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Technical guides, product reviews, code updates, and industry news for installers, EPCs, and project managers
LADWP and Investor-Owned Utility RFPs - A Bidder's Guide for Electrical and Renewable Equipment Supply
LADWP and Investor-Owned Utility RFPs -A Bidder's Guide for Electrical and Renewable Equipment Supply Responding to Los Angeles Department of Water and Power, Southern California Edison, PG&E, ConEd, Duke, TVA, and other...
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Federal Contractor Buy-American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equip...
Federal Contractor Buy - American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equipment How...
State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO ValuePoint
State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO A working guide to the four...
Federal Solar RFP Response Template Library - Section L/M Compliance, Past Performance, and Bid Package Structure
Federal Solar RFP Response Template Library - SF-33 to Past Performance to BABA Cert Every federal solar solicitation...
GSA Schedule Roadmap for Electrical and Solar Suppliers - Multiple Award Schedule Application, Award, and Task Order ...
GSA Schedule Roadmap for Electrical + Solar Distributors and the Contractors Who Sell Through Them A distributor-perspective walkthrough...
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...
HVAC Contractor Pallet Freight and LTL Guide: Hazmat Routing, DOT Compliance, and Landed Cost Economics
How refrigerant and HVAC parts actually move through the freight network -- and how contractors cut $1,500-4,000 per...
Commercial HVAC Refrigerant Compliance for Facility Managers: 40 CFR Part 82, Leak Repair Thresholds, and Penalty Avo...
A facility manager's operating manual for EPA Section 608 compliance -- recordkeeping, leak-repair triggers, and the audit trail...
HVAC Service Tools Brand Selector: Fieldpiece vs Testo vs Fluke Digital Manifolds, Gauges, and Leak Detectors
Which digital-manifold ecosystem earns its price, which brand your senior techs will actually use, and how to standardize...
Refrigerant Recovery Equipment Buying Guide: Bacharach vs CPS vs Fieldpiece vs Yellow Jacket vs Appion
Which recovery machine actually pays for itself, which is A2L-ready for R-454B, and how to think about recovery-machine...
PES Refrigerant Subscription Program: Recurring Pallet Delivery for HVAC Contractors
Quarterly pallet delivery, locked contractor pricing, priority hazmat routing, and cash-flow-friendly cylinder deposits.
EPA 608 Certification Guide: Type I, II, III, and Universal Testing Paths for HVAC Contractors
Which cert type your techs actually need, how to test, what it costs, and how to think about...
R-454B Transition Guide for HVAC Contractors: 2025 AIM Act, R-410A Phasedown, and Equipment Retrofits
The A2L refrigerant reshaping residential and light commercial HVAC -- what changes on your service truck, in your...
HVAC Contractor Refrigerant Buying Guide: R-410A, R-134a, R-22 Bulk Pricing & Hazmat Shipping
EPA 608 cert gate, DOT hazmat routing, and pallet-tier contractor pricing for the four refrigerants that actually still...
EPA Section 608 Certification: Complete Study Guide (Type I, II, III & Universal)
Free EPA 608 certification study guide. Type I, II, III, and Universal exam prep, 22 practice questions, refrigerant...
R-410A Phase-Down 2026: What HVAC Contractors Need to Know
Last updated: August 2026. This guide is for HVAC contractors, mechanical engineers, and refrigerant buyers working through the...
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...
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...
Solar + Battery Storage: The Complete 2026 Guide for Homeowners
Last Updated: August 2026 • Home Solar, Battery Backup & Energy Independence Guide Residential solar has changed. A...
ITC Safe Harbor & Commence-Construction: What Solar Buyers Must Lock Before the Residential Credit Sunset
The rules governing federal solar tax credits changed more between July 2025 and July 2026 than in the...
Section 232 Solar Tariffs & Minimum Import Prices: The December 4, 2026 Deadline — What Module, Cell & Polysilicon Bu...
Introduction: A 120-Day Countdown Begins Axitec AU12641 400W MBT Solar Panel - AC-400MH/108V$157.98 View Rec Solar TwinPeak 2S...
How to Size Circuit Breakers: NEC 125% Rule (2026)
Learn how to size circuit breakers correctly with the NEC 125% rule. Step-by-step calculator for safe, compliant breaker...
Solar Module Sourcing in 2026: Regional Costs, Tariff Stacking, and the Domestic Content Math
Where solar modules are made in 2026, what they actually cost by region, how tariffs stack, and when...
Module Prices Hit $0.34/W — So Why Did Your Commercial Quote Go Up?
Solar module prices dropped to $0.34/W in Q1 2026, but commercial system prices rose 4%. The real story...
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LADWP and Investor-Owned Utility RFPs - A Bidder's Guide for Electrical and Renewable Equipment Supply
LADWP and Investor-Owned Utility RFPs -A Bidder's Guide for Electrical and Renewable Equipment Supply Responding to Los Angeles Department of Water and Power, Southern California Edison, PG&E, ConEd, Duke, TVA,...
LADWP and Investor-Owned Utility RFPs - A Bidder's Guide for Electrical and Renewable Equipment Supply
LADWP and Investor-Owned Utility RFPs -A Bidder's Guide for Electrical and Renewable Equipment Supply Responding to Los Angeles Department of Water and Power, Southern California Edison, PG&E, ConEd, Duke, TVA,...
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Federal Contractor Buy-American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equip...
Federal Contractor Buy - American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equipment How Buy American Act (FAR 52.225-1) applies to electrical distribution equipment, solar modules,...
Federal Contractor Buy-American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equip...
Federal Contractor Buy - American Electrical Requirements - FAR 52.225 Compliance for Electrical, Solar, and Grid Equipment How Buy American Act (FAR 52.225-1) applies to electrical distribution equipment, solar modules,...
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State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO ValuePoint
State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO A working guide to the four cooperative purchasing programs that dominate state and local electrical procurement - Sourcewell,...
State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO ValuePoint
State Cooperative Purchasing Programs for Electrical Equipment - Sourcewell, OMNIA, TIPS, NASPO A working guide to the four cooperative purchasing programs that dominate state and local electrical procurement - Sourcewell,...
