Comparison · Power supplies

48 V 2.1 A, 100 W power supply or 12 V 100 W 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: Test current: 12 V 100 W power supply (9 A vs. 1.7); Ripple: 48 V 2.1 A, 100 W power supply (50 mV vs. 400); Temperature rise: 48 V 2.1 A, 100 W power supply (64 °C vs. 128).

Model	48 V 2.1 A, 100 W power supply2026Read review →	12 V 100 W power supply2026Read review →
Voltage, V	48	12
Current, A	2.1	8.33
Power, W	100	100
Test current, A	1.7	9
Ripple, mV	50	400
Protection, A	1.7	9.3
Temperature rise, °C	64	128
Review conclusion	With reservations	With reservations

Only in one review: In test 77 W (48 V 2.1 A, 100 W power supply); Efficiency 89 % (12 V 100 W power supply).

48 V 2.1 A, 100 W power supply: Well built, cool-running, and low-ripple, but protection limits output to about 77 W.

12 V 100 W power supply: Efficiency is about 89%, but the output rectifier transistor overheats under heavy load.

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.