eTopxizu (cheapowatt) 30 amp power supply Guinea Pig

[landyacht318]

For under 23$ and free 2 day shipping, I decided to click 'place order' on this 30 amp MW Clone



I 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.

[MEXICOWANDERER]

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]

I can't find a spec sheet for that unit anywhere in the ad?

[MEXICOWANDERER]

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]

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]

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]

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]

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]

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]

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]

Mex, Is what you did easily scalable, or would having say 4 of these cheapos in parallel cause too many issues?

[MEXICOWANDERER]

Giggles and shrieks of delight are coming from within the box. Voltage balance has to be adjusted at load to within say .08 volt for best results - a piece of cake with the 10-turn pots. Forty six amperes potential is plenty for a single six cell car jar. I am shooting for 100+ amperes potential.

[jrnymn7]

If those things had cc protection, you could easily parallel 2 or 3 of them, for less than a dollar an amp. If only!

Mex, are you saying you've been able to get these things to play nice with each other?

[MEXICOWANDERER]

Caught-cha sneakin' peeks...!

These units do fine as long as total rated wattage is not exceeded.

23.5 amperes @ 14.8 volts (46 amperes for a 44 dollar pair + rectifier)

Set a unit to 13.4 volts and you have a device that will sustain a 26 amp float current.

[landyacht318]

It now appears the eTopxizu "Cheapowatt" is claiming overload protection circuitry.

http://www.amazon.com/Universal-Regulated-Switching-Computer-Project/dp/B00ENFBXQS/ref=pd_cp_pc_0

Or perhaps it always claimed these protections and I did not notice back on page 1 of this thread.

Or perhaps they followed this thread or read some reviews and decided to add the terms to the product description.

And perhaps they added the circuitry necessary to prevent magic smoke release when feeding a hungry battery.

If they did, and it actually limits itself to pre buzzing, pre magic smoke releasing levels, this is quite a deal. Especially if it does a constant current limiting on overload instead of shutting off.

But I won't be trading in my MeanWell.