Generac Protector Series 20,000 Watt (20kW) Liquid Cooled Diesel Standby Generator Single-Phase (120 / 240V) with Extended Run Tank

The Generac RD02025 is a rugged and reliable 20kW diesel standby generator, part of the Protector™ Series, designed to deliver consistent power for residential estates and light commercial facilities. Built with durability and ease of code compliance in mind, this generator offers fuel-efficient performance, quiet operation, and advanced digital controls, making it an ideal solution for demanding backup power needs.

This model is powered by an inline 4-cylinder, liquid-cooled diesel engine running at a low 1800 RPM, engineered specifically for long-life operation in generator environments. It provides 83 amps at 120/240V single-phase or 69 amps at 120/208V three-phase, making it versatile for a range of residential and commercial installations.

The Evolution™ Controller features a two-line multilingual LCD display with color-coded, backlit buttons for intuitive operation. Real-time system status, alerts, and maintenance reminders are all accessible through the display. When paired with Mobile Link™ (sold separately), users can monitor their generator remotely from any smart device.

Noise is minimized with Quiet-Test™ technology, which enables the generator to perform weekly self-tests at a lower RPM, reducing both sound and fuel use. The RD02025 runs at just 65 dB(A) during exercise and 70 dB(A) under full load, making it suitable for use near residences or in noise-sensitive areas.

This model also excels in fuel economy, consuming just 1.05 gallons of diesel per hour at half load and 1.98 gallons per hour at full load. The generator is housed in a steel enclosure finished in gray, and includes a UL 142-listed, double-walled base fuel tank for environmental protection and simplified installation.

Installation is service-friendly, with removable access doors, an external viewing window, and easy access to the breaker and fuel fill. The generator is UL 2200 listed, EPA emissions certified, and comes backed by a 5-year limited warranty for peace of mind.

Key Features:

• 20kW Diesel Standby Output – Suitable for large homes, farms, and small businesses
• 4-Cylinder Liquid-Cooled Engine – Operates at 1800 RPM for longer engine life and fuel efficiency
• Single & Three-Phase Options – Flexible configurations support 120/240V and 120/208V systems
• Evolution™ Digital Controller – Multilingual LCD with diagnostics, alerts, and user-friendly controls
• Quiet-Test™ Weekly Exercise Mode – Lower RPM self-test minimizes sound and fuel usage
• Low Noise Levels – Just 65 dB(A) in exercise and 70 dB(A) at full load
• Efficient Fuel Use – Consumes 1.98 gal/hr at full load
• Double-Walled Base Tank – UL 142-listed for environmental safety and code compliance
• Removable Doors & Viewing Window – Simplifies inspections and service
• 5-Year Limited Warranty – Backed by Generac’s nationwide dealer service network

The Generac RD02025 delivers dependable diesel power, low maintenance, and code-friendly installation—making it a smart investment for anyone who needs quiet, reliable backup power in any environment.

Overview:

• Product Category: Home Standby Generator
• Generator Features: Low Oil Alert/Shutdown
• Product Weight: 1757 lbs
• Length: 81"
• Width: 31"
• Height: 61"

Specifications:

• Voltage: 120, 240V
• Frequency: 60 Hz
• Running Wattage: 20,000 Watts
• Fuel Type: Diesel
• Amperage: 83A
• Decibel Rating @ 7m: 70 dbA
• Enclosure Material: Aluminum
• Mounting Pad: Concrete (Not Included)
• Cooling Type: Liquid Cooled
• Wi-Fi: Yes

Engine:

• Engine Brand: Mitsubishi
• Starting System: 12v Auto Start
• Cubic Capacity: 2500 CC
• Horsepower: 33.5 HP
• RPM: 1800 RPM
• Low Oil Alert/Shutdown: Yes

Product Assurance:

• Certifications: UL
• EPA Compliant
• Made in America
• Approved for Commercial Use
• Warranty: 5 Year Commercial, 5 Year Commercial Engine, 5 Year Residential, and 5 Year Residential Engine