I just wanted to follow up on one thing about the kohler DC gensets.
I talked to my genny buddy about the Kohler and he said:
The voltages are adjustable. On the 24v unit, from 24 to 33v.
It also tapers the current down to around 40 amps, from a peak of 222.
thanks,
jay
peltz power
...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Wednesday, March 06, 2013 8:20 PM
To: RE-wrenches
Subject: [RE-wrenches] DC generators
I just wanted to follow up on one thing about the kohler DC gensets.
I talked to my genny buddy about the Kohler
I never recommend trying to fully charge with a generator anyway: its
too fuel inefficient. A good 4 hour bulk charge from 50% back to 80%
SOC, and then hope the sun shines again. I usually set the voltage on
the high side (they usually run the it in the winter), and program the
run time to
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 Im not normally on board with the DC genset idea, that i
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
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
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
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
-
From: Allan Sindelar al...@positiveenergysolar.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Tue, Mar 5, 2013 16:41:39 GMT+00:00
Subject: Re: [RE-wrenches] DC generators
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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
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.
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,
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
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