Generac 18kW Home Standby Generator – G0072590

Why Homeowners Choose the Generac 18kW Home Standby Generator

Automatic backup power + smart monitoring

• Mobile Link® (cellular standard + Wi-Fi/Bluetooth) enables remote status checks, alerts, and readiness confirmation from a phone/tablet/PC.

• Power Zone™ 200 offers clear system status indicators, maintenance reminders, and robust protection/diagnostics.

Clean, utility-quality power for sensitive electronics

• True Power™ Electrical Technology delivers less than 5% THD, helping protect and support sensitive electronics and many modern appliances.

Quieter weekly exercise

• Quiet-Test™ low-speed exercise mode helps reduce noise during scheduled self-tests while keeping the system ready.

Installation-friendly footprint

• Listed and labeled allowing installation as close as 18 in (457 mm) to a structure when installed to code and away from doors, windows, and fresh air intakes.

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What’s Included (Generator System Features)

• Cellular connectivity standard, plus Wi-Fi™ and Bluetooth™

• Electronic Fuel & Ignition Control (EFIC)

• Hydraulic lifters

• Smart Exercise Technology

• True Power™ Electrical Technology (<5% THD)

• Power Zone™ 200 controller

• Electronic governor

• Oil level sensor

• Sound-attenuated enclosure

• Natural gas or liquid propane operation

• 5-Year limited warranty (generator + transfer switch)

Bundled models include a 200A service-rated automatic transfer switch.

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Output Ratings (LP vs Natural Gas)

This generator is commonly referred to as 18 kW, with output depending on fuel type:

• Liquid Propane (LP): 18 kW

• Natural Gas (NG): 17 kW

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Technical Specifications (Generac 18kw Home Standby Generator)

Electrical

• Rated voltage: 240V

• Phase: 1

• Frequency: 60 Hz

• Power factor: 1.0

• Rated maximum continuous load current @ 240V (LP / NG): 75A / 71A

• Main line circuit breaker (generator disconnect): 80A

• Total Harmonic Distortion (THD): < 5%

Sound Levels (measured at 23 ft / 7 m)

• Normal load operation: 65 dB(A)

• Quiet-Test™ low-speed exercise mode: 55 dB(A)

Dimensions & Weight (generator only)

• Dimensions (L × W × H): 46.4 × 26.3 × 30.7 in (117.9 × 66.8 × 77.9 cm)

• Unit weight (without battery): 426 lb (193 kg)

Dimensions shown are approximate. Always follow the installation manual for exact clearances and placement.

Battery Requirement (not included)

• 12V AGM Powersport Battery Group BTX20L, 310 CCA minimum
  (Recommended battery part number commonly listed for this platform: A0006487350)

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Engine & Controller Highlights

G-Force™ 800 Series Engine

• 2-cylinder, 817 cc, OHV

• Hydraulic lifters

• Solid-state ignition

• Electronic governor

• Operating speed: 3,600 RPM

• Oil capacity (including filter): approx. 2.5 qt (2.4 L)

Power Zone™ 200 Controller

The Generac 18kw Home Standby Generator is designed for reliable automatic operation, clear status reporting, and service-friendly diagnostics, including:

• System mode control (Auto/Manual/Off/Service)

• Configurable exercise settings and exercise duration

• Maintenance reminders and protection logic

• Smart battery charging (AGM compatible)

• Firmware upgrade capability via cellular or Wi-Fi (where enabled)

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Fuel Type, Fuel Consumption, and Fuel Pressure Requirements

Fuel Type

• Natural Gas (NG) or Liquid Propane (LP)

Fuel Consumption (18 kW)

Natural Gas

• 1/2 load: 164 ft³/hr (4.65 m³/hr)

• Full load: 235 ft³/hr (6.64 m³/hr)

Liquid Propane

• 1/2 load: 60 ft³/hr (1.65 gal/hr) [6.26 L/hr]

• Full load: 105 ft³/hr (2.87 gal/hr) [10.87 L/hr]

Required inlet fuel pressure (at generator fuel inlet, all load ranges)

• Natural Gas: 3.5–7 in. water column (0.87–1.74 kPa)

• Liquid Propane: 10–12 in. water column (2.49–2.99 kPa)

Fuel piping must be sized correctly for full-load operation and installed to code.

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Operating Temperature Range (Cold-Weather Guidance)

The Generac 18kw Home Standby Generator is tested to perform within:

• -20°F (-29°C) to 122°F (50°C)

For areas where temperatures fall below 32°F (0°C), a cold weather kit is recommended.

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Transfer Switch Options (Unbundled vs Bundle)

Bundle (Recommended for a complete, code-ready system)

Bundled models include a 200A service-rated transfer switch with features such as:

• 200A, 120/240V, 1-phase

• 2-pole design

• Standard NEMA/UL 3R outdoor aluminum enclosure (indoor/outdoor mounting flexibility)

• Integrated surge protection

• Fuse Control Module (FCM) included (standard on bundled switch systems)

• Transfer switch weight: 39.0 lb (17.7 kg)

Energy Management / load management devices are typically sold separately when required for larger homes or heavy loads.

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Model Numbers, Finish, and UPCs (18 kW)

• G007259-0 — 18 kW generator (unbundled) — UPC: 696471103717

• G007324-0 — 18 kW generator + 200A service-rated transfer switch bundle — UPC: 696471104721

• Finish commonly listed for this series: Aluminum enclosure in Metro Gray

Certification note (important for buyers): documentation for this series notes that CETL certification applies to unbundled generator units, and bundled units are ETL certified in the USA only. If you’re purchasing in Canada, confirm the exact certification requirements for your municipality and installation configuration