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ReaLoad Engineering Benchmark

Generac XT8500EFI vs. Westinghouse iGen8200TFc

Fuel Benchmark:
Elevation:

ReaLoad Technical Verdict & Engineering Dossier

Motor Surge & HVAC Starting

Generac XT8500EFI delivers 10,000W 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

Bonded neutral generators require terminal bridge disconnection before connecting to home service panels to prevent double-ground GFCI trips.

Natural Gas Leader
Generac XT8500EFI
6,800 W running on NG (+1520 W lead)
Acoustic Winner
Westinghouse iGen8200TFc
65.5 dBA at 23ft (-5 dBA quieter)
Easiest Home Hookup
Generac XT8500EFI
Bonded Neutral (Home Interlock Ready)
Best $/Running Watt
Generac XT8500EFI
$0.17/W ($1,449)
Technical Specification
Open-Frame Inverter
Open-Frame Inverter
Running Watts (gasoline at 0 ft)
Power Output
8,500 WBest
6,600 W
Peak Motor Starting Surge (gasoline)
Power Output
10,000 WBest
8,200 W
Continuous 240V Split-Phase Amps
Power Output
35.4 ABest
27.5 A
Sine Wave Purity (Total Harmonic Distortion)
Power Quality
<2.6% THD (Pure Sine)
<2.3% THD (Pure Sine)Best
Fuel Burn at 25% Load (GPH / Hr)
Fuel Consumption
0.50 GPH
0.37 GPHBest
Fuel Burn at 50% Load (GPH / Hr)
Fuel Consumption
0.81 GPH
0.59 GPHBest
Continuous Runtime on Tank at 25% Load
Fuel Consumption
16 HoursBest
14.5 Hours
Gasoline Fuel Tank Capacity
Fuel Consumption
8 GallonsBest
5.3 Gallons
14-50R Outlets (50A 120/240V Whole-House)
Outlets & Receptacles
1x NEMA 14-50R (50A)Best
None (Use Adapter)
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
4x NEMA 5-20R DuplexBest
2x NEMA 5-20R Duplex
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
70.5 dBA
65.5 dBABest
Chassis Dimensions (L × W × H)
Acoustics & Physical
31.5" L × 25.4" W × 27.4" H
27.8" L × 22.8" W × 24.5" H
Dry Weight with Wheel Assembly
Acoustics & Physical
202 lbs
144 lbsBest
Factory Neutral Bonding (NEC 250.20)
NEC 2026 Hookup
Bonded Neutral (Unbonding Required for Home ATS)
Bonded Neutral (Unbonding Required for Home ATS)
Lowest Verified Street Price
Cost & Value
$1,449.00
$1,249.00Best