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Compact silver inverter with cigar lighter plug and battery clamps, three-prong outlet and USB port, 5.9 by 4.5 by 1.8 inches

Samlex

Samlex SAM-450-12 Modified Sine Wave Inverter 450W 12V

SKU CH-15NS-3FQSR

Converts 12 VDC to 115 VAC modified sine wave at 60 Hz with 450 W output, 12 V lighter socket or battery clamp connection, three-prong outlet, 5 V 2.1 A USB port, load-controlled fan.

  • Converts 12 VDC to 115 VAC 60 Hz for household devices
  • USB port delivers 5 VDC at 2.1 A for phones and tablets
  • Input range 10.5 to 16 VDC suits vehicle and battery sources
  • Universal protection covers thermal, overload, short circuit and earth fault
  • Compact 5.9 x 4.5 x 1.8 in design with lighter plug and battery clamps included

What it is and who it suits

The Samlex SAM-450-12 is a 450W modified sine wave inverter that changes 12 VDC into 115 VAC at 60 Hz. It connects through a 12V lighter socket or the supplied battery clamps and provides one three-prong outlet plus a USB charging port rated at 5 VDC and 2.1A. It suits drivers, boaters and RV users who need AC power for laptops, phones, cameras, small stereos or lights while away from mains supply.

Thermals noise and draw in normal use

A load-controlled cooling fan runs only when needed, keeping the case surface cool during typical loads. At no load the unit draws just 0.2 A to 0.3 A from the battery, and low-interference technology reduces electrical noise that could affect sensitive devices. Universal protection covers thermal, battery, overload, short-circuit and earth-fault conditions, while soft-start technology limits inrush current when equipment is first switched on.

Behaviour under sustained load

Continuous output up to 450 W draws 22.3 A to 24.2 A from a 12.5 VDC nominal source across the 10.5 VDC to 16 VDC input range. A low-battery input alarm sounds before voltage drops too far, and power-save mode reduces standby consumption during long sessions. The compact 5.9 x 4.5 x 1.8 in enclosure weighs 4 lbs and carries ETL safety listing for added confidence during extended operation.

How it compares

Measured against everything we stock in Jump Starters, Chargers & Power Packs, at today’s prices. Recalculated every night.

Price $141.99
Pricier than about 90% of the 1,744 comparable items (median $14.99).

Specifications

Product
Brand nameSamlex
Model nameSAM-450-12

Questions about this item

How do I connect the inverter to a 12 V battery and what step is often missed?

Use the supplied battery clamps for direct connection or the cigar lighter plug for the accessory socket; the step often missed is confirming the lighter socket can handle the 22.3 A to 24.2 A draw at full load.

What ongoing maintenance does the SAM-450-12 require?

Keep the load-controlled cooling fan vents clear of dust and debris; periodically check that the battery clamp terminals and cigar lighter plug contacts stay clean and tight for reliable 12 VDC input.

What limit appears first during continuous 450 W operation?

The 12 VDC input current rises to 22.3 A to 24.2 A, so the vehicle’s accessory wiring or battery capacity usually becomes the limiting factor before the inverter’s own protection circuits activate.

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