[RE-wrenches] Pulsing with AC coupling

[Mac Lewis]

Hi Drake,

Do you have the AC coupling firmware in the Radian?   It should be at
least Required
Firmware 001.006.070

This is a good place to start:
http://outbackpower.com/downloads/documents/appnotes/acc_freq_app_note.pdf

I have seen better results programming the  Freq Shift Response Time to the
lower end ie ~0.05s.

Which micro version is it?  Is it freq/watt capable?

On Tue, Aug 25, 2020 at 10:09 AM <drake.chamberlin at redwoodalliance.org>
wrote:

> P.S. The Radian is set to phase shift, and it reliably shuts off micro
> inverters at set point voltages. The issues occur at lower battery voltage,
> below the set points for the phase shift.
> ---
>
>
>
> On 2020-08-25 11:20, drake.chamberlin at redwoodalliance.org wrote:
>
> The inverter is set to ON not to SEARCH. If the Enphase circuit is
> switched off, the pulsing stops immediately. This system has both AC and DC
> coupling.
>
> In another location, with a Sunny Boy AC coupled with a pair of stacked
> VFX3524  inverters, there is some pulsing in low light conditions. The
> Radian and Enphase combo is much more noticeable.
> ---
>
>
>
> On 2020-08-25 10:42, Jerry Shafer wrote:
>
> Wrenches
> I would think that in time there might be damage. Check to make sure the
> inverter is not on search but I stead "ON", next if you turn off the
> enphase the the outback perform normally. Check the inverter frequency to
> see your frequency is shifting have one that has both AC & DC Coupling and
> no issues.
>
> On Tue, Aug 25, 2020, 6:37 AM <drake.chamberlin at redwoodalliance.org>
> wrote:
>
> Hello Wrenches,
>
> An AC coupled arrangement, with an 8 kW Radian and 8 Enphase
> microinverters, pulses lighting at low levels of array illumination.
> This is generally not too much of a problem.
>
> Under certain levels of solar isolation, the pulsing becomes extreme and
> causes the motors in the refrigerator and air-conditioner to pulse,
> sometimes causing very audible vibrations.
>
> Will this harm the appliances? Is there anything that can be done to
> moderate or stop the pulsing?
>
> Thank you,
>
> Drake
> Athens Electric LLC
>
> --
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-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
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