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Technical guides, product reviews, code updates, and industry news for installers, EPCs, and project managers

Generac 22kW vs Kohler 20kW Standby Generator: Real Specs
Featured ·brand guides

Generac 22kW vs Kohler 20kW Standby Generator: Real Specs

Generac Guardian 22kW vs Kohler 20RCAL 20kW: real specs, warranty, noise, ATS bundles, and live prices — verified October 19, 2026.

Oct 19, 2026 · 4 min read Read the featured article →

Solar

View all Solar →
Best Solar Panels for Cloudy Climates: What Actually Matters
Solar

Best Solar Panels for Cloudy Climates: What Actually Matters

Cloud cover doesn't kill solar economics — but panel choice matters more. Efficiency, low-light behavior, and temperature coefficient...

Oct 02, 20263 min read
Pallet of boxed solar panels in shrink wrap on a warehouse floor with a liftgate box truck behind
Solar

Solar Panel Pallet Cost, Delivered: $/W Math | PES

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

Sep 23, 20269 min read
Commercial flat-roof solar array with copper grounding lugs bonding aluminum racking rails
Solar

Commercial Solar Grounding BOM: NEC 690.43 | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Commercial Solar Grounding BOM:...

Sep 23, 20268 min read
All-black solar panels on a residential shingle rooftop in late afternoon sunlight
Solar

Aptos DNA 460W Panel: Specs, Price & Family | PES

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

Sep 23, 20268 min read

Batteries & Storage

View all Batteries & Storage →
Wall-mounted hybrid solar inverter in a tidy residential utility room with metal conduit, red and black battery cables and a subpanel
Batteries & Storage

Sol-Ark vs GoodWe Hybrid Inverter Guide | PES

Updated September 2026 — content reviewed and refreshed by the PES team. For current pricing and availability, see...

Sep 23, 20268 min read
Two modern wall-mounted home battery storage units side by side on a clean residential garage wall with conduit and a disconnect
Batteries & Storage

EG4 Battery vs Tesla Powerwall 3: Honest Comparison | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands EG4 Battery vs Tesla...

Sep 23, 20268 min read
Caribbean-style home in Puerto Rico with a rooftop solar array and a wall-mounted home battery, palm trees and bright sun
Batteries & Storage

Puerto Rico Solar + Battery Resilience Guide | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Puerto Rico Solar +...

Sep 23, 20269 min read
Floor-standing home battery storage cabinet beside a wall-mounted hybrid inverter in a residential garage
Batteries & Storage

Big Battery NEXUS 15kWh Explained: Specs & Scaling | PES

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

Sep 23, 20268 min read

Generators

View all Generators →
Generac 22kW vs Kohler 20kW Standby Generator: Real Specs
Generators

Generac 22kW vs Kohler 20kW Standby Generator: Real Specs

Generac Guardian 22kW vs Kohler 20RCAL 20kW: real specs, warranty, noise, ATS bundles, and live prices — verified...

Oct 19, 20264 min read
Residential standby generator on a concrete pad beside a brick home with conduit to a wall-mounted transfer switch
Generators

Briggs PowerProtect 13kW Shell + Symphony II ATS | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Briggs & Stratton PowerProtect...

Sep 23, 20268 min read
Residential standby generator on a composite pad beside a suburban home with an electrician work van in the driveway
Generators

Champion aXis Generator Guide: 8.5kW, 14kW & 22kW | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Champion aXis Generator Guide:...

Sep 23, 20268 min read
Air-cooled home standby generator on a composite pad with electrician connecting the fuel line
Generators

Generac 7042 & 7172 Explained: /817 and /997 Shells | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Generac 7042 & 7172...

Sep 22, 20268 min read

Electrical & Code

View all Electrical & Code →
Commercial flat-roof solar array with copper grounding lugs bonding aluminum racking rails
Electrical & Code

Commercial Solar Grounding BOM: NEC 690.43 | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Commercial Solar Grounding BOM:...

Sep 23, 20268 min read
Electric unit heater mounted high on the wall of a residential garage workshop with metal conduit
Electrical & Code

Solar Garage Heater Sizing Calculator | PES

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

Sep 20, 20269 min read
Residential standby generator on a concrete pad beside a house at dusk with interior lights on
Electrical & Code

What Can a Generator Run? kW Load Calculator | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands What Can a Generator...

Sep 20, 20269 min read
Residential electric meter on an exterior wall beside the service entrance conduit of a suburban home
Electrical & Code

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

HVAC

View all HVAC →
Through-the-wall PTAC air conditioner installed on a hotel guestroom wall beneath a large window
HVAC

Amana PTAC Sizing Guide: 7,000–15,000 BTU Ladder | PES

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

Sep 23, 20268 min read
Galvanized round HVAC ducts and flex duct branching across a residential attic with foil insulation
HVAC

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

Industry Desk

View all Industry Desk →
Residential rooftop solar installation at golden hour with installer tools nearby
Industry Desk

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

The Latest

Best Solar Panels for Cloudy Climates: What Actually Matters
bifacial

Best Solar Panels for Cloudy Climates: What Actually Matters

Cloud cover doesn't kill solar economics — but panel choice matters more. Efficiency, low-light behavior, and temperature coefficient...

