Cummins Standby Generator Authorized Distributor — Contractor Pricing
PES stocks 189 Cummins SKUs — Quiet Connect residential and C-Series commercial diesel/NG — with contractor pricing on the diesel commercial line that Generac can't match at scale.
PES Supply is an authorized online distributor for Cummins standby generators. This page is the working reference for contractors and installers who quote Cummins residential and commercial standby jobs and want distributor-tier pricing, real inventory, and OEM parts backing. We stock 189 Cummins SKUs at our Louisville, Kentucky distribution center — from air-cooled residential 13–22 kW through liquid-cooled commercial 25–200 kW — and ship to installer accounts every business day.
Cummins is the diesel commercial standby leader in North America. The lineup starts residential with the Quiet Connect QC-series (13–22 kW air-cooled) and then goes deep on the commercial side — C25 through C200 in diesel and natural gas, plus factory bi-fuel and tri-fuel on parts of the C-series. Where Generac dominates residential, Cummins dominates commercial diesel: hospitals, telco huts, small industrial, cell towers, and prime-power installations. PES stocks 189 Cummins SKUs, weighted heavily toward the C-series commercial line where Cummins' engine reputation carries the spec.
The Cummins lineup has two personalities. Quiet Connect (QC13, QC17, QC20, QC22) is the residential air-cooled line — quieter than the Generac Guardian at the same kW (56 dB(A) at 23 ft for the QC20, verifiable in Cummins spec sheets). The C-series is the commercial workhorse: C25 to C200, diesel- or NG-fueled, with genuine 24×7 prime-power ratings on parts of the range.
| Model Family | kW Range | Class | Fuel | Typical Contractor Price (Tier-1) |
|---|---|---|---|---|
| Quiet Connect QC-series | 13 – 22 kW | Residential | LP/NG dual-fuel | $5,200 – $9,800 |
| C-Series NG (C25–C60) | 25 – 60 kW | Light commercial | NG or LP | $16,500 – $28,000 |
| C-Series Diesel (C25–C60) | 25 – 60 kW | Light commercial | Diesel | $19,500 – $34,000 |
| C-Series NG (C80–C150) | 80 – 150 kW | Commercial | NG or LP | $32,000 – $58,000 |
| C-Series Diesel (C80–C150) | 80 – 150 kW | Commercial | Diesel | $38,000 – $68,000 |
| C-Series Diesel (C200) | 200 kW | Commercial/industrial | Diesel | $78,000 – $95,000 |
| C-Series Bi/Tri-Fuel | 50 – 200 kW | Critical facility | NG + Diesel | $44,000 – $110,000 |
The QC22 (22 kW Quiet Connect) is our residential volume seller — it's the direct alternative to a Generac 22 kW Guardian for customers who want the quieter unit and Cummins engine reputation. On the commercial side, the C60 D5 and C80 D5 diesel skids are our highest-turn commercial Cummins SKUs.
Standby generator demand in the United States has grown roughly 10–14% per year for the past decade, driven by an aging grid, longer average outage durations, and the electrification of heating (heat pumps) and transportation (EV chargers) that widens the gap between grid-outage impact and homeowner tolerance for it. Inside that growing market, each of the four major brands has a defensible position that contractors should recognize before they quote a job.
Cummins's share is concentrated where its structural advantages line up with customer priorities. On residential jobs, that means the customer profile, the fuel available, and the willingness to pay a premium (or press for a discount) tilt each spec toward one brand over another. On commercial jobs, the tilt is mostly about who the specifier is and what reads well on their procurement committee's spec sheet.
Contractor rules of thumb for when Cummins is the right pick
- Light-commercial job (30–150 kW) where the specifier is comfortable with the Cummins diesel heritage and expects premium-tier engine reliability.
- Rural or agricultural residential with an existing propane tank and a customer who wants a premium brand and doesn't blink at a 10–15% price premium.
- Job with a strong quiet-operation requirement in a residential zone — the Quiet Connect line is engineered specifically for the low-dBA residential HOA context.
