Battery charging with XW series equipment [RE-wrenches]

[Drake Chamberlin]

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Is there any chance that Xantrex could be persuaded to rework the old 
SW Series?  It was almost the inverter we needed, with a few 
maddening glitches.  An updated FET board, better grid tie interface, 
and silent sell, and it could be the inverter we have been waiting 
for.  Maybe we could think of a few more rubs to address, such as a 
user friendly DC box.

Drake

At 02:59 PM 7/9/2008, you wrote:

>Colleagues:
>
>We installed our first XW system recently and it has caused some 
>questions and consternation.  The client is very technically 
>inclined (he owns a small telephone company) and has graciously 
>agreed to work with us to familiarize with the equipment.  Here is a 
>list of question/concerns:
>
>1.      The 24 IBE batteries we have do not appear to be receiving a 
>full charge.  At-rest voltage caves quickly at sundown to 48 or 
>less.  I have observed the two-stage charge cycle performed by the 
>XW charge controllers and I wonder if this is really superior to 
>three stage charging.  Comments?
>
>2.      The charge routine performed by the XW inverter is also 
>suspect.  Apparently there is no way to require a specific 
>absorption duration.  According to tech support, the absorption 
>timer is simply a maximum timer and that absorption ends when the 
>charge tapers down to 2% of the battery AH value.  We see the 
>generator auto start and then shut off in about an hour.  For a 1600 
>AH battery bank, this seem too short a time frame to really get a 
>full charge.  Should we increase the absorption voltage?? Comments?
>
>3.      The programmed variables for a number of the functions were 
>blank.   For example, the generator voltage start numbers (for 24 
>hour, 2 hour, etc) were not empty.  This puts a lot of pressure on 
>the installer to insert parameters where one would usually find them 
>already programmed.  The possibility is high that the installer 
>might miss an important parameter and have to drive back just for 
>programming.  I thought that the default parameters for the SW were 
>excellent and I encourage Xantrex to pre-program with these 
>values.  It may be also that I have older software and the new 
>software has these values?
>
>4.      What is the difference between newer version of the software 
>and the older versions?
>
>Your replies are much appreciated.


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