Comparison · Power supplies

NVVV S-800-70 or 12 Volt 50 Amp 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: In test: NVVV S-800-70 (657 W vs. 595); Test current: 12 Volt 50 Amp power supply (50 A vs. 11.5); Ripple: 12 Volt 50 Amp power supply (250 mV vs. 500); Efficiency: 12 Volt 50 Amp power supply (88 % vs. 87); Temperature rise: 12 Volt 50 Amp power supply (107 °C vs. 230).

Model	NVVV S-800-702020Read review →	12 Volt 50 Amp power supply2017Read review →
Current, A	11.4	50
In test, W	657	595
Test current, A	11.5	50
Under load, V	57.13	11.91
Ripple, mV	500	250
Efficiency, %	87	88
Temperature rise, °C	230	107
Review conclusion	With reservations	With reservations

Only in one review: Voltage 70 V (NVVV S-800-70); Power 800 W (NVVV S-800-70); No load 6 W (NVVV S-800-70); Protection 11.5 A (NVVV S-800-70); Price 27 $ (12 Volt 50 Amp power supply).

NVVV S-800-70: A decent, stable power supply, but it needs modification because of overheating resistors and a noisy fan.

12 Volt 50 Amp power supply: It delivered 595 W in a one-hour test, but sustained power is likely only 450–480 W, with some components overloaded.

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.