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Cummins/Onan QG 2800 Generator Set

The Cummins/Onan QG 2800 is a 2800 kW gasoline standby generator set. It is available at 120 V, single-phase, 60 Hz and rated 23.3 A. The set measures 558.8×414.02×325.12 mm (22.0×16.3×12.8 in), weighs about 56.7 kg (125 lb) and produces 72 dBA at 3 m.

2800 kW
Standby
3
Document types

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Specifications

Fuelgasoline
Frequency60.0 Hz
Standby power2800 kW
Prime power2500 kW
Voltage options120 V
Phase1
Rated current23.3 A
Max ambient500 °C
Dimensions (L×W×H)558×414×325 mm
Dry weight56 kg
Sound level72.0 dBA @ 3 m

Filters & service parts

model family
ItemSpecCapacityPart #Interval
Air filter—
Fuel filter—
Oil filter—
Battery2450 coin battery—5000 hr

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.

Service specifications

9
TypeItemValueUnitCondition
OtherEC-AGS+ gateway dimensions120 x 108 x 38mm
OtherTemperature sensor dimensions51 x 70 x 17mm
ResistanceGateway harness continuity maximum resistance10Ohmsrepair or replace harness if greater
TemperatureEC-AGS+ gateway operating temperature range-40 to 70°C
TemperatureTemperature sensor operating temperature range-40 to 85°C
VoltageEC-AGS+ nominal operating voltage12Vnominal
VoltageEC-AGS+ operating voltage range8 to 16VDC
VoltageMinimum house battery voltage for AGS use9VAGS not allowed below this
VoltageTemperature sensor battery replacement threshold2.5Vreplace when below

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

6
Installation and Setup Test diagnostic
  1. Verify generator set operation using the Start/Stop switch located on the generator set.
  2. Verify manual start/stop of the generator set from the app dashboard using the START and PRIME/STOP buttons.
  3. Check operation of the temperature sensors with Auto mode and Air Conditioning Sense enabled.
  4. Verify the generator set starts automatically when the settings are met.
  5. Verify the accelerometer by driving the vehicle at 10 mph and checking that AGS is automatically disabled.
  6. Verify delayed shutdown: enable AGS, allow the generator set to start, disable AGS, confirm shutdown in 10 minutes.
Connect Components (EC-AGS+ Gateway) installation

⚠ Accidental starting of the generator set can cause severe personal injury or death. Disconnect the starting (battery) cables before performing service.

⚠ Always disconnect a battery charger from its AC source before disconnecting the battery cables.

⚠ Seal all holes to prevent the entrance of exhaust gases into the vehicle interior.

  1. Plug the 12-pin connector from the harness to the EC-AGS+ gateway.
  2. Route the other end of the harness from the gateway to the Y-harness.
  3. For gas generator sets, plug the 8-pin EC-AGS+ harness connector into either lead of the Y-harness.
  4. For diesel generator sets, plug the 10-pin EC-AGS+ harness connector into the longer lead of the Y-harness.
  5. Connect the main lead of the Y-harness to the generator set.
  6. Connect the remaining Y-harness connector to the remote start/stop switch harness.
  7. Route the red wire lead to the positive terminal of the generator set starting battery and extend as necessary using butt connectors.
  8. Provide circuit protection by installing a 5 Amp fuse in the red wire lead.
  9. Locate the common ground location on the vehicle and route the black wire lead to the common ground.
  10. Route the grey wire lead to the engine battery positive terminal (optional connection).
  11. Insert battery ring terminal to the wires and connect the wires.
  12. Use cable ties at not less than 0.5 m (20 in) intervals to keep the wire bundle neat.
Connect Temperature Sensor(s) installation

Tools: Small flathead screwdriver

  1. Remove the lid from the sensor using a small flathead screwdriver.
  2. Remove the plastic battery tab from the sensor to enable the battery to provide power to the sensor.
  3. Place the lid back on the sensor.
Mount Components installation

⚠ High ambient temperature can cause damage to the EC-AGS+ gateway.

