For under 23$ and free 2 day shipping, I decided to click 'place order' on this 30 amp MW CloneI have 2 batteries, a flooded and an AGM battery which I never discharge together, but which require vastly different charging ABSvoltages. My Schumacher has proven unreliable and simply cannot handle being a converter due to YoYoing voltage with cycling loads when batteries are near fully charged.With this I hope to choose 14.7v, 14.9v, 15.3v, 13.1v or 13.6v depending on which battery is at which state of charge, and I will use my solar controller to do my 16v EQ sessions when the Hydrometer dictates. I really expect to use this mostly as an occasional overnight floater/power supply rather than a top charger, but of course I want that ability too.Been considering attaching a 16$ digital Ammeter/voltmeter combo to it, or just plug in my Turnigy clone GTpower amp hour counter into it via the 45 amp Anderson powerpoles connectors, but it has a tendency to warm up and read higher voltages than exist when passing a continuous 25 amps which would make adjusting voltage a bit more tedious.But I just saw a brand new review after ordering saying it was delivered with pieces rattling around in it. Wonder if it was somebody from here?Anyway It should be here on Wednesday and I'll report back with my findings after hooking it up on a depleted battery and see what it can do.It it rattles, back it goes. If it cannot go upto 15.3v back it goes. If it cannot hold 30 amps, back it goes, and I'll get the MW instead.

If it rattles, neuter the fan, by removing it. Paste a thicker fan on top.if the voltage control is not up to snuff replace the pot with a 15 turn. None of the fans in these PSU are worth a nickel. Not even the MeanWell's fan. Two of these poor devils are due to arrive at Dracula's castle. Along with 15-turn pots, a shoebox size resistor assortment and capacitors galore. They're going to work or they will glow in the dark - momentarily.

Yeah, I read the review where the inductor was loose in one that an Amazon customer received. That is probably due to rough shipping and is a chance occurrence. If you feel up to it or are going to put a different potentiometer on the board, could you post a couple of pictures of the innards? I'm just curious as to what they are using for discrete components deep in the heart of China.

I'll definitely get some macro pictures of the internals and post them up if it actually works properly out of the box.The fan replacement will be top of the list if it does prove to be functional when delivered. I've got a lot of experience with replacing fans. I'd really love to get a nice finger turn pot wired in there, but I have very little experience soldering onto circuit boards, but am willing to try. It is the primary reason I went with the Clone over the MW at ~3x the price, so failure will not hurt as much.Am considering adding this product, or similar, to it too:combo Ammeter/voltmeterFound this Utube video on this very similar product which is not too confidence inspiring. but there are current and voltage calibration pots, and perhaps modifying the shunt as the filmer does is possible to get it 'close enough' if the calibrations are not enough.http://www.youtube.com/watch?v=1mpuF2Ss7J8

This is to arrive tomorrow afternoon if USPS tracking is to be believed.I am interested to see the voltage range it allows. The reviewers on another etopxizu 30 amp power supply with an ~ 2$ higher price all claim different ranges. Some saying 9 to 13, others saying 10 to 13.8, and others 11 to 14.4v, so not confidence inspiring. Lots of DOA reviews too, and some claiming a quiet fan and others saying it is extremely loud, some saying it has 2 speeds, others just one, and other claiming a full variable speed fan depending on load.Also wondering how much it can really supply when hooked up to a depleted "pure lead" AGM battery, and how much voltage sag at the terminals will occur then.It appears that getting 15.3v from it might require a pot change, necessity not luxury. I think I have a 10k ohm pot around somewhere. Looks like I should start reading up on desoldering / soldering to circuit boards.

