PES Supply Newsroom
Technical guides, product reviews, code updates, and industry news for installers, EPCs, and project managers
Voltage Drop Calculator: NEC 3%/5% Rule, Formula & Wire Size Charts
Interactive voltage drop calculator with NEC 3%/5% guidance. Single-phase and three-phase, copper and aluminum, with circular-mil tables, worked examples, and max-run charts.
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Solar
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BABA Compliance for Electrical and Solar Equipment - 2 CFR 184, the 55% Rule, and How to Source Compliant Product
BABA Build America Buy America Compliance Guide for Electrical & Solar Equipment A distributor's field manual for infrastructure...
Batteries & Storage
View all Batteries & Storage →New batteries & storage coverage is in the works — browse all batteries & storage articles →
Generators
View all Generators →New generators coverage is in the works — browse all generators articles →
Electrical & Code
View all Electrical & Code →
Voltage Drop Calculator: NEC 3%/5% Rule, Formula & Wire Size Charts
Interactive voltage drop calculator with NEC 3%/5% guidance. Single-phase and three-phase, copper and aluminum, with circular-mil tables, worked...
EV Charger Circuit Calculator: Breaker & Wire Size per NEC 625 (125% Rule)
Interactive EV charger circuit calculator: charger amps to breaker and wire size under the NEC 625 125% continuous-load...
Service Entrance Load Calculator: NEC 220 Standard Method (Sq Ft + Appliances + HVAC)
Interactive NEC Article 220 standard-method load calculator: square footage, appliances, range, dryer, HVAC, and EV charging in —...
Conduit Bending Calculator: Offset Multiplier & Shrinkage Math (10°/22.5°/30°/45°)
Interactive conduit offset bending calculator: multiplier, shrinkage, and mark spacing for 10°, 22.5°, 30°, and 45° bends —...
HVAC
View all HVAC →
Service Entrance Load Calculator: NEC 220 Standard Method (Sq Ft + Appliances + HVAC)
Interactive NEC Article 220 standard-method load calculator: square footage, appliances, range, dryer, HVAC, and EV charging in —...
Industry Desk
View all Industry Desk →
BABA Compliance for Electrical and Solar Equipment - 2 CFR 184, the 55% Rule, and How to Source Compliant Product
BABA Build America Buy America Compliance Guide for Electrical & Solar Equipment A distributor's field manual for infrastructure...
The Latest
EV Charger Circuit Calculator: Breaker & Wire Size per NEC 625 (125% Rule)
Interactive EV charger circuit calculator: charger amps to breaker and wire size under the NEC 625 125% continuous-load...
Service Entrance Load Calculator: NEC 220 Standard Method (Sq Ft + Appliances + HVAC)
Interactive NEC Article 220 standard-method load calculator: square footage, appliances, range, dryer, HVAC, and EV charging in —...
Conduit Bending Calculator: Offset Multiplier & Shrinkage Math (10°/22.5°/30°/45°)
Interactive conduit offset bending calculator: multiplier, shrinkage, and mark spacing for 10°, 22.5°, 30°, and 45° bends —...
BABA Compliance for Electrical and Solar Equipment - 2 CFR 184, the 55% Rule, and How to Source Compliant Product
BABA Build America Buy America Compliance Guide for Electrical & Solar Equipment A distributor's field manual for infrastructure...
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Solar Panels Generators Batteries EV Chargers Circuit Breakers Charge Controllers Commercial SolarBlog posts
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Solar Panels + EV Charging: How to Build an Energy-Efficient Home
Last Updated: August 2026 • A Practical Guide for Homeowners Combining Solar and EV Charging An electric vehicle is, from a home electrical standpoint, one of the largest single loads...
Solar Panels + EV Charging: How to Build an Energy-Efficient Home
Last Updated: August 2026 • A Practical Guide for Homeowners Combining Solar and EV Charging An electric vehicle is, from a home electrical standpoint, one of the largest single loads...
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Solar Panel Wholesale Pricing: What Installers Should Know in 2026
Last Updated: August 2026 • A Procurement Guide for Installers, EPCs, and Contractors Panel pricing is rarely the line item installers get wrong on a bid — it's usually the...
Solar Panel Wholesale Pricing: What Installers Should Know in 2026
Last Updated: August 2026 • A Procurement Guide for Installers, EPCs, and Contractors Panel pricing is rarely the line item installers get wrong on a bid — it's usually the...
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Solar Microgrids: How Communities Can Build More Resilient Energy Systems
Last Updated: August 2026 • A Practical Overview for Municipalities, Campuses, and Community Organizers A single home with solar and a battery can keep the lights on during an outage....
Solar Microgrids: How Communities Can Build More Resilient Energy Systems
Last Updated: August 2026 • A Practical Overview for Municipalities, Campuses, and Community Organizers A single home with solar and a battery can keep the lights on during an outage....