Oct 02, 20263 min read
Pallet of boxed solar panels in shrink wrap on a warehouse floor with a liftgate box truck behind
landed cost per watt

Solar Panel Pallet Cost, Delivered: $/W Math | PES

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

Sep 23, 20269 min read
Commercial flat-roof solar array with copper grounding lugs bonding aluminum racking rails
commercial solar grounding

Commercial Solar Grounding BOM: NEC 690.43 | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Commercial Solar Grounding BOM:...

Sep 23, 20268 min read
All-black solar panels on a residential shingle rooftop in late afternoon sunlight
460w solar panel

Aptos DNA 460W Panel: Specs, Price & Family | PES

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

Sep 23, 20268 min read
Residential standby generator on a concrete pad beside a brick home with conduit to a wall-mounted transfer switch
040745

Briggs PowerProtect 13kW Shell + Symphony II ATS | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Briggs & Stratton PowerProtect...

Sep 23, 20268 min read
Full wooden pallet stacked with boxed solar panels in shrink film on a warehouse floor with a flatbed liftgate truck behind
bulk solar panels

Buying Solar Panels by the Pallet: Pro Guide | PES

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

Sep 23, 20268 min read
Wall-mounted hybrid solar inverter in a tidy residential utility room with metal conduit, red and black battery cables and a subpanel
15k-2p

Sol-Ark vs GoodWe Hybrid Inverter Guide | PES

Updated September 2026 — content reviewed and refreshed by the PES team. For current pricing and availability, see...

Sep 23, 20268 min read
Two modern wall-mounted home battery storage units side by side on a clean residential garage wall with conduit and a disconnect
48v battery

EG4 Battery vs Tesla Powerwall 3: Honest Comparison | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands EG4 Battery vs Tesla...

Sep 23, 20268 min read
Caribbean-style home in Puerto Rico with a rooftop solar array and a wall-mounted home battery, palm trees and bright sun
cbes battery program

Puerto Rico Solar + Battery Resilience Guide | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Puerto Rico Solar +...

Sep 23, 20269 min read
All-black residential rooftop solar panels with a uniform busbar-free surface on a shingle roof
abc solar panel

AIKO Solar Panels: Price, Specs & ABC Technology | PES

Updated September 2026 — content reviewed and refreshed by the PES team. For current pricing and availability, see...

Sep 23, 20269 min read
Commercial ground-mount bifacial solar array on light gravel under a clear sky
bifacial solar panel

Bila Solar AA-530US: Domestic Content Panels & ITC | PES

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

Sep 23, 20269 min read
Gloved hand clamping a split-core current transformer around a conductor inside an open electrical panel
accu-ct

Accu-CT Split-Core Sensors Explained: 333mV CTs | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Accu-CT Split-Core Sensors Explained:...

Sep 23, 20268 min read
Floor-standing home battery storage cabinet beside a wall-mounted hybrid inverter in a residential garage
48v battery

Big Battery NEXUS 15kWh Explained: Specs & Scaling | PES

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

Sep 23, 20268 min read
Through-the-wall PTAC air conditioner installed on a hotel guestroom wall beneath a large window
amana ptac

Amana PTAC Sizing Guide: 7,000–15,000 BTU Ladder | PES

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

Sep 23, 20268 min read
Residential standby generator on a composite pad beside a suburban home with an electrician work van in the driveway
axis

Champion aXis Generator Guide: 8.5kW, 14kW & 22kW | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Champion aXis Generator Guide:...

Sep 23, 20268 min read
Air-cooled home standby generator on a composite pad with electrician connecting the fuel line
7042

Generac 7042 & 7172 Explained: /817 and /997 Shells | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Generac 7042 & 7172...

Sep 22, 20268 min read
Modular home battery stack with inverter head and subpanel in a utility room
bluetti

Bluetti Buying Guide: AC180P vs AC200PL vs EP900 | PES

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

Sep 22, 20267 min read
All-black residential solar panels on a shingle rooftop at low afternoon sun
445w

Canadian Solar 445W vs 435W: TOPHiKu6 Model Guide | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands Canadian Solar 445W vs...

Sep 22, 20267 min read
Portable power station with expansion battery and folding solar panel in a residential garage
anker solix

Anker SOLIX Buying Guide: C2000 Gen 2 vs F3800 vs E10 | PES

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

Sep 22, 20268 min read
Electric unit heater mounted high on the wall of a residential garage workshop with metal conduit
btu per square foot garage

Solar Garage Heater Sizing Calculator | PES

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

Sep 20, 20269 min read
Electrician testing a 240V receptacle with a digital multimeter in a workshop with panel behind
3 phase amps

kWh to Amps Calculator: 120V, 240V & 3-Phase | PES

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

Sep 20, 20268 min read
Home battery storage unit wall-mounted in a garage charging from rooftop solar with hybrid inverter
200w solar panel 100ah battery

Solar Battery Charge Time Calculator | PES

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

Sep 20, 20268 min read
Residential standby generator on a concrete pad beside a house at dusk with interior lights on
22kw generator capacity

What Can a Generator Run? kW Load Calculator | PES

PES PES Supply Editorial Team Trade expertise from 50,000+ SKUs and 169 authorized brands What Can a Generator...

Sep 20, 20269 min read

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