IKococater DC Power Supply Variable 30V 10A, Adjustable Bench Supply

I've tested this power supply as a battery charger for both six and twelve volt automotive and electronics batteries in both the constant voltage and constant current modes. I have also checked its performance providing power to low voltage LED lighting circuits and marine and automotive electronics. It's output has remained steady under varying loads. The supplied voltage has been accurate at various levels from 0 to 60 V as determined by voltmeter reading comparisons. I do not have any test gear that can check current reading accuracy. So for non-laboratory handyman use, it performs very well and does everything I need. The unit can provide up to 5 amps at 60VDC, twice the voltage of most comparable units, so if you need that higher supply voltage, this unit will work for you at a reasonable price. That said, it’s still limited to the same 300 watt load typical of the more common 10A/30V units. The user interface is somewhat quirky. The button labeled ON/OFF doesn’t turn the unit ON or OFF - that is the job of the POWER button. The ON/OFF button changes the mode from Constant Voltage (CV) to Constant Current (CC). Given that this is an automatic conversion design, that switch may not even be necessary. The switch also triggers the output power display in the CV mode only. I'm not sure what the purpose of turning the power display off in the CC mode is, since the power seems to be only a mathematical calculation using the voltage and current. Personally, I don't have much use for the power display in either mode, and the reason for this function, and the switch, is not clear. The voltage and current controls could be better, as well. The pushbutton function of the control knob is used to change from coarse to fine adjustment of the current or voltage settings with one selection for each of the four display digits and one for off. This can be tedious and confusing when changing settings. The button has to be pushed a lot in operation - making premature control failure more likely. There is little, if any, need for the off selection, and even less need for separate selection for each decimal place. Other units have separate coarse and fine adjustment knobs – more than enough control in a much better design. My disclaimer is necessary here – I’m a hobbyist, not a professional electronics technician, so if there are reasons for these design features, they may provide value to others and it just may be that I don’t understand them! I can’t say much about longevity since I’ve only had it for a few days, but the unit does what it’s supposed to consistently and reliably at a good price

UPDATE: (5-13-2023) As it turns out I was too generous with my 3.5 star rating. I have to take off AT LEAST another 1.5 stars, and here's why. Based on observations using the Power Supply quite extensively, I've discovered that if you're powering circuits beyond 2.5 amps, (Perhaps less - I need to take some measurements with a resistor in series), the Power supply immediately goes into Constant Current mode & there's nothing you can do about it! So forget about getting anything close to the 150W output the unit is supposed to able to deliver. The only thing I use it for now is the USB port on the front of the unit. That's just SAD! So I decided to pry open my wallet with a crow-bar and purchase a "Real Power Supply". A Lab quality Siglent Technologies unit. Now I'm happy as a pig rolling in mud. I bought this Power Supply after reading the reviews. It seemed like a decent enough supply to put on my bench for proto-typing. I will examine 3 main areas: 1) Operational Effectiveness, 2) Accuracy: 3) Ripple. OPERATIONAL EFFECTIVENESS. It's constructed well, It comes with a standard North American appliance cord, Output Cable with Banana plugs with alligator clips and of course a manual. I'm impressed with the warranty; "Guaranteed for Life" ! (You don't see that very often). To clear up some confusion on the Green Connector as noted in other reviews. This is a physical "EARTH" ground. NOT a "NEGATIVE" voltage. The operation of the unit is mostly straight forward for voltage & current settings. The unit has 2 power buttons on the unit. (I have no clue why !) 1 rocker switch on the back of the unit, and a push Power button on the front of the unit. 1 Power button would've been sufficient. It also has a confusing illuminated button labeled "ON/OFF" in the front. This button is actually the "OUTPUT" button. The Voltage & Current adjustments knobs use Rotary Encoders which provide continuous detents (nice). The Constant Voltage / Constant Current functionality leaves much to be desired in terms of switching between the two modes. This series of power supply is a "Constant Voltage / Constant Current Automatic Conversion Type". Which means: it will change between Constant Voltage / Constant Current mode with load changes. I found controlling this manually, VERY Maddening & frustrating! The displays have a nice bright white LEDs for viewing. It would be nice if this had more weight. (But you don't find weight in "Switching" type power supplies due to the missing large Step-down transformer). If you plug the Banana Cable in to the binding post, the unit will move, or even tip over if you're not careful. So lets get to the "meat"... ACCURACY: Unlike other reviews, I took 9 voltage samples. [NOT just 1, that is not a test of accuracy] Overall, it provides good accuracy on voltages between 1.5v & 30v. Once you go down to 1.49v and lower, the accuracy falls off sharply. But let's be honest, how many circuits do you need to power less than 3.3v? For for that reason I give accuracy "barely" a pass. RIPPLE: Given that this "is" a "Switching" type power supply, it's not surprising that it has some noise, and that's to be expected. But I didn't expect up to see 240mV of the AC component on the Y1 (Positive peak), and 430mV Peak-to-Peak. (BAD ! ). The specifications CLEARLY state: RIPPLE NOISE:

This DC PSU does exactly what it claims to - what a refreshing change from some of the other gear I've gotten from Amazon lately. My specific use case is to power -48VDC telecom hardware in my home lab. Right now it's hooked up to an XGS-PON OLT and doing a fine job of it. I especially like the separate button to engage or disengage client device power without having to power down the entire PSU. The fine grained adjustments are nice too. Overall I'd say this is one of my best Amazon purchases to date.

The first one, plugged it in turned it on lit up for a second then went blank, keeps blowing the fuse. Got a replacement so far so good. Working as expected.