240v circuit

240V Wire Size Calculator: Breaker & Gauge Chart | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands 240V Wire Size Calculator:...

Sep 19, 20268 min read
Electrician pulling THHN copper conductors into EMT conduit on a hot commercial rooftop
ampacity derating calculator

Ampacity Derating Calculator: NEC 310.16 & Heat | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Ampacity Derating Calculator: NEC...

Sep 19, 20268 min read
Solar charge controller mounted on utility-room wall with battery bank cables
12V 24V 48V battery bank

Solar Charge Controller Sizing Calculator | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Solar Charge Controller Sizing...

Sep 19, 20268 min read
Residential rooftop solar array with series-string wiring and aluminum racking
max panels in series

Solar String Sizing: Max Panels in Series | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. 2026 product line update...

Sep 19, 20269 min read
Rooftop air-conditioning condenser unit with electrical disconnect and conduit whip
AC circuit sizing

MCA vs MOCP: AC Circuit Sizing Calculator | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands MCA vs MOCP: AC...

Sep 19, 20268 min read
Open residential breaker panel with labeled double-pole breakers and copper feeders
breaker size calculator

Breaker Size Calculator: 125% Rule & Wire Chart | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Breaker Size Calculator: The...

Sep 19, 20269 min read
Off-grid hybrid inverter with battery rack and conduit runs in a utility room
12V 24V 48V battery bank

Off-Grid Inverter Sizing: Continuous, Surge & Battery | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...

Sep 18, 20269 min read
Electrician's hand holding a circuit breaker in front of an open load center
breaker compatibility

Breaker Compatibility Chart: QO vs BR vs QP Panels | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...

Sep 18, 20268 min read
Row of residential rooftop solar panels in soft daylight, close-up on glass cells
400W vs 450W vs 500W

Solar Panel Wattage Chart: 400W vs 450W vs 500W+ | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. 2026 product line update...

Sep 18, 20268 min read
Automatic transfer switch with thick copper conductors next to breaker panel
ampacity chart

Transfer Switch Wire Sizing: Ampacity Chart by kW | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Transfer Switch Wire Sizing:...

Sep 18, 20269 min read
Torque screwdriver tightening a terminal lug on a copper conductor in a panel
breaker torque

Lug Torque Chart: NEC 110.14 Terminal Tightness by Size & Brand | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Lug Torque Chart: NEC...

Sep 18, 20268 min read
Electrical subpanel with feeder cable and neatly dressed branch circuits
feeder sizing

Subpanel Sizing Guide: Feeder Size, Spaces & Load Calc | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Subpanel Sizing Guide: Feeder...

Sep 18, 20269 min read
Residential rooftop solar installation at golden hour with installer tools nearby
calculator

Solar ROI Calculator: Payback, ITC & 25-Year Savings by State (2026) | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Solar ROI Calculator: Payback,...

Sep 18, 20268 min read
Standby generator on concrete pad with automatic transfer switch on house wall
ATS

Transfer Switch Sizing Guide: Amps, Circuits & ATS vs Manual (2026) | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Transfer Switch Sizing Guide:...

Sep 18, 20269 min read
Standby generator beside a residential propane tank and natural gas line
diesel

Standby Generator Fuel Consumption Chart: NG, Propane & Diesel | PES

Updated September 2026 — refreshed against the live PES catalog; product pricing verified 2026-09-26. PES PES Supply Editorial...

Sep 17, 20268 min read
Home battery storage wall unit in a garage powering household circuits
battery backup

Solar Battery Backup Runtime Calculator: Hours by Load & Bank Size | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Solar Battery Backup Runtime...

Sep 17, 20269 min read
Service entrance mast and meter base on a residential exterior wall
calculator

Service Entrance Cable Size Calculator: 100A/200A/400A Services | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Service Entrance Cable Size...

Sep 17, 20269 min read
Green-insulated copper grounding conductors bonded to a ground bar in a panel
EGC

Ground Wire Size Chart: NEC 250.122 EGC Sizing by Breaker Size | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Ground Wire Size Chart:...

Sep 17, 20269 min read

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