Re: [RE-wrenches] DC generators

2013-03-05 Thread Chris Mason 
" I think that's too much current for any charge controller."
Why use a charge controller? Surely the idea is to provide a bulk charge
facility for emergency where the solar resource is not sufficient.
Couldn't you use start/stop control to get the batteries to, say, 80%
charge then shut it down? A simple voltage based controller could close a
contact to start and stop the generator.


On Tue, Mar 5, 2013 at 12:42 PM, Allan Sindelar <
al...@positiveenergysolar.com> wrote:

>  Rated 111A at 54 VDC; 222A at 27 VDC. I think that's too much current
> for any charge controller.
> So close and yet so far...
>
> Allan
>
>  *Allan Sindelar*
> *al...@positiveenergysolar.com* 
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder and Chief Technology Officer
> *Positive Energy, Inc.*
> 3209 Richards Lane (note new address)
> Santa Fe, New Mexico 87507
> *505 424-1112*
> *www.positiveenergysolar.com* 
>
> *
> *
>
>  On 3/5/2013 9:27 AM, Dan Fink wrote:
>
> Run the 54vdc generator output through a Midnite Classic, Outback FX, etc?
>
> Dan Fink,
> Executive Director;
> Otherpower
> Buckville Energy Consulting
> Buckville Publications LLC
> NABCEP / IREC accredited Continuing Education Providers970.672.4342
>
>
>
>
> On Tue, Mar 5, 2013 at 9:14 AM, Allan Sindelar 
>  wrote:
>
>  Jay,
> If this is the unit I think it it, it has been discussed and rejected on
> this list in previous threads. It has been around for years, although the
> model appears to have been upgraded, as it's now variable speed 2,300-2,900
> rpm.  The primary issue, if I recall, is that at 54V (on 48V nominal) the DC
> output voltage is too low for our purposes and is not adjustable.
> So close, and yet so far... if anyone has learned that this has changed,
> please let this list know.
> Allan
>
> Allan sindelaral...@positiveenergysolar.com
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder and Chief Technology Officer
> Positive Energy, Inc.
> 3209 Richards Lane (note new address)
> Santa Fe, New Mexico 87507505 424-1112www.positiveenergysolar.com
>
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-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
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Re: [RE-wrenches] DC generators

2013-03-05 Thread James Jarvis 
The Polar Power units have variable output charging. Lots more smarts 
than just float charge. Very good integrated automatic generator 
starting and stopping. Our customers haven't been very impressed with 
the super capacitor for starting.


-James Jarvis
APRS World, LLC

On 03/05/2013 11:29 AM, Kent Osterberg wrote:

Polar Power makes a couple generators with similar features:

http://www.polardcmarine.com/polarpower/products/dc-generators/8220d-950p/
http://www.polardcmarine.com/polarpower/products/dc-generators/8220k-972/

I haven't check to see if the output voltage is adjustable, or suitable
for charging batteries in renewable energy systems. Considering the
market for these, the normal unit is probably set up to provide a float
charge voltage.

Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com


-James Jefferson Jarvis
APRS World, LLC
+1-507-454-2727
www.aprsworld.com
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Re: [RE-wrenches] DC generators

2013-03-05 Thread Larry Crutcher, Starlight Solar Power Systems 
Jay,

Two big issues I have with these is no current regulation and a fixed, 2.25V 
per cell output voltage. If a flooded battery bank is at a low SoC, the over 
current can cause damage. For AGM's this would be fine, though. The low charge 
voltage means very long charge time and wasted fuel. This could have much 
appeal to me if these two issues were fixed/changed.

Larry Crutcher
Starlight Solar Power Systems




On Mar 5, 2013, at 8:17 AM, jay peltz wrote:

HI All,

I know many of you like this concept.

I was just made aware of a new product from Kohler.

Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
looks pretty good, I understand it was made for the telecom industry.

And while I"m not normally on board with the DC genset idea, that i can get 222 
amps from 6kw at 24v is very appealing.

http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current

Cheers,

jay

peltz power



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Re: [RE-wrenches] DC generators

2013-03-05 Thread Kent Osterberg 

Polar Power makes a couple generators with similar features:

http://www.polardcmarine.com/polarpower/products/dc-generators/8220d-950p/
http://www.polardcmarine.com/polarpower/products/dc-generators/8220k-972/

I haven't check to see if the output voltage is adjustable, or suitable 
for charging batteries in renewable energy systems. Considering the 
market for these, the normal unit is probably set up to provide a float 
charge voltage.


Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com


On 3/5/2013 7:17 AM, jay peltz wrote:

HI All,

I know many of you like this concept.

I was just made aware of a new product from Kohler.

Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
looks pretty good, I understand it was made for the telecom industry.

And while I"m not normally on board with the DC genset idea, that i can get 222 
amps from 6kw at 24v is very appealing.

http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current

Cheers,

jay

peltz power



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Re: [RE-wrenches] DC generators

2013-03-05 Thread Me 
The way i always do DC gen sets is to run through rectifier directly to batt 
buss with fuse. Use parallel dump load controllers to account for batt charge 
protection. Works real well and is pretty bullet proof and reliable.

