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Electric Battery-Charger-pSupply
› Charging Station and Power Supply
04-23-2011 06:48 PM  7 years agoPost 81
cdrking

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Seattle

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Mark,

How much does that bad boy weigh? Looks nice.

Jeff

To hover is divine, the alternative is rather PLANE.

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04-23-2011 06:50 PM  7 years agoPost 82
Terrabit

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Seattle, WA - USA

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Very nice! You got me by one MW 1500/24 ps. But unless another software update has increased the output of the PL8, you're still maxing out at 1000W into 6s per unit - which is plenty of course. I limit mine to 25A each when using both PL8's to charge 6x 6s lipos. That gets the job done fast enough for me. The most I've ever charged at is 30A. I find that the main banana plugs begin to get quite hot beyond that. Have heard reports of people melting them.

Very nice setup!

Oh hey, hi Jeff!

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04-24-2011 01:31 AM  7 years agoPost 83
Band1086

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Kennewick, Wa. USA

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I find that the main banana plugs begin to get quite hot beyond that. Have heard reports of people melting them.
Progressive has some that are rated at 40A, and they're on 10g wire. I charge at 40A, so that's all I use anymore

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04-24-2011 02:28 AM  7 years agoPost 84
Terrabit

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Seattle, WA - USA

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I guess I'm gonna have to swing by and see Dave.

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04-24-2011 06:16 PM  7 years agoPost 85
Helicoptaholic

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Ancaster, Ontario, Canada

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Terrabit,

That is true about the wattage max at 1000w at 24V. They choose to market them at 1344W chargers but the max input voltage of 32V must be used. I used some heavy duty banana plugs on mine so it will pump 40A but I never really go over 30A right now. Most of the charging cables available commercially have a maximum of #10 AWG wire size (30A max) and the chargers can put out 40A. Will need to make some custom cables to pump 40A when I get around to it. The 30A cables can handle it but they get a little warm. I have the two power supplies so I can power charge differing cell counts on the separate chargers at 40A, if need be. I hate waiting for packs to charge and my Logo 600 3D doesn't like to be kept waiting either. At the field my bottleneck is still my 1000W Honda generator, but as long as I charge all packs before leaving home, it can still keep up. Unit is quite heavy for lugging around so I use a case with a built in handle and wheels.

Regards,
Mark

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04-24-2011 06:39 PM  7 years agoPost 86
Band1086

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Kennewick, Wa. USA

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That is true about the wattage max at 1000w at 24V. They choose to market them at 1344W chargers but the max input voltage of 32V must be used.
That is incorrect. Check the PL8 specs on Progressives web site here:
http://www.progressiverc.com/index....powerlab-8.html
And the 1344W is based 8S packs charging at 40A:
8S X 4.2V(at full charge) = 33.6V X 40A = 1344W
And it will do this @ 24V as long as your power supply has enough wattage output(V X A = W)
Most of the charging cables available commercially have a maximum of #10 AWG wire size (30A max) and the chargers can put out 40A.
The 30A part of this statement is also incorrect. The 10g wire they use is spec'ed for more. Check the max recommended rating on this silicon 10g wire:
http://www.progressiverc.com/index....ire-10-awg.html

BTW, I charge at 40A all the time with no problem at all. But I use 40A rated banana plugs with 10g wire...

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04-24-2011 08:02 PM  7 years agoPost 87
TJinGuy

rrProfessor

Socorro, NM - USA

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Actually the PL8 will not output 1344 on 24V, I believe it requires 28.5V to do it.

- Chris

Team New Mexico
TJinTech

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04-24-2011 08:12 PM  7 years agoPost 88
Terrabit

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Seattle, WA - USA

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I thought it was at least theoretically possible at 24V but I am inclined to believe Tjin as I respect his authority with electricity.

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04-24-2011 08:17 PM  7 years agoPost 89
Band1086

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Kennewick, Wa. USA

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Maximum charge power capacity: 1344W (@ input voltage > 24V, 500W @ 12V)
OK it says >24V. I have not tested it at 1344 yet because I don't use 8S packs, but I have seen 1100W's(that's incomming to the PL8 though) on my 6S's. I am excited for the time when 14S and 16S power systems will be normal, like 10S and 12S are now.

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04-24-2011 08:20 PM  7 years agoPost 90
Helicoptaholic

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Ancaster, Ontario, Canada

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Band1086,

This was not meant to be a debate on wire size but if you check the appropriate electrical codes, there is no doubt that #10 AWG wire has a max capacity of 30A. The hobby industry does not follow these codes, however, and the wire may become a little hot when pushing 25% more amperage, hence the silicone coating. BTW, @ 32V (the PL8 max input voltage) the wattage being 1344W - 1344 / 32V = 42A output current, with losses = 40A. OHM's Law never sleeps.

Mark

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04-24-2011 08:34 PM  7 years agoPost 91
TJinGuy

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Socorro, NM - USA

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Home codes have much different ends to meet than hobby. If you look at a generic ratings page
http://www.powerstream.com/Wire_Size.htm

You will see that for chassis wiring, 10awg is rated for 55A. The wire we use is silicone covered because it needs to be flexible. It is also extremely high thread count, somewhere between 1000-2000 individual wires are housed in a 10awg noodle wire. So they carry current better than any other type of wire out there. That likely equates to an even higher amperage continuous rating or more like 60-75A.