- Commercial or industrial spec-sheet job where the specifier writes 'Cummins or equal' — dropping the 'or equal' language gets the contractor a straight-line quote.
- Existing Cummins field-service relationship the customer wants to preserve for warranty and after-sales support consistency.
- Data-center, healthcare, or telecom job at 100–600 kW where the Cummins C-series or QSB engine is the pre-approved standard.
Cummins Quiet Connect residential units ship LP/NG dual-fuel like Generac Guardian — the installer sets the fuel at commissioning. The commercial C-series is fuel-committed at factory build: you order the C60 as either a C60N (natural gas), C60D (diesel), or C60F (bi-fuel). Diesel is the Cummins commercial default because the engine platform (QSB-series) is a proven Cummins truck engine derivative with excellent parts availability.
| Generator | Fuel Options | kW De-rate (NG vs LP) | Recommended Transfer Switch | Notes |
|---|---|---|---|---|
| QC13 (13 kW) | LP/NG | 11 kW on NG | Cummins RA100 (100A) or RA200 (200A) | Small whole-home |
| QC17 (17 kW) | LP/NG | 15 kW on NG | Cummins RA200 (200A) | Whole-home 2,500–3,000 sq ft |
| QC20 (20 kW) | LP/NG | 18 kW on NG | Cummins RA200 (200A SE) | Whole-home volume |
| QC22 (22 kW) | LP/NG | 20 kW on NG | Cummins RA200 (200A SE) | Top of residential QC |
| C25 D5 (25 kW diesel) | Diesel | N/A | Cummins RA400 (400A) | Light commercial |
| C40 N6 (40 kW NG) | NG or LP | Rated NG | Cummins RA400 | Light commercial |
| C60 D5 (60 kW diesel) | Diesel | N/A | 400A ATS | Commercial workhorse |
| C80 D5 (80 kW diesel) | Diesel | N/A | 400A ATS with load management | Commercial |
| C100 D6 (100 kW diesel) | Diesel | N/A | 600A ATS | Commercial |
| C150 D6 (150 kW diesel) | Diesel | N/A | 800A ATS | Commercial/industrial |
| C200 D6 (200 kW diesel) | Diesel | N/A | 1200A ATS | Industrial / prime power |
Bi-fuel Cummins units start diesel (guaranteed cold-start) and blend NG as the load stabilizes — the result is diesel runtime with 60–70% less diesel consumption. That is the Cummins pitch for critical facilities that need long runtime (hospitals during an ice storm) without an oversized diesel tank.
Common Cummins residential kit configurations
- 22 kW Quiet Connect LP whole-home: Cummins QC22 + RA200 200A SE ATS + 500-gal LP tank + composite pad.
- 60 kW commercial diesel: Cummins C60 D5 + 400A ATS + engineered concrete pad + 150-gal sub-base diesel tank.
- 100 kW commercial NG: Cummins C100 N6 + 600A ATS + engineered pad + 1½″ NG line + regulator upsize.
- 150 kW hospital bi-fuel: Cummins C150 F6 + 800A ATS with paralleling + engineered pad + 24 hr diesel sub-base + NG tie-in.
- 200 kW industrial prime: Cummins C200 D6 + 1200A ATS + engineered pad + 500-gal sub-base diesel tank.
| Application | Recommended Cummins Model | Fuel | Transfer Switch |
|---|---|---|---|
| Whole-home, 2,500–3,500 sq ft | QC20 (20 kW) | LP or NG | RA200 200A SE |
| Whole-home, 3,500–4,500 sq ft, single AC | QC22 (22 kW) | LP or NG | RA200 200A SE |
| Small clinic / veterinary | C25–C40 diesel or NG | Diesel or NG | 400A ATS |
| Small hospital / imaging center | C60–C80 diesel | Diesel | 400A ATS |
| Mid-size hospital / school | C100–C150 diesel | Diesel or bi-fuel | 600–800A ATS |
| Telco hut / cell tower prime | C40–C80 diesel prime-rated | Diesel | Manual or ATS |
| Data center standby | C150–C200 diesel + paralleling | Diesel | 1200A ATS |
Cummins earns its commercial spec on engine reputation. The C-series diesel platform is a Cummins QSB-derivative truck engine — same block family, same parts network. Hospitals and telco specifiers who see 'Cummins' on a spec sheet know the engine will run at 60% load 24×7 for a decade because Cummins truck engines already do exactly that.