RoyR

Sent via DroidX2 on Verizon Wireless™

-Original message-
From: Allan Sindelar 
To: RE-wrenches 
Sent: Tue, Mar 5, 2013 16:41:39 GMT+00:00
Subject: Re: [RE-wrenches] DC generators

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Re: [RE-wrenches] DC generators

2013-03-05 Thread Allan Sindelar 

  
  
Rated 111A at 54 VDC; 222A at 27 VDC. I
  think that's too much current for any charge controller.
  So close and yet so far...
  Allan
  
  


Allan Sindelar
al...@positiveenergysolar.com
  NABCEP Certified Photovoltaic
Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder and Chief Technology Officer
Positive Energy, Inc.
3209 Richards Lane (note new address)
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com



 
  On 3/5/2013 9:27 AM, Dan Fink wrote:


  Run the 54vdc generator output through a Midnite Classic, Outback FX, etc?

Dan Fink,
Executive Director;
Otherpower
Buckville Energy Consulting
Buckville Publications LLC
NABCEP / IREC accredited Continuing Education Providers
970.672.4342




On Tue, Mar 5, 2013 at 9:14 AM, Allan Sindelar
 wrote:

  
Jay,
If this is the unit I think it it, it has been discussed and rejected on
this list in previous threads. It has been around for years, although the
model appears to have been upgraded, as it's now variable speed 2,300-2,900
rpm.  The primary issue, if I recall, is that at 54V (on 48V nominal) the DC
output voltage is too low for our purposes and is not adjustable.
So close, and yet so far... if anyone has learned that this has changed,
please let this list know.
Allan

Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder and Chief Technology Officer
Positive Energy, Inc.
3209 Richards Lane (note new address)
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com

  
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Re: [RE-wrenches] DC generators

2013-03-05 Thread Dan Fink 
Run the 54vdc generator output through a Midnite Classic, Outback FX, etc?

Dan Fink,
Executive Director;
Otherpower
Buckville Energy Consulting
Buckville Publications LLC
NABCEP / IREC accredited Continuing Education Providers
970.672.4342




On Tue, Mar 5, 2013 at 9:14 AM, Allan Sindelar
 wrote:
> Jay,
> If this is the unit I think it it, it has been discussed and rejected on
> this list in previous threads. It has been around for years, although the
> model appears to have been upgraded, as it's now variable speed 2,300-2,900
> rpm.  The primary issue, if I recall, is that at 54V (on 48V nominal) the DC
> output voltage is too low for our purposes and is not adjustable.
> So close, and yet so far... if anyone has learned that this has changed,
> please let this list know.
> Allan
>
> Allan Sindelar
> al...@positiveenergysolar.com
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder and Chief Technology Officer
> Positive Energy, Inc.
> 3209 Richards Lane (note new address)
> Santa Fe, New Mexico 87507
> 505 424-1112
> www.positiveenergysolar.com
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Re: [RE-wrenches] DC generators

2013-03-05 Thread Carl Adams 
Very interesting Jay,

A customer just asked me two days ago, if it would be possible to install a
DC Generator to feed his six SunnyBoy 6000s at night.  He was thinking of a
water cooled genny from which he could harvest heat while also providing
power to the inverters.  He said he thought the economics could work with
the current low NG prices, but only during the winter months when he has a
need for the excess heat being generated.

The Kohler you point out doesn't have the voltage specs to match the
SB6000s, but I'd be interested in other thoughts on this approach.

Carl Adams
SunRock Solar

On Tue, Mar 5, 2013 at 10:17 AM, jay peltz  wrote:

> HI All,
>
> I know many of you like this concept.
>
> I was just made aware of a new product from Kohler.
>
> Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
> looks pretty good, I understand it was made for the telecom industry.
>
> And while I"m not normally on board with the DC genset idea, that i can
> get 222 amps from 6kw at 24v is very appealing.
>
>
> http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current
>
> Cheers,
>
> jay
>
> peltz power
>
>
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Re: [RE-wrenches] DC generators

2013-03-05 Thread Allan Sindelar 

  
  
Jay,
  If this is the unit I think it it, it has been discussed and
  rejected on this list in previous threads. It has been around for
  years, although the model appears to have been upgraded, as it's
  now variable speed 2,300-2,900 rpm.  The primary issue, if I
  recall, is that at 54V (on 48V nominal) the DC output voltage is
  too low for our purposes and is not adjustable.
  So close, and yet so far... if anyone has learned that this has
  changed, please let this list know.
  Allan
  
  


Allan Sindelar
al...@positiveenergysolar.com
  NABCEP Certified Photovoltaic
Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder and Chief Technology Officer
Positive Energy, Inc.
3209 Richards Lane (note new address)
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com



 
  On 3/5/2013 8:17 AM, jay peltz wrote:


  HI All,

I know many of you like this concept.

I was just made aware of a new product from Kohler.

Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
looks pretty good, I understand it was made for the telecom industry.

And while I"m not normally on board with the DC genset idea, that i can get 222 amps from 6kw at 24v is very appealing.

http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current

Cheers,

jay

peltz power


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[RE-wrenches] DC generators

2013-03-05 Thread jay peltz 
HI All,

I know many of you like this concept.

I was just made aware of a new product from Kohler.

Kohler 6vsg.  Natural gas or propane, 24, 36,48v dc only
looks pretty good, I understand it was made for the telecom industry.

And while I"m not normally on board with the DC genset idea, that i can get 222 
amps from 6kw at 24v is very appealing.

http://www.kohlerpower.com/industrial/filterresults.htm?categoryNumber=12061§ionNumber=13261&filter_1=Variable%20Speed,%20Direct%20Current

Cheers,

jay

peltz power


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