8-80 volt out CC-CV board on e-bay

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Re: 8-80 volt out CC-CV board on e-bay

Post by amberwolf » Jun 10 2015 2:58am

mcintyretj wrote: 12v144w power supply
I think 150w is near its limit.
I wonder why? ;)
If anyone can get 600w from this unit, I would love to see it.
So would I. :lol:

If you do, please have video running, and fire extinguisher in hand. :P


Seriously, if you want to use your "600W" unit at that wattage, you will need a power source that can supply that wattage (plus the losses in conversions). Using a 144W power source for it won't get you more than 144W, and probalby not even that, without overloading the power source.

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Re: 8-80 volt out CC-CV board on e-bay

Post by altermontrealiste » Jun 10 2015 7:04am

mcintyretj wrote:
Just adjusted the volts to more than 90. Did not want to go higher but might hit 100v.
Thanks mcintyretj ; just convinced me to get one and use it with a dc supply (meanwell, laptop p.s. in series... might even plug in a solar panel directly).

What about putting cheap ones in series / paralel?
http://www.ebay.ca/itm/DC-DC-Step-Up-Do ... 5d3ff079ca

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Re: 8-80 volt out CC-CV board on e-bay

Post by dmwahl » Jun 10 2015 8:41am

altermontrealiste wrote:What about putting cheap ones in series / paralel?
http://www.ebay.ca/itm/DC-DC-Step-Up-Do ... 5d3ff079ca
Unless it's isolated (most cheap ones are not) then you're still limited to the max voltage output of one.

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Re: 8-80 volt out CC-CV board on e-bay

Post by altermontrealiste » Jun 10 2015 8:59am

dmwahl wrote:
altermontrealiste wrote:What about putting cheap ones in series / paralel?
http://www.ebay.ca/itm/DC-DC-Step-Up-Do ... 5d3ff079ca
Unless it's isolated (most cheap ones are not) then you're still limited to the max voltage output of one.
Would a couple of diodes properly isolate them?

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Re: 8-80 volt out CC-CV board on e-bay

Post by DVDRW » Jun 10 2015 10:20am

amberwolf wrote:
If anyone can get 600w from this unit, I would love to see it.
So would I. :lol:
If you do, please have video running, and fire extinguisher in hand. :P
700W no problem! :P
Input 50v.


Input amps is limited ~12A. So 12v is ~140W max

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Re: 8-80 volt out CC-CV board on e-bay

Post by danielrlee » Jun 10 2015 12:57pm

You know it's going to be good when the video starts with a crane shot of a fire extinguisher.

Looks like it'll do the claimed wattage with adequate cooling then. What's the longest you've had it running at that power level? Mounting in a case should improve the airflow considerably.
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Re: 8-80 volt out CC-CV board on e-bay

Post by dmwahl » Jun 10 2015 1:19pm

altermontrealiste wrote:
dmwahl wrote:
altermontrealiste wrote:What about putting cheap ones in series / paralel?
http://www.ebay.ca/itm/DC-DC-Step-Up-Do ... 5d3ff079ca
Unless it's isolated (most cheap ones are not) then you're still limited to the max voltage output of one.
Would a couple of diodes properly isolate them?
No, diodes just prevent flow of electricity in one direction and allow it in the other. Draw a basic circuit with the grounds, input, and output voltages and you'll see what I mean. The ground pins are all tied together, and you're limited to the maximum output voltage of any single module. All a diode would do is generate heat.

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Re: 8-80 volt out CC-CV board on e-bay

Post by amberwolf » Jun 10 2015 1:30pm

DVDRW wrote:700W no problem! :P
Input 50v.
I guess I wasn't really clear, but I was actually referring to the 144W supply that poster was using, which is what I thought he was talking about gettign 600W out of. :oops:

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Re: 8-80 volt out CC-CV board on e-bay

Post by Eclectic » Jun 10 2015 1:49pm

altermontrealiste wrote:What about putting cheap ones in series / paralel?
There was a discussion about this here:
http://endless-sphere.com/forums/viewto ... =3&t=69244
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Re: 8-80 volt out CC-CV board on e-bay

Post by mcintyretj » Jun 10 2015 3:42pm

amberwolf wrote: I guess I wasn't really clear, but I was actually referring to the 144W supply that poster was using, which is what I thought he was talking about gettign 600W out of. :oops:
I have not tried a more powerful supply because at 144 watts in, the plastic parts started to melt.
ebay converter input after 2 years.jpg
ebay converter input after 2 years.jpg (99.63 KiB) Viewed 1363 times
I have a 12v 250w supply laying around that I could use but I will need to figure out a better cooling solution.

DVDRW. I like you setup! Very cool. cheap too.

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Re: 8-80 volt out CC-CV board on e-bay

Post by amberwolf » Jun 10 2015 6:18pm

mcintyretj wrote:I have not tried a more powerful supply because at 144 watts in, the plastic parts started to melt.
That almost certainly means the connection is very poor, and very high resistance. Either the wire or terminals (or both) are oxidized a lot, or the screws are not nearly tight enough to crimp the wires tight against the terminal faces, or the terminal faces are not well-connected to the rest of it.

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Re: 8-80 volt out CC-CV board on e-bay

Post by mushymelon » Jun 11 2015 4:52pm

Change out the speaker wire to some good primary wire.

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Re: 8-80 volt out CC-CV board on e-bay

Post by dmwahl » Sep 08 2015 8:40pm

I bought one of these on ebay to try out, and while they work just fine, the output isn't enabled by default. You have to push a button to turn it on. Could be a good thing for some applications, but I wanted to set it and forget it so I just have to plug in my bike and go.

Ordered one with adjustable pots instead, hopefully that will work better.

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Re: 8-80 volt out CC-CV board on e-bay

Post by meelis11 » Sep 15 2015 4:16pm

dmwahl wrote:I bought one of these on ebay to try out, and while they work just fine, the output isn't enabled by default. You have to push a button to turn it on. Could be a good thing for some applications, but I wanted to set it and forget it so I just have to plug in my bike and go.

Ordered one with adjustable pots instead, hopefully that will work better.
I bought one after seeing this review https://www.youtube.com/watch?v=-kWps5Wpbzo
I cannot find it right now, but I am sure that same author had video where he changed some settings - it had option to turn boost mode immediately on when powering up.

By the way output power is also limited by 10A input limit - at least on my converter (spec says 15A input max limit) - so if using 12V power supply, max charging power is only 120W (2.4A at 50V). Does not help to have 12V 30A power supply if only 10A is usable.

Nice thing is that it is also voltmeter and ammeter - easy to monitor your charging.

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