[RE-wrenches] More Sunny Island power problems

[William Miller]

Mac:

 

I will review the data.  Thanks!

 

William

 

Gradient Cap_mini
Lic 773985
 <http://www.millersolar.com/> millersolar.com
805-438-5600

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mac Lewis
Sent: Friday, August 15, 2014 9:46 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] More Sunny Island power problems

 

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

 

 

Gradient Cap_mini
Lic 773985
millersolar.com <http://www.millersolar.com/> 
805-438-5600

 


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