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ReaLoad Engineering Benchmark

GENMAX GM10500XiT vs. Genmax GM12000iET

Fuel Benchmark:
Elevation:

ReaLoad Technical Verdict & Engineering Dossier

Motor Surge & HVAC Starting

Genmax GM12000iET 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
Genmax GM12000iET
7,400 W running on NG (+600 W lead)
Acoustic Winner
Genmax GM12000iET
66 dBA at 23ft (-2 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
Enclosed Inverter
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)
<2.3% THD (Pure Sine)Best
Fuel Burn at 25% Load (GPH / Hr)
Fuel Consumption
0.51 GPHBest
0.58 GPH
Fuel Burn at 50% Load (GPH / Hr)
Fuel Consumption
0.91 GPHBest
1.05 GPH
Continuous Runtime on Tank at 25% Load
Fuel Consumption
13.5 HoursBest
12 Hours
Gasoline Fuel Tank Capacity
Fuel Consumption
6.9 Gallons
7.2 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 DuplexBest
2x 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
66 dBABest
Chassis Dimensions (L × W × H)
Acoustics & Physical
30.5" L × 22.4" W × 25.4" H
31.5" L × 23.5" W × 27" H
Dry Weight with Wheel Assembly
Acoustics & Physical
156.5 lbsBest
195 lbs
Factory Neutral Bonding (NEC 250.20)
NEC 2026 Hookup
Floating Neutral (Ready for Home Interlock)
Floating Neutral (Ready for Home Interlock)
Lowest Verified Street Price
Cost & Value
$1,549.00Best
$1,899.00