What the cigarette socket can really deliver · review
The cheapest car inverter here, $15.99: 150 W within a car socket’s limit, an AC outlet, two USB ports and a fault light, in a metal case.
At $15.99, PiSFAU’s 150 W inverter is the cheapest on this shelf. It delivers 150 W continuous and 300 W peak, which fits within a car socket fused at 15 A, through a 110 V AC outlet and two USB ports.
PiSFAU pairs a smart chip with a fuse. When the chip detects a fault, it turns off the output and lights a red indicator, which saves guessing.
Its model number, MT-MX150W, nearly matches FOVAL’s MT-MX 150W-3, and the sizes are within a fraction of an inch. FOVAL states a two-year warranty; PiSFAU’s bullets do not mention a term.
Pisfau listed it at $15.99 on November 2, 2026, with 9,431 ratings at 4.4 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 | 110 V AC and 2 × USB |
| Protection | Smart chip and fuse; overheating, reverse connection, under/over voltage, overload, short circuit; red fault light |
| Housing | Metal |
| Size | 3.4 × 2.5 × 1.5 in |
| Weight | About 8 oz |
| Amazon reference | B08YTH66FN |
When the smart chip detects a fault, it cuts output and lights red, so you know the inverter tripped rather than failed.
The model numbers, MT-MX150W and MT-MX 150W-3, point to a common design. FOVAL states a two-year warranty; PiSFAU’s bullets do not state one.
Up to 150 W: string lights, a laptop, a breast pump, a game console or a small TV, per PiSFAU.
8.0/ 10
The cheapest car inverter here, sized for the socket. Its near-twin from FOVAL costs a dollar more with a stated 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 |
|---|---|---|---|---|---|
| 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 |
| 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 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 |
A spare inverter for the glovebox
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
The best-selling car inverter here: 300 W from the cigarette socket, two AC outlets, two USB ports and ETL certification, at 14.4 oz and $26.99.
Best for: Charging laptops, cameras and phones on the road
≈ $27
400 W modified sine wave car inverter, two 110 V AC outlets, USB-C PD 30 W and USB-A QC 3.0, 40 A fuse, ETL certified, iPhone-sized
A 400 W car inverter with a 30 W USB-C PD port and a QC 3.0 USB-A port beside two AC outlets, ETL certified, for $29.98.
Best for: Phones and laptops on the road, where USB-C fast charging matters more than the AC outlets
≈ $30
150 W modified sine wave car inverter, 300 W peak, one 110 V AC outlet and two USB ports (3.1 A total), aluminum shell, 3.2 × 2.5 × 1.5 in, 8 oz, 2-year warranty
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.
Best for: Laptops, string lights and small chargers in any car
≈ $17
