Specification
1 of 7
®
*Assembled in the USA using 
domestic and foreign parts
INCLUDES:
Two-Line LCD Multilingual Digital Evolution™ 
Controller (English/Spanish/French/
Portuguese) with external viewing window for 
easy indication of generator status and 
breaker position.
Electronic engine control module optimized 
for power generating.
Isochronous Electronic Governor
Sound Attenuated Enclosure
Closed Coolant Recovery System
Smart Battery Charger
UV/Ozone Resistant Hoses
±1% Voltage Regulation
Field convertible fuel type with no mechanical 
adjustment required.
5 Year Limited Warranty
UL 2200 Listed
Protector
®
Series
Standby Power Rating
 Model RG048 (Aluminum - Bisque) - 48 kW 60 Hz
Protector® Series
Meets EPA Emission Regulations
FEATURES
 INNOVATIVE DESIGN & PROTOTYPE TESTING are key components of
GENERAC’S success in “IMPROVING POWER BY DESIGN.” But it doesn’t
stop there. Total commitment to component testing, reliability testing,
environmental  testing,  destruction  and  life  testing,  plus  testing  to
applicable CSA, NEMA, EGSA, and other standards, allows you to choose
GENERAC POWER SYSTEMS with the confidence that these systems will
provide superior performance.
 SOLID-STATE,  FREQUENCY  COMPENSATED  VOLTAGE
REGULATION. This state-of-the-art power maximizing regulation system is
standard on all Generac models. It provides optimized FAST RESPONSE to
changing load conditions and MAXIMUM MOTOR STARTING CAPABILITY
by  electronically  torque-matching  the  surge  loads  to  the  engine.  Digital
voltage regulation at ±1%.
TEST CRITERIA:
 PROTOTYPE TESTED  NEMA MG1-22 EVALUATION
 SYSTEM TORSIONAL TESTED  MOTOR STARTING ABILITY
 SINGLE SOURCE SERVICE RESPONSE from Generac’s extensive dealer
network provides parts and service know-how for the entire unit, from the
engine to the smallest electronic component.
 GENERAC  TRANSFER  SWITCHES.  Long  life  and  reliability  are
synonymous  with  GENERAC  POWER  SYSTEMS.  One  reason  for  this
confidence  is the  GENERAC product  line is  offered  with  its  own transfer
systems and controls for total system compatibility. 
PROTECTOR® SERIES
Standby Generators
Liquid-Cooled Gaseous Engine
*Only if located away from doors, windows, and fresh air intakes, 
and unless otherwise directed by local codes.







