Battery Tender® Power Inverter 400 Watt, 12V

The Battery Tender® 400 Watt Power Inverter delivers 400 Watts of continuous 120V AC power from any 12V vehicle battery — more than three times the output of the 120 Watt model, with an LCD display showing real-time output load, battery voltage, and warning status. Two AC outlets, two USB ports, and dual connection options make it the most capable portable power inverter in the Battery Tender® lineup.

400 Watts Continuous — 800 Watts Peak

400 Watts of continuous AC output runs laptops, power tools, small kitchen appliances, fans, CPAP machines, and most portable electronics without issue. The 800 Watt peak surge capacity handles devices with high startup current demands — power tools, motors, and compressors that draw significantly more current during startup than during sustained operation.

LCD Display — Real-Time Power Status

The LCD screen provides live monitoring of three key metrics:

• Output power consumption — percentage of available wattage currently in use
• Vehicle battery voltage — real-time input voltage from the connected battery
• Warning indicators — alerts for low input voltage, overload, or over-temperature conditions

The LCD display provides visibility into how much power is being drawn and how much battery capacity remains — preventing unexpected shutdowns during critical use.

Two AC Outlets and Two USB Ports

Dual AC outlets and dual 5V USB outputs charge and power up to four devices simultaneously from a single 12V battery connection.

Two Connection Options

• Cigarette lighter socket — Instant connection through any 12V accessory outlet
• Alligator clips — Direct battery connection for maximum sustained output and use where cigarette lighter outlets are unavailable or insufficient

Applications

• Camping and overlanding — power appliances, tools, and electronics at remote locations
• Job sites — portable AC power for power tools, battery chargers, and lighting
• Tailgating and outdoor events — run appliances from any vehicle
• Emergency backup power — power essentials during outages from any vehicle battery
• Travel — CPAP machines, medical devices, laptops, and electronics on the road

Specifications

• Input: 12V DC (cigarette lighter or alligator clip connection)
• Continuous output: 400 Watts AC
• Peak surge output: 800 Watts AC
• AC outlets: 2
• USB outputs: 2 × 5V DC
• Display: LCD (output load %, battery voltage, warnings)

1-Year Limited Warranty | DeLand, Florida Since 1965