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› 15V 40+ Amp Power Supply Search
12-29-2009 09:33 PM  7 years agoPost 1
HeliMan Dave

rrVeteran

Suburban Chicago

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Hey guys. I'm looking for the highest output 12-15v switching power supply that will draw 900 watts (or less) to power it. I'm thinking about a small Honda or Yamaha generator which are rated at 1000W (but 900W continuous). I do not want to buy (or lug around) the 2000W or higher generators.

I think the output range would be between 40A and 50A at that voltage. I'd like to get the highest amp supply I can while staying at or less than 900W draw.

I have a 72A 1000W 12V supply but it would be overloading the 900W generator.

Any suggestions?

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12-29-2009 09:53 PM  7 years agoPost 2
TJinGuy

rrProfessor

Socorro, NM - USA

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The 1000W will only overload the generator if you load it too much. If you only use 900W, it is no different than a 900W model.

- Chris

Team New Mexico
TJinTech

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12-31-2009 12:37 AM  7 years agoPost 3
HeliMan Dave

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Suburban Chicago

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Thanks Chris. I don't think there is a way to limit the draw of the power supply I'm using:

<http://cgi.ebay.com/1000W-13-8V-72A...m53dee27c99>;

and so I think it's going to draw the max limit (1000W) (900W rated) limit of the EU1000i Honda generator I'm looking at.

<http://honda.northerntool.com/gener...1000ian.htm>;

That's why I was going to get a slightly smaller power supply. Maybe in the 40-60A range.

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

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12-31-2009 01:22 AM  7 years agoPost 4
whytlotus

rrApprentice

Waukesha, WI 53188

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Do a search for the BK Precision 1692. Adjustable to 15volts and rated at 40amps.

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12-31-2009 02:04 AM  7 years agoPost 5
TJinGuy

rrProfessor

Socorro, NM - USA

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You can easily not draw the full 1000W, you just have to limit your charge currents. What chargers are you using?

- Chris

Team New Mexico
TJinTech

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12-31-2009 04:42 AM  7 years agoPost 6
HeliMan Dave

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Suburban Chicago

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whylotus,

I'd prefer to find a little less expensive PS then the $300.00 BK1692

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

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12-31-2009 04:45 AM  7 years agoPost 7
aussie_g

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Travelers Rest, South Carolina, USA

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just because the 12v power supply is rated at 1000W, does not mean it will pull 1000W as soon as you turn it on.

Gareth

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12-31-2009 04:54 AM  7 years agoPost 8
HeliMan Dave

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Suburban Chicago

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The chargers I'm looking at are:

The new Hyperion "Super Duo" It is due out in March 2010. It has 2 separate charge bays, each being 300W which should charge my 6s 5000mAh packs at up to 2.7C

The second is the 208b i-Charger. It is 350W and will charge my packs at up to approx. 3.1C

I plan to run the power supply at about 15.7V since I might occasionally use my Cellpro 10S charger which is only rated up to 16v input.

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

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12-31-2009 05:03 AM  7 years agoPost 9
HeliMan Dave

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Suburban Chicago

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Thanks aussie g. I know it won't draw that just by turning it on but once I hit "start" on one of these high-output chargers pumping out 10+ amps, I don't want the 1000W power supply to choke the 900W generator.

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

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12-31-2009 05:18 AM  7 years agoPost 10
Dr.Ben

rrMaster

Richmond, VA, USA

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Like a few others here, I don't see that PS pulling 1000W unless you apply a significant load to it. If an applied load pulled the maximum current regardless of how far under 1000W that load happened to be, then you would never see guys doing like I do and running multiple chargers off a single PS of adequate output. The first charger would max the PS out, and then any others would overload it. Clearly that doesn't happen.

I would predict that if you put a meter on the line from the generator to the PS, you'd see a stepped increase in load which would not reach the limit of the Honda 1000 until you had applied a stout load from several chargers running at greater than 1C on high capacity packs. If that is in your plans, then you may indeed want to source a PS that when running at full tilt still does not exceed the generator's capacity.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

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12-31-2009 07:36 AM  7 years agoPost 11
HeliMan Dave

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Suburban Chicago

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Thanks Ben.

Ideally, I'd like to be able to run 2 high-power chargers off the 72A 1000W 15V power supply I already have.

Something like (2) 300W Super Duo's or (2) 350W 208b i-chargers.

Of course at a minumum, I want to at least be able to use (1) super duo which sounds do-able now.

One of the heli guys on HF actually tried (2) 208b's at max power on the same 1000W Honda generator (not sure what power supply) and he said it could not handle them.

Guess I'll just have to pick one charger as I do not want to go any bigger/heavier with a larger generator.

Since I already have a Duo 3, maybe I'll just go for the 208b.

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

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12-31-2009 09:13 AM  7 years agoPost 12
nivlek

rrProfessor

Norfolk England

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If you are going to be running anywhere near the maximum rating of the generator , probably even 50% of it , you will need to use a power supply with an active PFC (power factor correction) circuit .

At the end of the day , it gets dark .

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12-31-2009 01:46 PM  7 years agoPost 13
TJinGuy

rrProfessor

Socorro, NM - USA

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Several things.

Again a 1000W power supply is no different than a 900W in the fact that either is more than the generator can handle. So you are going to have to either do some trial and error or some math to estimate what you can run.

In addition to what Nivlek is talking about, you also never get a 1:1 power input : output form a power supply. Most are 60-80% efficient. So if you want 1000W out, you could be using upwards of 1400W off the AC power source.

In short no matter what you run, you always have to look at more that the simple output numbers. You will have to do some trial and error and maybe some math to estimate how much you can run.

- Chris

Team New Mexico
TJinTech

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01-01-2010 05:36 AM  7 years agoPost 14
HeliMan Dave

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Suburban Chicago

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Ok thanks. I guess, as you say, I'll have to do some trial and error.

I'm sure it won't hurt my generator if it gets overloaded and shuts down once or twice. That will tell me 100% for sure that I need to get a smaller power supply.

Dave

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

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