Cummins Quiet Connect residential carries a 5-year / 2,000-hour limited warranty (parts, no factory labor). Commercial C-series carries a 2-year full / 5-year standby limited warranty, and prime-power ratings extend the warranty proportionally. Warranty flows through Cummins' PowerSuite dealer portal — PES registers each unit against the end-user address at invoice.
| Line | Warranty Term | Labor Coverage | OEM Parts Coverage |
|---|---|---|---|
| Quiet Connect QC residential | 5 yr / 2,000 hr limited | Parts only | 5 yr parts |
| C-Series standby (light comm.) | 2 yr full / 5 yr standby | Yr 1 full | 5 yr parts, 2 yr full |
| C-Series commercial | 2 yr full / 5 yr standby | Yr 1 full | 5 yr parts, 2 yr full |
| C-Series prime power | 1 yr / 1,000 hr full | Yr 1 full | 1 yr parts + hours |
⚠ Warranty registration is not automatic on grey-market channels
Every Cummins unit sold through PES is warranty-registered against the end-user address through the OEM portal on invoice. Units sold through unauthorized channels do not carry the standby 5-year warranty automatically — the OEM will not honor a claim without proof of authorized-channel sale. Confirm the distributor is on the OEM's authorized list before you buy.
Cummins' commercial diesel dominance is where it beats the other three brands. On residential, Quiet Connect is competitive but the Generac Guardian ecosystem is larger. Feature matrix:
| Dimension | Cummins | Generac | Briggs & Stratton | Kohler |
|---|---|---|---|---|
| Residential SKUs at PES | Mid (Quiet Connect) | Highest | Mid-high | Lowest |
| Air-cooled kW ceiling | 22 kW | 26 kW | 26 kW | 26 kW |
| Commercial diesel breadth | Deepest (C25–C200) | Yes (Industrial SD) | Yes (Fortress diesel) | Yes (REOZK) |
| Prime-power ratings | Yes (C-series) | Limited | Limited | Yes (REOZK) |
| Bi-fuel factory option | Yes (C50–C200) | Limited | No | Limited |
| Engine reputation (commercial) | Highest | Own-built | Own-built + Vanguard | Yanmar / KDI / KOHLER |
| Residential quiet operation | 56 dB @ 23 ft | 60 dB @ 23 ft | 62 dB @ 23 ft | 60 dB @ 23 ft |
Every standby generator becomes a parts customer the day it's commissioned. Air-cooled units consume oil filters, air filters, spark plugs, and batteries; liquid-cooled units consume the same list plus coolant, coolant hoses, and the occasional control-board revision. PES stocks the OEM part numbers under the same freight terms as the units — same tier discounts, same next-business-day shipping from Louisville. Serial-traceable part numbers pass Cummins warranty audit; grey-market 'compatible' aftermarket parts do not.
Cummins service parts stocked at PES (short list)
- OEM filter kits (oil, air, and fuel) matched to every stocked Cummins residential and commercial SKU.
- OEM batteries (Group 26 to Group 31) for Cummins standby generator battery replacement.
- OEM control-panel components — controllers, wiring harnesses, and display modules for Cummins standby lines.
- OEM enclosure hardware — fasteners, gaskets, and access panels stocked for Cummins residential units.
- OEM coolant and coolant additive per Cummins liquid-cooled specifications (long-life or standard).
- Transfer-switch replacement contactors, coils, and control cards for Cummins-branded ATS models.
On multi-unit residential installer accounts, PES bundles a starter parts kit with the initial generator purchase order — filters, spark plugs, and oil for the first three annual services on each unit. That single line item saves the installer the pain of re-ordering three months later when the first service call comes due.
These seven steps are the sequence PES account reps walk through with contractors when a new job comes in. Follow them and the quote comes out tight the first time.
