Generac Protector 48kW Diesel (RD04833)
48000 W, diesel
Generac Protector XG 40kW
Standby generator · Protector Series. Specs from the manufacturer page (checked ).
The Generac Protector XG 40kW is a standby generator rated at 40,000 running watts that runs on liquid propane or natural gas. It senses a power outage, turns on automatically, and is designed to power an entire home or business.
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Running
40000W
Fuel
dual-fuel
Weight
808kg
Key features
- Rated at 40,000 running watts (W), with a 4.5 L, 4-cylinder in-line engine
- Runs on liquid propane or natural gas; fuel type is selected from the controller
- Quiet-Test mode runs a five-minute test at a lower speed and can be scheduled weekly, biweekly, or monthly
- TruePower technology with less than 5% total harmonic distortion
- Cellular connectivity for monitoring through Mobile Link
- Regular maintenance items (oil and oil filter, air filter, spark plugs, coolant, battery) are accessible from one side
- Aluminum enclosure with a stainless-steel exhaust system for corrosion resistance
- Weight 808 kg (1,781 lb); oil capacity 11 l
What it is for
- Whole-home backup power during an outage
- Business backup power during an outage
Specifications
| Running watts | 40000 W |
|---|---|
| Fuel | dual-fuel |
| Weight | 808 kg (1781.3 lb) |
From the Generac page. Values the manufacturer does not publish are left out.
Similar standby generators
Generac Protector XG 32kW
32000 W, dual-fuel
Generac Protector XG 48kW
48000 W, dual-fuel
Generac Protector 30kW Diesel (RD03022)
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Generac Protector 50kW Diesel (RD05033)
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Generac Guardian 28kW
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Connection and wiring
Follow the diagrams in the Generac manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
Open the Generac manual (PDF) →
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Auxiliary Shutdown | Active alarm that must be cleared before the generator can start. | Verify the controller-face emergency shutdown switch is ON (I). Clear the alarm. If equipped, the rocker switch must be set to ON (I) to clear it. | 17 |
| Overcrank | Fault during initial startup. The generator may exceed the normal number of start attempts because air accumulated in the fuel system during installation. | Reset the alarm and restart up to two more times, if necessary. If the unit still fails to start, contact an IASD for assistance. Call service if it persists. | 19 |
| Battery Problem | Listed as a warning. Warnings do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Canbus Error | Listed as a warning. Warnings alert the operator to conditions that do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Charger Missing AC | Listed as a warning. Warnings do not disable the unit or require immediate correction. No specific description given. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
| Charger Warning | Listed as a warning. Warnings do not disable the unit or require immediate correction. The manual notes a warning appears when the battery requires service. | Unless correctly trained to correct and clear warnings, contact an IASD or trained service technician. To clear the message, press OFF on the controller, then ENTER. Call service if it persists. | 26 |
6 of 54 codes. From the Generac manual. All 54 Guardian 24kW / Guardian 22kW / Guardian 26kW / Guardian 18kW codes →
FAQ
Can the Generac Protector XG 40kW start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 40000 W output (no separate peak published). That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.