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Seregen™ 300 Series

Seregen™ 300 Series

Seregen™ 300 Series Features

The Benefits of High-Efficiency Power Management

Rheem is proud to offer the SEREGEN® 300 Series 20kW Home Generator System. Boasting a 993cc commercial Vanguard™ engine and 28,000 watts of starting power, the system offers whole house comfort & control in an extremely compact & affordable package. The standard 20kW package will supply enough automatic backup power to manage two 5-ton AC units. The optional Power Management System upgrade optimizes the SEREGEN 300 Series with advanced computer-controlled power for maximum efficiency.

Fully Automatic – Advanced electronics will detect a utility power outage and automatically start the generator whether you are home or away.

Whole House Comfort – The SEREGEN 300 Series will supply enough power to manage up to two 5-ton air conditioners in addition to essential household power requirements.

Vanguard™ 993cc Engine – An industry leading commercial grade Big Block™ air-cooled engine provides powerful, quiet, durable performance for large, power hungry homes – perfect for years of heavy-duty standby power.

Continuous Fuel Supply – A permanent connection to natural gas or propane delivers uninterrupted performance with no messy gasoline storage and refueling.

Sound Shield™ Technology – engineered air passages, an automotive-style exhaust system and acoustic foam dampeners ensure quiet operation. (68dB under normal operation)

Turn Key Extras – each system includes a battery/battery charger, hour meter, and installation pad. The engine also comes pre-filled with synthetic oil and is broken in at the factory, saving you time and money.

Premium Warranty – 4 year limited – your guarantee of quality and performance.

Legendary Service & Support – From professional sizing and delivery to installation and service, trust the proven experts at Rheem for complete peace of mind.


  • Lights
  • Furnace Fan
  • Refrigerator/Freezer
  • Garage door opener
  • Security System
  • Humidifier/dehumidifier
  • Entertainment System
  • Sump Pump
  • Outside Lighting
  • Microwave
  • Central Air Conditioner 1
  • Central Air Conditioner 2
  • Range/Stove
  • Dryer
  • Water Well pump
  • Hot Tub
  • Pool Heater
  • Water Heater

  • Fully Automatic Start
  • Provides Whole House Comfort
  • Industrial Strength Engines
  • Continuous Fuel Supply from Natural Gas/Propane
  • Sound ShieldTM Technology
  • Contemporary Space Saving Design
  • Durable Outdoor Enclosure

Seregen™ 300 Series Documents

Stone Services Inc. Generator Batteries
Stone Services Inc. GenAlert Product Sheet
Stone Services Inc. Stat Station Instruction Manual
Stone Services Inc. Indoor Load Monitor Manual
Stone Services Inc. Installation Manual
Stone Services Inc. GEN30LP, GEN30NG Installation and Startup Manual
Stone Services Inc. Oil Heater Installation Manual
Stone Services Inc. Power Management System
Stone Services Inc. Battery Warmer Installation Manual
Stone Services Inc. Installation Check List
Stone Services Inc. GEN30LP, GEN30NG Operator Manual
Stone Services Inc. Wattage Worksheet

Seregen™ 300 Series Warranties

Limited Warranty – 4 Years