Classify the application first
Cummins is spec'd differently for residential versus commercial. Residential = Quiet Connect QC. Small commercial = C25–C60. Hospital / prime power = C80+. The class decision cascades into fuel, warranty, transfer switch, and pad choice.
For residential: size against LP/NG derate
Sum continuous watts + largest motor-start surge. Multiply peak by 1.10 for NG derate. Pick QC13, QC17, QC20, or QC22 — one step above the sized kW. Cummins QC22 is the residential ceiling; anything above crosses to C25 diesel or C40 NG commercial.
For commercial: commit to fuel at spec time
Cummins C-series is fuel-committed at factory build. Diesel commercial is the default for hospital, cell tower, prime power. NG is the default for suburban commercial where utility gas is reliable. Bi-fuel is spec'd only when both cold-start guaranteed and long runtime are critical.
Match the transfer switch to service amperage
Residential 200A panel → Cummins RA200. Commercial 400A service → Cummins RA400 with load-side monitoring. Above 400A → third-party paralleling switchgear from ASCO, Eaton, or Cummins PCC-series controllers.
Verify diesel sub-base tank runtime
Commercial diesel C-series uses a UL-listed sub-base tank sized to the runtime the customer requires. Rule of thumb: 24 hours at 60% load. For a C60 at 60% load, that's about 3.6 gal/hr × 24 hr = 86 gal → spec a 100-gal sub-base minimum.
Engineer the pad for liquid-cooled skids
Cummins C-series liquid-cooled skids need engineered concrete pads with rebar and adequate cure time. C60 pad is ~7 ft × 4 ft × 6 in reinforced. C150 pad is 10 ft × 5 ft × 8 in with 4 ft clearance all sides. Coordinate with the site's structural engineer or PES's spec team.
Bundle the quote and register the warranty
Commercial C-series bundles include the generator, ATS, control panel options, and freight — bundled pricing runs 4–7% below line-item pricing. PES pushes warranty registration through Cummins PowerSuite dealer portal at invoice; customer receives the certificate after commissioning.
Is PES an authorized Cummins distributor?
Yes. PES holds an active Cummins Power Systems distribution agreement. Warranty registration for Cummins units sold through PES flows through Cummins' PowerSuite dealer portal, and OEM parts ship with serial-traceable part numbers.
What is the Cummins Quiet Connect line?
Quiet Connect is Cummins' residential air-cooled standby line — QC13, QC17, QC20, and QC22. It ranges from 13 kW to 22 kW and is the direct competitor to Generac's Guardian residential line. The QC20 measures 56 dB(A) at 23 feet, quieter than most competing units at the same kW.
How does Cummins compare to Generac on residential?
Cummins Quiet Connect competes with Generac Guardian at 13–22 kW. Cummins is typically quieter (56 dB vs 60 dB at 23 ft for the 20 kW class), and the engine has a Cummins-branded reputation. Generac has a larger residential dealer network and tighter kW spacing (Generac offers 18, 20, 22, 24, and 26 kW; Cummins Quiet Connect tops out at 22 kW). Pricing is competitive at the 20–22 kW level.
What's the biggest Cummins standby unit PES stocks?
PES stocks the Cummins C200 D6 (200 kW diesel) as the flagship commercial standby. Above that (250–2,000 kW), Cummins builds to spec at the factory with 4–8 week lead times; PES quotes those as project orders through the Cummins dealer channel.
What's a bi-fuel Cummins generator?
Bi-fuel is a Cummins commercial option that blends natural gas with diesel while running. The unit cold-starts on diesel (guaranteed ignition), then blends in NG as the load stabilizes. Result: diesel-like runtime reliability with 60–70% less diesel consumption. Popular in hospitals and critical facilities during ice storms where NG service might fail but diesel-only would burn through the sub-base tank.
Do all Cummins C-series units come with a transfer switch?
No. The generator ships as a genset; the transfer switch is a separate SKU. Cummins offers the RA-series (RA100, RA200, RA400) automatic transfer switches; PES stocks these alongside third-party ASCO and Eaton switches for larger applications. Ask your account rep to bundle the ATS with the generator quote.
