[RE-wrenches] Outback Voltage Spikes?

[Darryl Thayer]

Hello all, I work with speed drives, they are an inverter, an abrupt change
in load will result in a voltage spike.  I have never measured or even
tried this event on an FX inverter but it would not surprise me.  The
inverter is taking load charging the battery then it changes to supplying
load from the battery.  Perhaps a ramp to load would prevent this from
happening.  Magnum used to have an AC dump load controller.  Also check
with Midnight as to a MOV that clips at 260 volts?

On Tue, Mar 19, 2019 at 8:25 AM <drake.chamberlin at redwoodalliance.org>
wrote:

> Hello Wrenches,
>
> We have an Outback VFX3648 inverter AC coupled to a Stirling Generator. We
> use an Outback autotransformer to  get the 240 V needed to match the
> Stirling. The Stirling generator must run continuously, as it is difficult
> to start up after a shut down.
>
> The system works flawlessly for many hours. At some point, usually when
> the dump load kicks on, the generator shuts down on a high voltage error.
> High voltage is about 264 V. We have never seen voltage that high on the
> system.
>
> We replaced the control board on the inverter, and the output voltage
> appears very stable. The Stirling people say that the Outback must be
> putting out high voltage spikes that are so brief that we will not be able
> to see them with a voltmeter.
>
> Can an Outback inverter create such spikes?
>
> Thanks,
>
> Drake
>
>
>
>
>
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