  1. Do not install the EC-AGS+ gateway directly inside the generator set compartment.
  2. Mount the EC-AGS+ gateway in a suitable, easily accessible location.
  3. Drill holes for the fastening screws and mount the EC-AGS+ gateway using mounting screws.
  4. Mount the temperature sensor(s) near an A/C thermostat (one per zone, 3 maximum).
  5. Drill 2 holes for screws and mount the sensor.
Temperature Sensor Battery Replacement maintenance

⚠ Pushing on the cover too hard can damage or break it.

Tools: Small flathead screwdriver

  1. Make sure the generator set is not set to start in Auto mode.
  2. Remove the top cover of the temperature sensor using a small flathead screwdriver.
  3. Slide the battery out of the battery holder and remove the battery.
  4. Slide the new battery into the battery holder and replace the cover.
Configure System Using App (Getting Started) operation

⚠ For first time set up or after factory reset, the vehicle must be kept stationary for at least 30 seconds to allow the gateway accelerometer to be configured properly.

  1. Download the EC-AGS+ app from the AppStore for iOS or Play Store for Android.
  2. Reconnect the generator set negative battery cable to power on the EC-AGS+ gateway.
  3. Verify that the EC-AGS+ gateway is powered by observing the LED blinking every 5 seconds.
  4. Turn on Bluetooth on the device containing the app.
  5. Select the EC-AGS+ App and select Start.
  6. Connect the gateway to the app via Discover EC-AGS+, Scan QR code, or gateway password.
  7. Read the End User License Agreement to the end and select Agree.
  8. Create a new password and select Assign Password.
  9. Select the generator set model and type; enter the Start Hours from the hour meter if available.
  10. Select Proceed to Dashboard.

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Common questions

What is the power rating of the Cummins/Onan QG 2800?

The Cummins/Onan QG 2800 is rated 2800 kW standby.

Is the Cummins/Onan QG 2800 diesel or gas?

The Cummins/Onan QG 2800 runs on gasoline.

What is the prime power rating of the Cummins/Onan QG 2800?

The Cummins/Onan QG 2800 is rated 2500 kW prime, against 2800 kW standby.

What is the sound level of the Cummins/Onan QG 2800?

The Cummins/Onan QG 2800 is rated at 72.0 dBA at 3 m, per the manufacturer specification sheet.

What is the dry weight of the Cummins/Onan QG 2800?

The Cummins/Onan QG 2800 has a dry weight of 56 kg (125 lb).

What voltage does the Cummins/Onan QG 2800 produce?

The Cummins/Onan QG 2800 is offered in 120 V, 1-phase.