Edit: And here is some PL8 math

The PL8 is limited to 60A on the input with the V2 firmware.

60A * 24V = 1440W

But the PL8 is only about 85% efficient, so with that input you can only get out about

1440W * .85 = 1225W

To get the full 1344W out you need

1344 / .85 = 1581W
1581W / 60A = 26.4V

Those are the rough numbers. In reality they will all be slightly different.

Also the PL8 is limited to 40A on the output only because of the output connectors and such, not because it can't do more. It's inefficiencies play no part in that limit.

- Chris

Team New Mexico
TJinTech

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04-25-2011 12:46 AM  7 years agoPost 92
Band1086

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Kennewick, Wa. USA

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Sounds good...still though Mark your set up is nothing short of awesome, I'm a little green

Can you power it at the field? If so, what do you use?

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04-25-2011 02:02 AM  7 years agoPost 93
Helicoptaholic

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Ancaster, Ontario, Canada

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Our field does not have AC power so I am using a 1000W Honda Generator. It is adequate and can keep up as long as all my packs are charged at home before I go to the field. One day I may need a bigger Genny, maybe 2000W or a nuclear substation!!

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04-25-2011 02:25 AM  7 years agoPost 94
Band1086

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Kennewick, Wa. USA

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One day I may need a bigger Genny, maybe 2000W or a nuclear substation!!
lol

I've been thinking about this one...

http://www.wisesales.com/EU6500iSA.html

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04-28-2011 01:25 AM  7 years agoPost 95
la528it

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los angeles, ca USA

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I use a hyperion super duo v3.. so 1000W+ was needed. I decided to run two Meanwell SCN 600-24v units in parallel because I had a pair handy... not as elegant as one big supply, but it gets the job done:

Also on display below... I HATE lead acid cells... I live in an apartment, so carrying those bricks from the garage to the apartment was out of the question... instead, I decided to go with LifePo4 cells... 4 cells, about 13v... I now use 60ah versions, and the whole set weighs well less than 20lbs. Add that to the ability to sustain voltage long along the discharge curve, and 3-5 times the cycle life of lead acid, and I think these suckers are perfect!

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04-28-2011 06:37 AM  7 years agoPost 96
HeliMan Dave

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Suburban Chicago

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Band,

That EU6500 is quite a monster. You'd need a pickup truck just to haul it to the field.

I bought this last season from Wise Sales and it seems to be the best balance between size/weight and power:

http://www.wisesales.com/yamaha_ef2000is.html

PS,

Where did you get your 40A rated banana plugs with 10g wire?

Logo 700 / 600 / 500 V-Bar NEO / Blade 180CFX / mCPX BL / Nano / V-Control

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04-28-2011 06:12 PM  7 years agoPost 97
Band1086

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Kennewick, Wa. USA

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That EU6500 is quite a monster. You'd need a pickup truck just to haul it to the field.

I bought this last season from Wise Sales and it seems to be the best balance between size/weight and power:
Dave, yes I'd probably use it at FF's only...plus in my work some. It would be sweet.
I have two Honda 2000i's now that I can link up, and they're working great. I generally only use one at the local field though. But I use them in my work fairly often.
Where did you get your 40A rated banana plugs with 10g wire?
http://www.progressiverc.com/index....arge-cable.html

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04-29-2011 06:17 AM  7 years agoPost 98
HeliMan Dave

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Suburban Chicago

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Quote
That EU6500 is quite a monster. You'd need a pickup truck just to haul it to the field.

I bought this last season from Wise Sales and it seems to be the best balance between size/weight and power:
Dave, yes I'd probably use it at FF's only...plus in my work some. It would be sweet.
I have two Honda 2000i's now that I can link up, and they're working great. I generally only use one at the local field though. But I use them in my work fairly often.

Quote
Where did you get your 40A rated banana plugs with 10g wire?
http://www.progressiverc.com/index....arge-cable.html

ProgressiveRC, Tammies Hobbies, Thunder Power
Ok, you're basically covered generator wise then

Thanks for the progressive link. I didn't know David was carrying all those different charge leads.

Logo 700 / 600 / 500 V-Bar NEO / Blade 180CFX / mCPX BL / Nano / V-Control

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04-29-2011 06:26 AM  7 years agoPost 99
ESWLFSE

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Liberty Hill, TX

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I bought this last season from Wise Sales and it seems to be the best balance between size/weight and power:

http://www.wisesales.com/yamaha_ef2000is.html
I've been considering the same one. What did you pay? They say email for best price....

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04-29-2011 06:37 AM  7 years agoPost 100
HeliMan Dave

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Suburban Chicago

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I've been considering the same one. What did you pay? They say email for best price....
I purchased it almost a year ago. Can't find my receipt right now but I think it was around 900.

Logo 700 / 600 / 500 V-Bar NEO / Blade 180CFX / mCPX BL / Nano / V-Control

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