Cummins C20D6 — Enclosed + 24-Hour Tank
Liquid-cooled · Diesel
24hr tank
Equipment from
$21,413.12
Equipment only. Installation quoted after a free site survey.
View detailsLight Commercial Diesel (enclosed)
Cummins C20D6 — 20kW Diesel Generator, Enclosed
20kW liquid-cooled standby generator, Diesel. Small businesses that need dependable standby power and want fuel they control on site.
Representative manufacturer image of the range. Enclosure finish, color and dimensions vary by model and configuration — see the specifications below for this unit.
20 kW Diesel Liquid-cooled no tank Sound Level 1 enclosure
The C20D6 is a diesel standby set in a Sound Level 1 enclosure. It weighs 1091 lb and measures 72 x 34 x 45.5 inches.
This configuration ships without a tank. You will need either a base tank or a day-tank-and-bulk arrangement; we size that during the survey against your required runtime.
Diesel gives you the highest power density and fuel you can store on site, independent of the gas utility - the usual choice when the load is large, the runtime requirement is fixed, or code requires on-site fuel.
Equipment price
$18,356.15
Equipment only — installation quoted separately
The C20D6 is sold by UTS ElectricPros, an authorized Cummins dealer in Dallas–Fort Worth. Buying through an authorized dealer is what keeps the manufacturer warranty valid — equipment bought from an unauthorized reseller frequently is not covered, and owners tend to find that out at the worst possible moment.
A separate service
Want us to install it?
Installation is not included in the price above and is not sold at checkout. It is quoted on its own, in writing, after a free on-site survey. You are welcome to buy the equipment here and use your own electrician.
- ✓ Concrete or composite pad
- ✓ Fuel supply: base tank or day tank arrangement
- ✓ Transfer switch and electrical tie-in
- ✓ Permit and city inspection
- ✓ Startup, load test and walkthrough
Prefer to talk it through? Have us call you.
Got it. We will call you. If you would rather not wait, ring (214) 957-4307 and ask for whoever is on generators.
Specifications
| Model | Cummins C20D6 |
|---|---|
| Rated output | 20 kW |
| Fuel | Diesel |
| Cooling | Liquid-cooled |
| Enclosure | Sound Level 1 enclosure |
| Fuel tank | no tank |
| Weight | 1091 lb |
| Dimensions (L×W×H) | 72 x 34 x 45.5 in |
| Voltage configurations | 120/240 1Ph |
| Extreme cold package | Available as an upgrade |
| Transfer switch | Sold separately, sized to your service |
| Application | light commercial |
| Standby rating | 20 kW / 25 kVA |
| Prime rating | 18.2 kW / 22.8 kVA |
| Engine | V2203-M |
| Alternator | CA115 |
| Emissions | EPA Tier 4i |
| Enclosure options | Available open, or in a Sound Attenuated Enclosure Level 1 or Level 2. A Level 1 to Level 2 upgrade kit exists. |
| Rated speed | 1800 rpm |
| Controller | PowerCommand 1.1 |
| Certifications | NFPA 110 Level 1 compliance, FCC 47 CFR part 15 class A and B |
| Warranty | 2 year / 400 hour base warranty. 3 year and 5 year standby warranty options are available. |
| Extended warranty | Cummins factory coverage for 3 to 10 years, from $300.00. See every price |
Available configurations
This model ships in a single factory configuration.
| Part number | Voltage | Phase | Price |
|---|---|---|---|
| A063P962 | 120/240 | 1Ph | $18,356.15 |
All prices are for the equipment only.
Built in
What the C20D6 does that the spec table does not show
Fuel you control
Diesel is stored on site, so the set is independent of the gas utility entirely. For a clinic, a restaurant, cold storage or a data closet that independence is usually the whole reason for choosing diesel.
1800 rpm
Half the engine speed of a residential air-cooled unit. Fewer revolutions per running hour is why these are specified where the set may run for days rather than minutes.
PowerCommand control
Digital governing, voltage regulation, alarm and status monitoring, with auto-shutdown on fault detection and NFPA 110 Level 1 compliance.
Fuel that needs managing
Diesel degrades, absorbs water and grows biological contamination if it sits. A set that runs rarely needs its fuel maintained, not just topped up — which is part of what a service visit covers.
Accessories and maintenance parts for this unit →
Specifications on this page are taken from the Cummins published specification sheet for
the air-cooled Connect range.
Download it from Cummins →
Pairs with
Transfer switches for a 20kW set
The switch is sized to your electrical service, not to the generator. These are the families that typically apply at this output — we confirm the exact one at the survey.
