Could someone tell me the frequency that this dimmer's pwm module operates at? my eyes are susceptible to led flicker. 60hz would be way too slow.

I just measured mine with an oscilloscope. It switches at 1200 Hz, which is lower frequency than I would’ve expected for a PWM switch. The minimum on period is about 5%, and the maximum is about 92%. Mine has a voltage drop (PWM +Mosfet RDSon) of approximately 1 V with a 14 amp load. it is probably in excess of 1.5 V at it’s rated load (30A). I use a Meanwell 15 volt 200 watt power supply set to 13.2 volts to get full brightness from my 12 V / 14 amp LED string. If you go this route, the voltage adjustment is a small potentiometer next to the terminal block on the power supply.

Will this work on a 18 w 12 v led light?

Yes and these dimmers work very well. I have 2 of them and they control 50 ft. of lights each. They are very "smooth" in dimming. Not all jumpy like others..

I wire from the battery to the "in" side and to the lights (strip led) on the "outside" of the controller. Works once then it won't dim?

I would send it back. Must be defective. Mine work fine

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LED Light Strip Dimmer, DC12V-24V 30A PWM Dimming Controller for Dimmer Knob Adjust Brightness ON/Off Switch with Aluminum Housing

Product ID: 421305167

Details

Connector type
Clamp
Contact type
Normally Open
Current rating
30 Amps
Operating voltage
24 Volts
Operation mode
ON-NONE-OFF

⚡Max 30A current rating

🔆0%-100% PWM dimming

🛡️Aluminum housing for heat & corrosion resistance

€ 26.20

Duties & taxes included

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Description

💡 Elevate your space with precision dimming—because your lighting deserves the spotlight.

BUILT TO ENDURE - Robust aluminum casing ensures superior heat dissipation and corrosion resistance for long-lasting reliability.
LED LIFESAVER TECH - PWM digital dimming prevents rush current, extending your LED strip’s lifespan and protecting your investment.
POWERHOUSE PERFORMANCE - Supports up to 30A at 12-24V, handling high-demand LED strips without breaking a sweat.
PLUG PLAY INSTALLATION - Screw-in terminals and pre-drilled mounting holes make setup quick and hassle-free—get glowing in minutes.
SEAMLESS BRIGHTNESS CONTROL - Rotary knob lets you dial in perfect lighting from 0% to 100%—customize your ambiance effortlessly.

The SUPERNIGHT LED Light Strip Dimmer is a durable, high-performance PWM controller featuring 0%-100% dimming via a rotary knob. Compatible with 12V-24V LED strips up to 30A, it boasts an aluminum housing for excellent heat dissipation and corrosion resistance. Designed for easy installation and LED protection, it’s the smart choice for customizable, long-lasting lighting control.

Specifications

ASIN	B07HN1BJWK
Actuator Type	Rotary
Best Sellers Rank	#112,798 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #240 in Dimmer Switches
Brand Name	SUPERNIGHT
Circuit Type	1-way
Color	Black
Compatible Devices	LED light strips
Connectivity Protocol	Wi-Fi
Connector Type	Clamp
Contact Material	Aluminum
Contact Type	Normally Open
Control Method	Push Button
Control Type	Manual
Controller Type	Mechanical knob
Country Of Origin	China
Current Rating	30 Amps
Customer Reviews	4.3 4.3 out of 5 stars (626)
International Protection Rating	IP44
Item Dimensions	9 x 6.5 x 4 centimeters
Item Weight	0.01 Ounces
Manufacturer	SUPERNIGHT
Material Type	Metal
Model	7539579860
Mounting Type	Surface Mount
Number of Items	1
Number of Positions	1
Operating Voltage	24 Volts
Operation Mode	ON-NONE-OFF
Part Number	BKC1265-GM
Specification Met	Ip44
Switch Type	Rotary
Terminal	Through Hole
Unit Count	1.0 Count
Upper Temperature Rating	80 Degrees Celsius
Wattage	720 watts

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