On grid w/battery and MPPT [RE-wrenches]

[Drake Chamberlin]

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Hi Travis,

I have seen that done before.  Although I did not monitor the system 
personally, the electrical engineer that owned it claimed that it helped.

Drake


At 02:20 PM 5/29/02 -0500, you wrote:
>Christopher and others,
>
>I had this idea several years ago and wondered what you thought about it.
>Assuming one was to use a grid tie battery based inverter and 6 volt
>batteries.  Instead of the standard battery bank that floated @ 53.6 volts,
>use a battery bank that floated @ 59.6 by adding one more 6 volt battery.
>This also assumes that you can appropriately adjust the parameters of the
>float and bulk voltages.  Would this system produce more kWh's annually
>since you were running the array closer it's maximum power point?  I see
>that I can adjust the Float and Bulk voltages on my SW4048 up to 64.0.
>
>Travis Creswell
>Ozark Energy Services
>----------
> >From: Christopher Freitas  -  OutBack Power <cfreitas at outbackpower.com>
> >To: RE-wrenches at topica.com
> >Subject: RE: On grid w/battery and MPPT [RE-wrenches]
> >Date: Wed, May 29, 2002, 11:51 AM
> >
>
> >Even in the alternate universe called California the performance of a
> >system without MPPT will be different if the batteries are located in a
> >conditioned space versus an exposed location as in Bill Brooks example.
> >
> >
> >Another factor affecting the performance will be the nominal system
> >voltage - a 48 vdc system will benefit more from a MPPT than a 24 vdc
> >system for several reasons, which we can discuss more if people are
> >interested...
> >
> >I am very interested in seeing performance comparisons testing of
> >products by a third party - as long as the raw data is made available
> >for review and a way to publicly comment on the results is provided
> >(hint-hint).
> >
> >Christopher Freitas
> >OutBack Power Systems, Inc.
> >cfreitas at outbackpower.com  www.outbackpower.com
> >Tel 360 435 6030  Arlington WA USA
>
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