Parts

85model family
Part #DescriptionQtySystem
122-0645Cquartsc3.5Oil filter Amazon eBay
122-0800Oil filter1Oil filter Amazon eBay $31.23 FridayParts $39.99
122-0800Cquartsc3.5Oil filter Amazon eBay
122-0836CAir FilterAir filter Amazon eBay
140-2105COil FilterOil filter Amazon eBay
140-2379C140-2379cAir filter Amazon eBay
140-2379F140-2379cAir filter Amazon eBay
140-2680IAir FilterAir filter Amazon eBay
140-2897IOil FilterOil filter Amazon eBay
140-3071IAir FilterAir filter Amazon eBay
140-3116COil FilterOil filter Amazon eBay
140-3280COil FilterOil filter Amazon eBay
140-3280EOil FilterOil filter Amazon eBay
140-4151IOil Filter.11 quartsOil filter Amazon eBay
147-0860ISpark PlugSpark plug Amazon eBay
149-1353GAir FilterAir filter Amazon eBay
149-2137HAir FilterAir filter Amazon eBay
149-2279F149-2279FFuel filter Amazon eBay
149-2333ISpark PlugSpark plug Amazon eBay
149-2341Filter, Fuel1Fuel filter Amazon eBay $14.39
149-2457HAir FilterAir filter Amazon eBay
149-2457IAir FilterAir filter Amazon eBay
149-2513IAir FilterAir filter Amazon eBay
149-2661IAir FilterAir filter Amazon eBay
149-2834IAir FilterAir filter Amazon eBay
167-0241DSpark PlugSpark plug Amazon eBay
167-0263Spark Plugs2Spark plug Amazon eBay $19.00
167-0272BSpark PlugSpark plug Amazon eBay
167-0272CSpark PlugSpark plug Amazon eBay
167-0275HSpark PlugSpark plug Amazon eBay
167-0305HSpark PlugSpark plug Amazon eBay
167-1638HSpark PlugSpark plug Amazon eBay
167-1652ISpark PlugSpark plug Amazon eBay
185-2289Glow Plug (12 Volt)Glow plug Amazon eBay $24.95
185-5421Plug, Glow2Glow plug Amazon eBay $35.00
185-5990Glow Plug (12 Volt)1Glow plug Amazon eBay $55.74
185-6623Glow plugGlow plug Amazon eBay $39.99
187-1289Glow plug3Glow plug Amazon eBay
333-080212V Glow PlugsGlow plug Amazon eBay $20.00
A064X819Temperature Sensor1Sensor eBay
044-00087Y Harness - Other QG Generators1Service part / kit Amazon eBay
044-00135Y-Harness, Diesel1Service part / kit eBay
122-0645B122-0645BService part / kit Amazon eBay
122-0645D122-0645DService part / kit Amazon eBay
122-0645I122-0645IService part / kit Amazon eBay
122-0800B122-0800BService part / kit Amazon eBay
122-0827B122-0827BService part / kit Amazon eBay
122-0833C122-0833CService part / kit Amazon eBay
122-0893E122-0893EService part / kit Amazon eBay
140-0495D140-0495DService part / kit Amazon eBay
140-1229D140-1229DService part / kit Amazon eBay
140-2609E140-2609EService part / kit Amazon eBay
140-2842I140-2842IService part / kit Amazon eBay
148-0898C148-0898CService part / kit Amazon eBay
148-0898I148-0898IService part / kit Amazon eBay
149-1353I149-1353IService part / kit Amazon eBay
149-191405EService part / kit Amazon eBay
149-2137I149-2137IService part / kit Amazon eBay
149-2279I149-2279IService part / kit Amazon eBay
167-0237B167-0237BService part / kit Amazon eBay
167-0237C167-0237CService part / kit Amazon eBay
167-0237D167-0237DService part / kit Amazon eBay
167-0247D167-0247DService part / kit Amazon eBay
167-0262B167-0262BService part / kit Amazon eBay
167-0262D167-0262DService part / kit Amazon eBay
167-0272D167-0272DService part / kit Amazon eBay
167-0272G167-0272GService part / kit Amazon eBay
167-0272I167-0272IService part / kit Amazon eBay
167-0275I167-0275IService part / kit Amazon eBay
167-0298B167-0298BService part / kit Amazon eBay
167-0298C167-0298CService part / kit Amazon eBay
167-0305I167-0305IService part / kit Amazon eBay
185-5835B185-5835BService part / kit Amazon eBay
185-5835C185-5835CService part / kit Amazon eBay
187-1000E187-1000EService part / kit Amazon eBay
286-6467)Service part / kit Amazon eBay
326-5366)Service part / kit Amazon eBay
525-030512 oz. Pressurized Spray Can1Service part / kit Amazon eBay
A064X814EC-AGS+ Gateway1Service part / kit eBay
A064X8155 Foot Harness, Gas1Service part / kit eBay
A064X8175 Foot Harness, Diesel1Service part / kit eBay
A065L01310 Foot Extended Harness, Gas1Service part / kit eBay $194.78
A065L01410 Foot Extended Harness, Diesel1Service part / kit eBay
EC-20Battery and Generator Monitoring System1Service part / kit Amazon eBay FridayParts $14.70 KuduParts $298.00
EC-30WWireless Autostart System1Service part / kit Amazon

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
50%2.270.6
100%3.410.9

Available documents

Reference — 0043135 (Cummins/Onan)Reference — F-1823-ENOwner's manual — F-1123-EN (Cummins/Onan)Owner's manual — Onan-EC-AGS Manual (Cummins/Onan)Parts manual — 0058449 (Cummins/Onan)

This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.