Use your DMM and resistance setting (and a strong pair of reading glasses) and probe the underside of the board for the potentiometer resistance AS SET.OK so I blew it on the TV repair shop recommendation. Sue me.LAPTOP repair places, reputable ones, can solder the new pot in place, or the wires that lead to a remote pot. I do not trust myself to do it, my hands, eyes, and coordination are all too flaky to risk it.Preset the replacement pot with the same resistance setting as what you found when you probed the out of the box pot. Tell the tech keep hands off - he has no reason to fiddle with it.It is unreasonable to expect that this PSU unit to be vastly inferior to the higher priced PSU. But the fan is another question. It probably is garbage. I'm not even going to TRY and use the OEM fan. Dracula attacks! The fan gets hurled out the back window. On top goes a real brushless ball bearing fan. Sealed to the case with GOOP. Oooooo look I made a mistake! Somehow a thicker, higher CFM fan managed to find it's way up there. I may even glue a 5 volt micro fan inside using a 5-volt regulator. Chinese play monkey-see-monkey-do with designs. There is so much espionage stealing, I'm surprised speeding automobiles do not smack into each other between factories.While inside the unit, draw a rough diagram noting every electrolytic capacitor, it's capacitance and voltage values. This is where our little Chinese buddies are likely to cheat. Off brand to MeanWell, I suspect soy sauce capacitors are the weak link in these critters.Use a MAGNIFYING GLASS plus strong reading glasses, and a strong light source to trace both positive and negative circuit traces backwards from the 12 volt output terminals. Look for solder voids and points that look like globs of aluminum paint. The laptop repair guy can fix shaky looking solder joints when he is doing to pot job.

eTopxizu (cheapowatt) 30 amp power supply Guinea Pig

MEXICOWANDERER
Explorer
Dec 09, 2014
Look at the Megawatt sheet, it's the same aminal

. The vendor is looking for his own niche market. Fifteen bucks less, but note carefully the unit costs one lousy cent less than what qualifies for "free" shipping. Gotta send them a message and rattle their cage. If the vendor is outside California prunepickers save on sales tax. Vendors would rather not refer to the gizmos as "battery chargers" they envision some 18-year old connecting one to his beater Subaru and using it as a jump starter.
jrnymn7
Explorer
Dec 09, 2014
I can't find a spec sheet for that unit anywhere in the ad?
MEXICOWANDERER
Explorer
Dec 09, 2014
Batter Up!
My neighbor just begged me out of one of the Topiczoo cheapowatts to power his garden and wakway LEDs. And here I just ordered one of the bigger Megawatts yesterday. Shoot wire can glow but it's tough to burn down a concrete hotel.
NinerBikes
Explorer
Dec 07, 2014
landyacht318 wrote:
It would be interesting to see the internals of the Genssi and megawatt side by side.

Hard to know what one is getting until it arrives.

Need a Genssi guinea pig. Who feels lucky?

I'm tapped out... the MegaWatt is still doing admirably. Someone new needs to step up and brazenly go where no other Woodall's poster has gone before.

Someone needs to step up and order here!!!!
landyacht318
Explorer
Dec 07, 2014
It would be interesting to see the internals of the Genssi and megawatt side by side.

Hard to know what one is getting until it arrives.

Need a Genssi guinea pig. Who feels lucky?
MEXICOWANDERER
Explorer
Dec 07, 2014
Re-read the spec sheet not the ad. The thing will adjust higher. Ya think MEGAWATT has it's own factory in China dedicated just to sell to Megawatt? This is the same OEM. Study carefully images of the Mega and this unit.
NinerBikes
Explorer
Dec 07, 2014
MEXICOWANDERER wrote:
Read this first. A search term on AMAZON.COM

Click on the MORE DETAILS and read the extended information, all of it, por favor.

Genssi 350W LED Power Supply Regulated 12V AC-DC 29A Heavy Duty

This unit is 10-13v, not going to be of much assistance charging batteries when you need 15.3 to 16.0V at times for top charging or equalization charging. You need 13.2 to 13.4 to float AGMS' and 13.8 for open cell wet LA batteries.
jrnymn7
Explorer
Dec 06, 2014
Looked at specs, but not sure what I should be focusing on?

What I did notice was they claim it's better than crappy chinese made units. But the label clearly says made in china.
MEXICOWANDERER
Explorer
Dec 06, 2014
Read this first. A search term on AMAZON.COM

Click on the MORE DETAILS and read the extended information, all of it, por favor.

Genssi 350W LED Power Supply Regulated 12V AC-DC 29A Heavy Duty
jrnymn7
Explorer
Dec 06, 2014
Mex, Is what you did easily scalable, or would having say 4 of these cheapos in parallel cause too many issues?

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eTopxizu (cheapowatt) 30 amp power supply Guinea Pig

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