[RE-wrenches] Xantrex XW6048 (quad) blowing past setpoints

[Jason Szumlanski]

Inverter charging from generator input. I have each inverter set to 22A
charge rate and 57.6 for bulk and absorb, no equalization (although the eq
voltage is also set to 57.6V just in case).

No solar at this time (yet!).

I do have one other piece of information I just discovered. Two of the four
inverters are reporting the battery voltage about 0.8V lower than the other
two. I think this might be my issue. At rest two of the inverters show the
battery voltage as 53.4V, which is the correct voltage as measured on my
meter and on the battery BMS display. The other two inverters show 52.8V
and 52.7V in the Combox diagnostics. I'm now thinking these two
inverter battery voltage readings are the issue. Is there a way to
calibrate the XW battery voltage readings? I suppose I could disable the
chargers on these inverters, but that is not a permanent solution if that
is found to be the issue.

Jason



On Mon, Mar 25, 2019 at 5:05 PM Darryl Thayer <darylsolar1 at gmail.com> wrote:

> Is the chargingfrom the inverter orfrom a solar source?
>
> On Mon, Mar 25, 2019, 3:35 PM Jason Szumlanski <
> jason at floridasolardesigngroup.com> wrote:
>
>> I have four inverter/chargers (master and 3 slaves) that are blowing past
>> their 57.6V setpoint that I programmed and confirmed via the Context
>> Combox. They are hitting 58.4V and tripping the battery management units on
>> a set of Lithium Batts. Any ideas why this would happen? I can disable
>> chargers on individual units, so I know the settings are getting uploaded
>> via the Combox.
>>
>> Jason Szumlanski
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