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

[John]

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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