[RE-wrenches] More Sunny Island power problems

[Mac Lewis]

William,
As far as I understand, the communication is supposed to take away the need
for frequency shift. Have you pulled the data off of the Sim card and
looked for frequency shift?
On Aug 15, 2014 10:24 AM, "William Miller" <william at millersolar.com> wrote:

> Friends:
>
>
>
> A Sunny Island mini-grid system I am maintaining also does not play nice
> with a UPS unit.  So much so that the system reportedly fried a Furman UPS
> unit yesterday!
>
>
>
> This should not be!  The UPS unit is supposed to protect downstream
> equipment and should be able to protect itself as well.
>
>
>
> I need to rent some high quality power monitoring equipment to monitor
> voltage, frequency and distortion.  I need one three phase unit in the
> power building and I need something more compact for the AV equipment
> room.  Does anyone have a recommendation for models that might work in this
> scenario?
>
>
>
> The thought occurred to me that the system by which the Sunny Island
> varies line frequency may be problematic for sensitive electronics.  I have
> connected the Sunny Island master to the Sunny Boys with RS485 and
> programmed the Sunny Boys for off-grid.  Can this allow the two systems to
> communicate to regulate PV charge without relying on frequency shifting?
>
>
>
> Thanks in advance.
>
>
>
> William
>
>
>
>
>
> [image: Gradient Cap_mini]
> Lic 773985
> millersolar.com <http://www.millersolar.com/>
> 805-438-5600
>
>
>
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