Comparison · Power supplies

12 V 120 W power supply or 48 V 2.5 A power supply

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Ripple: 48 V 2.5 A power supply (20 mV vs. 50); Temperature rise: 12 V 120 W power supply (66.5 °C vs. 100).

Model	12 V 120 W power supply2025Read review →	48 V 2.5 A power supply100MHz · 2018Read review →
Voltage, V	12	48
Current, A	10	2.5
Power, W	120	125
Ripple, mV	50	20
Temperature rise, °C	66.5	100
Review conclusion	With reservations	Recommended

Only in one review: In test 150 W (48 V 2.5 A power supply); Test current 3.03 A (48 V 2.5 A power supply); Under load 11.84 V (12 V 120 W power supply); Efficiency 88.8 % (48 V 2.5 A power supply); No load 0.5 W (12 V 120 W power supply); Protection 10.3 A (12 V 120 W power supply); Weight 230 g (48 V 2.5 A power supply); Price 4.69 $ (48 V 2.5 A power supply).

12 V 120 W power supply: A good supply, but in practice it is rated for roughly 100–110 W rather than the claimed 120 W.

48 V 2.5 A power supply: This inexpensive power supply is well built, delivers its rated power steadily, and the author recommends it.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.