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ReaLoad Engineering Benchmark

Honda EM6500S vs. Kohler PRO7.5

Fuel Benchmark:
Elevation:

ReaLoad Technical Verdict & Engineering Dossier

Motor Surge & HVAC Starting

Honda EM6500S delivers 6,500W 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

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

Natural Gas Leader
Honda EM6500S
4,400 W running on NG (+4400 W lead)
Acoustic Winner
Honda EM6500S
64 dBA at 23ft (-7 dBA quieter)
Easiest Home Hookup
Honda EM6500S
Floating Neutral (Home Interlock Ready)
Best $/Running Watt
Kohler PRO7.5
$0.24/W ($1,499)
Technical Specification
Open-Frame Inverter
Open-Frame Inverter
Running Watts (gasoline at 0 ft)
Power Output
5,500 W
6,300 WBest
Peak Motor Starting Surge (gasoline)
Power Output
6,500 W
7,500 WBest
Continuous 240V Split-Phase Amps
Power Output
22.9 A
26.3 ABest
Sine Wave Purity (Total Harmonic Distortion)
Power Quality
<2.8% THD (Pure Sine)Best
<4.4% THD (Pure Sine)
Fuel Burn at 25% Load (GPH / Hr)
Fuel Consumption
0.55 GPH
0.45 GPHBest
Fuel Burn at 50% Load (GPH / Hr)
Fuel Consumption
0.90 GPH
0.82 GPHBest
Continuous Runtime on Tank at 25% Load
Fuel Consumption
11.2 Hours
16 HoursBest
Gasoline Fuel Tank Capacity
Fuel Consumption
6.2 Gallons
8 GallonsBest
14-50R Outlets (50A 120/240V Whole-House)
Outlets & Receptacles
None (Use Adapter)
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
Electric Push-Button & Recoil Pull
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
64 dBABest
71 dBA
Chassis Dimensions (L × W × H)
Acoustics & Physical
41.6" L × 27.8" W × 28.3" H
29.4" L × 21.7" W × 23.3" H
Dry Weight with Wheel Assembly
Acoustics & Physical
230 lbs
198 lbsBest
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
$3,299.00
$1,499.00Best