WF-5118 Inverter

WF-5118 Inverter

WFCO’s 1800 W WF-5118 Inverter is engineered for outstanding performance. It provides high-efficiency power at full-load conditions with safeguards that include overload protection, over-temperature protection, short-circuit protection, and reverse polarity protection. The cooling fan enhances the efficiency as the load incurred by the Inverter controls its operation.

The WF-5118 Inverter features an automatic transfer switch, pure sine wave output, hi-tech filtering for premium electronics and refrigerators, and an easy hi-pot testing design. The Inverter also has LED status indicators that display battery charge and inverter load levels, a low battery indicator, and a remote-control system that features the exact display menu as the unit.

To learn more about our products through video, click here. For any WFCO resources, tools, and information on our products, email with your request, or click here to download the WFCO Product Catalog.

Additional Information

DC Input Voltage

12V DC

Output Waveform

Pure Sine Wave (THD <3%)

Efficiency (full load)


Status Indicator Lights

Green – AC normal; Amber – On battery; Red – Overload, fault two LED bars (with 4 LEDs) – Battery & Load Level

Transfer Switch

Automatically transfer to battery power whenever AC power fails DPDT relay with 20A/120Vac contact rating

Transfer Time

<50 milliseconds

Protection Features

AC Output Power, Internal Cooling, Over Temperature, Overload, Reverse Polarity (fuse), Short Circuit


cUL458, FCC Class B compliant


16.2 L x 10.8 W x 6.65 H (inch) / 412 L x 274 W x 169 H (mm)


Net: 9.08 kgs / 20 lbs; Gross: 10.9 kgs / 24 lbs



Input Voltage/Hz

120 VAC, 60 Hz

Input Voltage Range

10-15 VDC

AC Voltage Regulation

+/- 3% from no load to full load under battery range

Remote Control Panel


Overload Protection

Current limiting & shutdown

Reverse Polarity Protection

Fuse Protected

Over Temperature Protection

System Shut Down

AC Output Power

Protected by 20A/120VAC Circuit Breaker

Internal Cooling

DC brushless forced fans

DC Connection

#2/0 AWG wires required and with 250Adc in-line fuse