What the cigarette socket can really deliver · review
A credit-card-sized 150 W car inverter with one AC outlet and two USB ports, rated within what a car socket can supply, for $16.99.
FOVAL’s inverter delivers 150 W continuous and 300 W peak, which is about what a car accessory socket fused at 15 A can supply. That makes it one of the few car inverters whose rating you can use in full without wiring it to the battery.
At 3.2 × 2.5 × 1.5 in and about 8 oz, it is the size of a credit card with an aluminum shell. One 110 V AC outlet and two USB ports sharing 3.1 A. A quiet fan and a fuse, with protection against overheating, voltage faults, short circuits and overload.
Its model number, MT-MX 150W-3, is almost identical to the PiSFAU 150 W’s MT-MX150W. The two appear to share a base design; FOVAL offers an aluminum shell and a two-year warranty.
FOVAL listed it at $16.99 on November 2, 2026, with 31,064 ratings at 4.5 stars.
Prices quoted in this text were read on November 2, 2026. The live price is at the top of the page.
| Continuous output | 150 W |
|---|---|
| Peak | 300 W |
| Waveform | Modified sine wave |
| Outputs | 1 × 110 V AC, 2 × USB (3.1 A total) |
| Protection | Fuse; overheating, under/over-voltage, short circuit, overload |
| Housing | Aluminum, quiet fan |
| Size | 3.2 × 2.5 × 1.5 in |
| Weight | About 8 oz |
| Warranty | 2 years |
| Amazon reference | B01H2XD2DY |
A typical accessory socket fused at 15 A supplies about 180 W at 12 V. A 150 W inverter fits inside that, so it runs at its rating without blowing the car’s fuse.
FOVAL lists CPAP machines and nebulizers. It is a modified sine wave inverter; check that the CPAP and its humidifier draw under 150 W and that the maker accepts this waveform.
Both carry closely matching model numbers, MT-MX 150W-3 and MT-MX150W, which suggests a common design. FOVAL has an aluminum shell and a two-year warranty.
8.1/ 10
A small, honest car inverter whose 150 W fits the socket it plugs into. One outlet, modified sine wave, and a two-year warranty.
Same category, nearby prices, between portable power units. What remains is the specifications every one publishes — half empty, a column is no use.
| Model | Price | Continuous output | Outputs | Protection | Housing |
|---|---|---|---|---|---|
| FOVAL 150 W car inverter | $17 | 150 W | 1 × 110 V AC, 2 × USB (3.1 A total) | Fuse; overheating, under/over-voltage, short circuit, overload | Aluminum, quiet fan |
| PiSFAU 150 W car inverter | $16 | 150 W | 110 V AC and 2 × USB | Smart chip and fuse; overheating, reverse connection, under/over voltage, overload, short circuit; red fault light | Metal |
| PiSFAU 200 W car inverter | $25 | 200 W | 2 × 110 V AC, 4 × USB (4.8 A, 24 W total) | Overheating, undervoltage, overvoltage, overload, short circuit | Fully insulated ABS |
| BESTEK 300 W car inverter | $27 | 300 W | 2 × 110 V AC, 2 × USB (4.8 A) | Built-in 40 A fuse; overheating, under/over-voltage, short circuit | Aluminum, smart cooling fan |
Laptops, string lights and small chargers in any car
Specifications: the manufacturer sheet for portable power gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
300 W modified sine wave car inverter, 700 W instantaneous, 11–17 V input (Tesla compatible), two 110 V AC outlets, two USB ports (4.8 A), 40 A fuse, aluminum housing, ETL certified, 14.4 oz
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150 W modified sine wave car inverter, 300 W peak, 110 V AC outlet and two USB ports, smart-chip and fuse protection with fault light, metal housing, 3.4 × 2.5 × 1.5 in, 8 oz
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Best for: A spare inverter for the glovebox
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