Which generator delivers more running wattage, the GXS12000RD or the GM12000iET?

A-iPower GXS12000RD delivers higher continuous output with 9000 running watts on gasoline.

Is the GXS12000RD quieter than the GM12000iET?

Genmax GM12000iET is quieter at 50% load, measured at 69.5 dBA at 23 feet.

Which model is better suited for a whole home transfer switch interlock?

Genmax GM12000iET features a factory floating neutral ready for standard transfer switch hookup without modification.

ReaLoadREVIEWS

Home Backup & Portable Power Guide

ReaLoad Engineering Benchmark

A-iPower GXS12000RD vs. Genmax GM12000iET

Highlight Differences

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 (+7400 W lead)

Acoustic Winner

Genmax GM12000iET

66 dBA at 23ft (-8 dBA quieter)

Easiest Home Hookup

Genmax GM12000iET

Floating Neutral (Home Interlock Ready)

Best $/Running Watt

A-iPower GXS12000RD

$0.12/W ($1,099)

Technical Specification	Open-Frame Inverter A-iPower GXS12000RD $1,099Read Review	Enclosed Inverter Genmax GM12000iET $1,899Read Review
Running Watts Power Output	9,000 WBest	9,000 WBest
Peak Starting Surge Power Output	12,000 WBest	12,000 WBest
240V Output Amps Power Output	37.5 ABest	37.5 ABest
Sine Wave Purity Power Quality	<5% THD (Pure Sine)	<2.3% THD (Pure Sine)Best
Fuel Burn (25%) Fuel Consumption	0.48 GPHBest	0.58 GPH
Fuel Burn (50%) Fuel Consumption	0.95 GPHBest	1.05 GPH
Runtime (25% Load) Fuel Consumption	14 HoursBest	12 Hours
Fuel Tank Capacity Fuel Consumption	8 GallonsBest	7.2 Gallons
14-50R 50A Outlet Outlets & Receptacles	1x NEMA 14-50R (50A)Best	1x NEMA 14-50R (50A)Best
L14-30R 30A Outlet Outlets & Receptacles	1x NEMA L14-30R (30A)Best	1x NEMA L14-30R (30A)Best
TT-30R RV Outlet Outlets & Receptacles	NoneBest	NoneBest
5-20R Duplex Outlets Outlets & Receptacles	2x NEMA 5-20R DuplexBest	2x NEMA 5-20R DuplexBest
Engine Start Method Starting & Safety	Electric Push-Button & Recoil Pull	Wireless Remote, Electric Key & Recoil
Carbon Monoxide Sensor Starting & Safety	CO Watchdog / Shield Sensor (ANSI/PGMA G300)	CO Watchdog / Shield Sensor (ANSI/PGMA G300)
Noise Level (23ft) Acoustics & Physical	74 dBA	66 dBABest
Chassis Dimensions Acoustics & Physical	28.5" L × 26" W × 26.5" H	31.5" L × 23.5" W × 27" H
Dry Weight Acoustics & Physical	218 lbs	195 lbsBest
Neutral Bonding NEC 2026 Hookup	Bonded Neutral (Unbonding Required for Home ATS)	Floating Neutral (Ready for Home Interlock)
Verified Street Price Cost & Value	$1,099.00Best	$1,899.00

ReaLoad Technical Verdict Dossier

Motor Inrush Starting Surge

The A-iPower GXS12000RD delivers 12000W peak surge compared to 12000W on the Genmax GM12000iET. Starting a 3.5-ton central air conditioner requires an electronic soft-starter to reduce compressor inrush below breaker trip thresholds.

72-Hour Outage Fuel Logistics

At 50% electrical load over a 72-hour power outage, GXS12000RD consumes about 68 gallons while GM12000iET burns 76 gallons. Homeowners need 14 sealed 5-gallon gasoline cans or utility natural gas.

Home Panel Interlock Safety

A-iPower GXS12000RD features a bonded neutral, requiring ground jumper removal before connecting to home breaker panels. Follow NEC 250.20 safety grounding rules.

Head-to-Head Telemetry Comparison

Specification	A-iPower GXS12000RD	Genmax GM12000iET
Running Watts (Gasoline)	9000W	9000W
Peak Watts (Gasoline)	12000W	12000W
Operating Noise @ 23ft	76 dBA	69.5 dBA
Factory Neutral Status	Bonded Neutral	Floating Neutral
Dry Weight	218 lbs	195 lbs
Verified Street Price	$1099	$1899