[RE-wrenches] Xantrex XW 6048A unregulated during charging

[Jason Lerner]

Hi there,

I mostly install Outback and this is one of the few XW systems I have worked on,  and all of them have had similar problems. That is the maddening thing,  that I also have been through every set point multiple times,  everything is dialed in,  and saved, and still I worry that replacement of the brand new battery pack will be on me.

Hard to imagine we are the only ones out there who have experienced it.

Thanks for your advice.

Jason


> On May 4, 2017, at 3:35 AM, John <john.blittersdorf at gmail.com> wrote:
> 
> Jason, 
> I had a similar problem with an XW 6048 but the overcharge happened on AC1 input.  One xantrex tech told me the battery bank was too small.  I had 8 L16's 6 v 360 ah. I reset to factory defaults and asked them many times why the voltage raced up to 64v when set at correct absorption voltage.  After a year, a blown battery and finally a full replacement of the battery bank (now maximum storage) and a full day going thru every set point after setting to factory defaults, I found the default setting for absorption was for 6 hours!  After setting that to zero, things settled down and I could actually tweak the max current settings to stabilize the system.  Even with the new batteries it was still a very touchy adjustment to keep everything under control.  My takeaway,  stick with Outback. 
> 
> Sent from my iPhone
> 
>> On May 3, 2017, at 7:20 PM, Dave Angelini Offgrid Solar <offgridsolar at sti.net> wrote:
>> 
>> Hmm. This does not sound good! Three phase power correct? You could try
>> connecting a different inverter to the generator.
>> Are you sure the generator is staying connected and outputting qualifying AC?
>> There are set-points for bulk and absorb and they are the same right?
>> 
>> Dave Angelini Offgrid Solar
>> "we go where powerlines don't"
>> http://members.sti.net/offgridsolar/
>> e-mail  offgridsolar at sti.net
>> text 209 813 0060
>> 
>> 
>>> Hello All,
>>> 
>>> I’m working on a system with 3 Xantrex XW 6048’s that has grid on AC1
>>> and a 20 kw generator on AC2.  When charging from grid it regulates during
>>> an absorption charge at 58.2 where it should.  When charging from AC 2 -
>>> generator, the battery Voltage rises above 62 VDC,  but not every single
>>> time.  All the settings are correct, EQ is turned off, and if it
>>> accidentally got turned on is set at the same Voltage as the absorption
>>> setting.  Customer has a brand new 33 kWh AGM battery bank,  that I would
>>> rather not fry.  This is a battery backup system with no PV.
>>> 
>>> I have checked all the temperature sensors (they seem good) and tried
>>> charging with them plugged in,  and with them unplugged and it doesn’t
>>> seem to change the situation.
>>> 
>>> Has anybody else seen this happen before?  Any suggestions?
>>> 
>>> Thanks very much,
>>> 
>>> Jason Lerner
>>> Waldron Power and Light Co.
>>> (888) 927-2526
>>> 
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>> 
>> 
>> 
>> Dave Angelini Offgrid Solar
>> "we go where powerlines don't"
>> http://members.sti.net/offgridsolar/
>> e-mail  offgridsolar at sti.net
>> text 209 813 0060
>> 
>> _______________________________________________
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