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ReaLoad Engineering Benchmark

EcoFlow DELTA Pro Ultra (6kWh LiFePO4) vs. GENMAX GM10500XiT

Fuel Benchmark:
Elevation:

ReaLoad Technical Verdict & Engineering Dossier

Motor Surge & HVAC Starting

EcoFlow DELTA Pro Ultra (6kWh LiFePO4) delivers 10,800W 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

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

Natural Gas Leader
EcoFlow DELTA Pro Ultra (6kWh LiFePO4)
7,200 W running on NG (+400 W lead)
Acoustic Winner
EcoFlow DELTA Pro Ultra (6kWh LiFePO4)
30 dBA at 23ft (-38 dBA quieter)
Easiest Home Hookup
EcoFlow DELTA Pro Ultra (6kWh LiFePO4)
Floating Neutral (Home Interlock Ready)
Best $/Running Watt
GENMAX GM10500XiT
$0.19/W ($1,549)
Technical Specification
Enclosed Inverter
Open-Frame Inverter
Running Watts (gasoline at 0 ft)
Power Output
7,200 W
8,000 WBest
Peak Motor Starting Surge (gasoline)
Power Output
10,800 WBest
10,500 W
Continuous 240V Split-Phase Amps
Power Output
30 A
33.3 ABest
Sine Wave Purity (Total Harmonic Distortion)
Power Quality
<1.2% THD (Pure Sine)Best
<2.4% THD (Pure Sine)
Fuel Burn at 25% Load (GPH / Hr)
Fuel Consumption
0.00 GPH (Solar/Battery)Best
0.51 GPH
Fuel Burn at 50% Load (GPH / Hr)
Fuel Consumption
0.00 GPH (Solar/Battery)Best
0.91 GPH
Continuous Runtime on Tank at 25% Load
Fuel Consumption
6 kWh CapacityBest
13.5 Hours
Gasoline Fuel Tank Capacity
Fuel Consumption
No Tank (LiFePO4)
6.9 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
1x NEMA TT-30R (RV)Best
None
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
Push-Button Instant UPS (0ms)
Wireless Remote, Electric Key & Recoil
Carbon Monoxide Auto-Shutoff Sensor
Starting & Safety
Zero CO Emission (Safe Indoors)
CO Watchdog / Shield Sensor (ANSI/PGMA G300)
Noise Level at 23ft (25% Load)
Acoustics & Physical
30 dBABest
68 dBA
Chassis Dimensions (L × W × H)
Acoustics & Physical
27.2" L × 18.9" W × 25.6" H
30.5" L × 22.4" W × 25.4" H
Dry Weight with Wheel Assembly
Acoustics & Physical
152.1 lbsBest
156.5 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
$5,799.00
$1,549.00Best