Questions about the C20D6
How much does a Cummins C20D6 cost installed in Dallas-Fort Worth?
The C20D6 equipment price is $18,356.15. Installation on a 20kW diesel unit varies too widely to band honestly - the pad, the fuel supply, the switchgear and the electrical service are all engineered to the specific site. We quote it in writing after a site survey, and we will tell you the drivers before we quote so you can see where the money goes.
What will the C20D6 actually run?
Light commercial standby for a small office, retail suite, church or IT closet, with diesel stored on site so it runs independent of the gas utility. Final confirmation comes from a load calculation against your actual panel, which we do at the survey.
Do I need a transfer switch with the C20D6?
Yes. A standby generator cannot be code-compliantly connected without an automatic transfer switch - it is what keeps your generator from backfeeding the utility line and endangering line crews. The switch is sized to your electrical service, not to the generator, so we confirm your service size at the survey before specifying it.
Is the C20D6 in stock?
Availability changes weekly. A refundable deposit reserves a specific unit and locks the equipment price for 90 days, which is the practical way to hold one while the survey and permit work happen. If we cannot source it in a reasonable window, you get the deposit back.
Same size, different build
Other 20kW configurations
Same 20kW output. What changes is the enclosure, the transfer switch and whether a cold-weather package is fitted — not the power.
Step up or down
Is 20kW the right size?
The next capacity either side in the diesel range. If you are not sure which way to go, the sizing calculator works it out against your own house rather than its square footage alone.
Up to 30kW — room for a second AC or a well pump.
Cummins C30D6 — Enclosed
Liquid-cooled · Diesel
Equipment from
$21,282.59
Equipment only. Installation quoted after a free site survey.
View detailsWant the C20D6 priced for your address?
Equipment is $18,356.15. The installation number depends on your property, and the only honest way to get it is to come look. That visit is free.
What it is for
Keeping a business open when the power is not
When the power stops the business stops. Refrigeration thaws, the point of sale goes dark, card payments fail, doors and tills stop working and staff get sent home. For a clinic or a restaurant it is not only lost revenue, it is a food-safety and patient-care obligation.
Why it becomes urgent
The same storm and grid events that take out homes take out the block the business sits on, and a commercial outage costs money by the hour from the first minute.
Who buys it
Offices, clinics, restaurants, retail suites and small industrial buildings that cannot close for a day.
The C20D6 is installed across the Dallas–Fort Worth Metroplex by our own licensed crews — the cities we serve, what installation involves, and a free on-site survey before any number is put in writing.
Before you buy the C20D6
The questions that decide whether this is the right machine, answered properly rather than in a sentence on a product page.
- Is 20kW the right size for the load?Size against the connected load and the starting surge, not the floor area.
- Why diesel rather than natural gas?Fuel decides runtime, refueling and what the gas side of the install costs.
- What can my city require?Less than it used to, and a third party can now do the inspection.
- Does 20kW really mean 20kW in August?Nameplate power is quoted at a reference temperature. What this model actually delivers at 100°F.
- Will it start in a freeze?The rating is not the problem. The battery, the propane tank and the cold weather package are.
All the generator guides we have written
Every Cummins diesel standby, 20kW to 200kW · Or a portable, if you only need a few circuits
Installed across Dallas–Fort Worth
The C20D6 ships anywhere in the country. Installation is Dallas–Fort Worth only, carried out by our own licensed crews under TECL #40628 operating from Grand Prairie — because a generator is quoted against your gas meter, your panel and your city, which nobody can do from a warehouse. What installation actually involves.
- Generator installation in Grand PrairieOncor Electric Delivery
- Generator installation in SouthlakeOncor or Tri-County Electric Cooperative, depending on the address
- Generator installation in IrvingOncor Electric Delivery
- Generator installation in AllenOncor, CoServ Electric or Grayson-Collin Electric Cooperative, depending on the address
All 27 cities we install in → · every install includes the permit, the inspection and meeting the inspector on site, and the number comes from a free on-site survey rather than a price list.
After the C20D6 is in
A generator is a fifteen-year relationship, not a transaction. What that looks like from here.
Maintenance and service plans
Skipped maintenance is the top cause of an outage-night no-start. What a visit covers and how often it is due.
The battery, specifically
The component that fails most often when maintenance is skipped, and why the weekly exercise does not prove it is healthy.
Cummins warranty, and ours
What the manufacturer covers, what the installer covers, and which one you call when something fails.
Parts and accessories
Cold-weather kits, maintenance parts and the part numbers that fit this unit.