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

[Dave Angelini Offgrid Solar]

On Schneider gear if you program the bat capacity to zero, the unit will
run the full absorb time. If you had a 1000 AH bank programmed, at 2% of
the 1000 ah or 20 amps into the battery the unit will go to float. I do
not see this as your problem though!
--Dave

> Hello Kevin,
>
> I have actual battery capacity of 670 ah’s programmed in.  Do you have
> any theories on why 0 ah’s was helpful??
>
> Swapping AC1 and AC2 is a really good idea.  The only problem is since I
> put in a micro SD card to the Combox, to do extended logging,  I have not
> been able to reproduce the problem that was easy to reproduce a month ago.
>  Only thing that has changed is the weather has warmed up.
>
> Schneider tech support has been helpful with suggestions,  but they will
> not pay to replace the battery bank…..
>
> Jason
>
>> On May 4, 2017, at 9:42 AM, Kevin Pegg <kpegg at energyalternatives.ca>
>> wrote:
>>
>> This is a good one. What battery capacity have you programmed into the
>> XW system? We have had a few issues, though not this one specifically,
>> but similar head-scratchers that were resolved by setting the battery
>> capacity to 0 Ah.
>>
>> Have you tried swapping AC1 and AC2 and does the problem follow the
>> source or the input?
>>
>> I recently had an odd issue with generator automation on AC1 on an XW+
>> and Schneider tech support was helpful in replicating the issue in their
>> lab and issuing a fix. Might be worth engaging them if you haven't
>> already.
>>
>> Kevin
>>
>> -----Original Message-----
>> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
>> Behalf Of Jason Lerner
>> Sent: May-03-17 3:18 PM
>> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>> Subject: [RE-wrenches] Xantrex XW 6048A unregulated during charging
>>
>> 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"
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