What's the runtime on a Cummins C60 diesel?
At 60% load (the standby duty cycle), a Cummins C60 D5 burns approximately 3.6 gal/hr of #2 diesel. With a 100-gal UL-listed sub-base tank, that gives ~27 hours of continuous runtime. Larger sub-base tanks (200 gal, 500 gal) are available for longer runtime specs — up to 72+ hours on a 500-gal sub-base.
Does Cummins offer a prime-power warranty?
Yes. Cummins C-series commercial units are available in either standby-only or prime-power ratings. Prime-power carries a 1-year / 1,000-hour full warranty (parts + labor). Standby carries 2-year full / 5-year limited. Prime-power specs are common for cell towers, off-grid remote sites, and construction generators.
What transfer switch pairs with the Cummins QC22?
For whole-home coverage on a 200A residential service panel, the Cummins RA200 (200A service-entrance automatic transfer switch) is the standard pairing. For essential-circuits configurations, use the RA100 (100A ATS) plus load management. PES stocks both.
How long is the lead time on a stocked C60 diesel?
Stocked C25–C60 commercial diesels typically ship within 5 business days from Louisville. Freight LTL to the lower 48 runs 4–7 business days. Larger units (C80–C200) are stocked selectively; verify with your account rep before quoting a fixed lead time to your customer.
Does PES stock Cummins OEM parts?
Yes. PES stocks Cummins Fleetguard filters (LF3970, FF5052, FS1006), Cummins-branded coolant, control-panel components, and PCC (Power Command Controller) parts for the C-series. Genuine Cummins parts ship serial-traceable and pass warranty audit.
Can PES quote Cummins generators for federal or municipal contracts?
Yes. PES supports government tax-exempt sales, GSA schedule pricing where applicable, and DBE / MBE requirements. Cummins is on the GSA schedule for many C-series configurations. Upload tax-exempt certificates during account setup.
Standby generators do not fail from age. They fail from missed service. Every one of the four brands specifies an annual service that keeps the warranty in force and the unit ready to start on the first outage of the year. Cummins residential air-cooled service is roughly the same across the lineup: change the oil and filter, check air filter, replace the spark plugs at year 2 and every 2 years after, load-test the battery, exercise the unit under full load, and inspect the enclosure and gas line. Liquid-cooled commercial units add coolant checks, coolant additive replenishment, and belt/hose inspection.
Cummins standard annual service kit (residential air-cooled)
- Oil change with OEM-spec 5W-30 synthetic (roughly 1.7 qt for air-cooled; 5–8 qt for liquid-cooled per model).
- Oil filter replacement — OEM part number matched to the Cummins SKU.
- Air filter inspection — replace at year 2 or after any major dust event.
- Spark plug replacement at year 2 and every 2 years after (air-cooled only).
- Battery load test — replace at year 4 or on any weak-start indication.
- Full-load exercise cycle — verify frequency stability, voltage regulation, transfer to load and back.
- Gas-line leak check with soap solution at every connection between meter and generator.
PES bundles the annual service kit as a stocked SKU so the installer's service tech shows up with everything on the truck. On multi-unit installer accounts, PES ships service kits on an annual cadence tied to install anniversary dates — the installer's back office doesn't have to re-order per-unit.
Open a contractor account with PES Supply
Get pallet-quantity pricing, tier discounts, and drop-ship freight on Generac, Cummins, Briggs & Stratton, and Kohler standby generators — plus access to the interactive sizing, voltage-drop, wire-sizing, and freight calculators on the PES contractor portal.
Register for contractor pricing →Registered contractors — access the interactive calculators on the PES contractor portal
- Generator Sizing Calculator — spec kW, ATS, fuel line, and pad in one screen
- Voltage Drop Calculator — NEC 210.19(A) informational note conductor sizing
- Wire Sizing Calculator — NEC 310.16 ampacity with derating
- Freight Calculator — pallet-quantity freight quotes 48 states
