Generac RD04833ADAL 48kW Diesel Standby Generator
Ships out in 2-3 Business Days
Have questions? 1-888-321-6765 / info@truesteadsupply.com
Ships out in 2-3 Business Days
Have questions? 1-888-321-6765 / info@truesteadsupply.com
The Generac RD04833ADAL is a 48kW liquid-cooled diesel standby generator designed for backup power applications using 120/240V 1-phase service. This Protector Diesel RD Series model is powered by a 3.3L diesel engine and includes a larger tank for longer run time, making it suitable for projects where extended backup capability is an important planning factor. The supplied product data notes that 45kW, 48kW, and 60kW 1800RPM models require an optional catalyst for installation in California or Massachusetts only. Before ordering, buyers should carefully review the kW rating, diesel fuel requirement, voltage, phase, tank configuration, and catalyst requirements with a qualified installer.
The RD04833ADAL is built for standby generator projects where 48kW output, diesel fuel, and 120/240V 1-phase service are required. Final load sizing, site conditions, fuel storage planning, and installation requirements should be reviewed before purchase.
This model is listed with a larger tank for longer run time, helping support extended standby operation when matched to the project’s backup power needs. Diesel storage, venting, fill access, and local code requirements should be confirmed during installation planning.
As part of Generac’s Protector Diesel RD Series, this generator is intended for permanent standby power applications where liquid-cooled diesel performance is preferred. The 3.3L engine platform supports larger residential, estate, light commercial, and facility backup power projects when properly sized.
The supplied product note states that 45kW, 48kW, and 60kW 1800RPM models require an optional catalyst for installation in California or Massachusetts only. Buyers should confirm emissions requirements before ordering, especially for projects in CA or MA.

The Generac RD04833ADAL is designed for permanent standby generator applications where diesel fuel, 48kW output, 120/240V 1-phase service, and a longer-run tank configuration are part of the project requirements. Its product configuration should be reviewed carefully before ordering, especially for CA or MA installations that may require an optional catalyst.
Need help confirming the right diesel generator configuration?
Contact TrueStead Supply for generator sizing guidance, voltage review, and diesel standby power quote assistance.
✔ Backup power guidance ✔ Voltage review ✔ Quote assistance
Contact Us for a Quote| Brand | Generac |
| Series | Protector Diesel RD Series |
| Model / SKU | RD04833ADAL |
| Product Type | Liquid-cooled diesel standby generator |
| Rated Power Output | 48kW |
| Fuel Type | Diesel |
| Voltage | 120/240V |
| Phase | 1-phase |
| Engine | 3.3L engine |
| Tank Configuration | Larger tank for longer run time |
| Catalyst Requirement | Optional catalyst required for California or Massachusetts installation only |