New to this stuff. Went to Home Depot for a power cord wasn't sure which was sufficient enough. 13 amp 125volt or 15 amp 125volt?

Either cord will work - the unit has a rated output of 180 watts and is protected for overload. If you hate math - watts=volts x amps. 15 amps is for the output at 12 volts - 15 x 12 =180watts. On power side at 115/120v, the amperage will be significantly lower - 180watts/120volts = 1.5 amps. No grade credit given for this online math course.

what voltage dimmer would you recommend, so i can have 0 to 12 V 20A dc in the output please ? for 15m of led rolls.

LEDs are dimmed via PWM, not voltage. You would still use a 12v PWM dimmer

would one of these be acceptable for a peltier cooling power supply

As long as the voltage and amps match. I’d pare the acceptable cooler amps down to 70% to be safe.

Can this power supply run continuously? Does it need a cooling fan to do so?

I believe it will run continuously at the rated output. At or below the rated output, I've had no requirement for an external fan. The unit appears to be protected with overload protection based on rated output. One note, my unit is not mounted in a air-tight enclosure but utilized as a bench-top unit.

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12V 20A 240W Power Supply

Product ID: 58379437

Details

Brand
ALITOVE
Current Rating
20 Amps
Mounting Type
Wall Mount
Power Source
Dc 12v
Product Dimensions
4.33"D x x

⚡240W max power output

🔒Multi-layer safety protections

🤫Silent fanless design

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KD 13.70

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Details

Brand
ALITOVE
Current Rating
20 Amps
Mounting Type
Wall Mount

Description

⚡ Power up your tech game with silent strength!

SAFETY FIRST - Equipped with automatic overload, overvoltage, thermal, and short circuit protections for worry-free operation.
TRIPLE CHANNEL OUTPUT - Supports three independent output channels for versatile multi-device setups.
POWERHOUSE PERFORMANCE - Delivers a robust 12V DC at 20A, powering your high-demand devices effortlessly.
UNIVERSAL COMPATIBILITY - Perfect for LED strips, CCTV, 3D printers, ham radios, and more — your all-in-one power solution.
WHISPER QUIET OPERATION - Fanless metal casing with optimized heat dissipation ensures silent, reliable performance.

The ALITOVE DC 12V 20A 240W power supply converts AC 110V/220V to a stable DC 12V output with up to 20 amps, featuring adjustable voltage, triple output channels, and comprehensive safety protections. Its fanless metal design ensures silent operation and efficient heat dissipation, making it ideal for powering LED strips, security cameras, 3D printers, and other professional-grade electronics.

Specifications

ASIN	B078RTV41D
Brand	ALITOVE
Brand Name	ALITOVE
Current Rating	20 Amps
Customer Reviews	4.6 out of 5 stars 610 Reviews
Included Components	12V 20A Power Supply
Item Dimensions D x W x H	4.33"D x 7.87"W x 1.96"H
Item Weight	0.6 Kilograms
Manufacturer	ALITOVE
Maximum Frequency	60 Hz
Minimum Frequency	50 Hz
Model	AL12V20AT
Mounting Type	Wall Mount
Part Number	AL12V20AT
Power Source	Dc 12v
Product Dimensions	4.33"D x 7.87"W x 1.96"H
Specification Met	CCC, FCC
UPC	702455811674
Unit Count	1.0 Count

Reviews

A**R

8.03.2026

L**E

2.05.2024

W**S

14.10.2025

J**N

19.02.2026

G**N

30.03.2025

G**I

10.02.2026

J**M

18.10.2025

S**K

10.11.2025

S**Y

17.06.2022

M**.

23.11.2025

S**Y

10.11.2025

N**W

31.01.2026

B**1

22.02.2024

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