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ReaLoadREVIEWS
ReaLoad Engineering Benchmark

GENMAX GM10500XiT vs. Westinghouse iGen12000TFc

Fuel Benchmark:
Elevation:

ReaLoad Technical Verdict & Engineering Dossier

Motor Surge & HVAC Starting

Westinghouse iGen12000TFc delivers 12,000W surge, sufficient for a 3.5-Ton central A/C with soft-starter. Inverters under 7,500W surge will trip breaker overcurrent protection on direct compressor starts.

72-Hour Fuel Logistics

At 50% load over 72 hours, continuous gasoline generators consume ~56 gallons (11x 5-gallon cans). Direct utility Natural Gas hookup eliminates fuel storage degradation, winter freezing, and gas station queues.

NEC 250.20 Neutral Bonding

GENMAX has factory floating neutral, safely compliant with 3-pole transfer switches and manual panel interlocks without ground loop faults.

Natural Gas Leader
Westinghouse iGen12000TFc
7,200 W running on NG (+400 W lead)
Acoustic Winner
Westinghouse iGen12000TFc
64 dBA at 23ft (-4 dBA quieter)
Easiest Home Hookup
GENMAX GM10500XiT
Floating Neutral (Home Interlock Ready)
Best $/Running Watt
GENMAX GM10500XiT
$0.19/W ($1,549)
Technical Specification
Open-Frame Inverter
GENMAX GM10500XiT
$1,549Read Review
Enclosed Inverter
Westinghouse iGen12000TFc
$1,849Read Review
Running Watts (gasoline at 0 ft)
Power Output
8,000 W
9,000 WBest
Peak Motor Starting Surge (gasoline)
Power Output
10,500 W
12,000 WBest
Continuous 240V Split-Phase Amps
Power Output
33.3 A
37.5 ABest
Sine Wave Purity (Total Harmonic Distortion)
Power Quality
<2.4% THD (Pure Sine)
<2.1% THD (Pure Sine)Best
Fuel Burn at 25% Load (GPH / Hr)
Fuel Consumption
0.51 GPH
0.42 GPHBest
Fuel Burn at 50% Load (GPH / Hr)
Fuel Consumption
0.91 GPH
0.84 GPHBest
Continuous Runtime on Tank at 25% Load
Fuel Consumption
13.5 Hours
16 HoursBest
Gasoline Fuel Tank Capacity
Fuel Consumption
6.9 Gallons
7.9 GallonsBest
14-50R Outlets (50A 120/240V Whole-House)
Outlets & Receptacles
1x NEMA 14-50R (50A)Best
1x NEMA 14-50R (50A)Best
L14-30R Outlets (30A 120/240V Twist-Lock)
Outlets & Receptacles
1x NEMA L14-30R (30A)Best
1x NEMA L14-30R (30A)Best
TT-30R Outlets (30A 120V RV Travel Trailer)
Outlets & Receptacles
NoneBest
NoneBest
5-20R Duplex Outlets (20A 120V Household GFCI)
Outlets & Receptacles
2x NEMA 5-20R Duplex
4x NEMA 5-20R DuplexBest
Engine Starting Methods
Starting & Safety
Wireless Remote, Electric Key & Recoil
Wireless Remote, Electric Key & Recoil
Carbon Monoxide Auto-Shutoff Sensor
Starting & Safety
CO Watchdog / Shield Sensor (ANSI/PGMA G300)
CO Watchdog / Shield Sensor (ANSI/PGMA G300)
Noise Level at 23ft (25% Load)
Acoustics & Physical
68 dBA
64 dBABest
Chassis Dimensions (L × W × H)
Acoustics & Physical
30.5" L × 22.4" W × 25.4" H
34.2" L × 25.2" W × 28.6" H
Dry Weight with Wheel Assembly
Acoustics & Physical
156.5 lbsBest
191 lbs
Factory Neutral Bonding (NEC 250.20)
NEC 2026 Hookup
Floating Neutral (Ready for Home Interlock)
Bonded Neutral (Unbonding Required for Home ATS)
Lowest Verified Street Price
Cost & Value
$1,549.00Best
$1,849.00