ST2500 monitoring [RE-wrenches]

John Raynes john at raynes.com
Wed Jul 10 12:37:11 PDT 2002


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At 12:55 PM 7/10/02 -0700, you wrote:
>From: Joel Davidson <joeldavidson at earthlink.net>
>Subject: ST2500 monitoring [RE-wrenches]
>
>Does anyone make a data monitor that will work on a PV system with 3
>ST2500 inverters feeding into one service panel? To use my customer's
>words: "My friend has the Sunny Boy computerized monitoring system and
>it sure works slick.  It makes it a lot easier to monitor than going
>outside, opening my large electrical box and looking at the analog meter
>that I had installed.  With his system he can look at each array for
>trouble shooting and maximal performance. While I can do this at the
>pole it is still inconvenient.  I know that that the XR model allows
>this monitoring but since I have the ST 2500 this is not an option. Are
>you aware of a monitoring system that will monitor the individual arrays
>and have a computer link to access and monitor the data?"

Joel,

To my knowledge, there are few if any drop-in packages.  Most folks that I 
know that do this type of monitoring (myself included) build a system up 
from scratch using Campbell Scientific CR10X's or something similar.  It 
always costs more to tack on a DAS outside the inverter, as opposed to the 
SB's built-in capability, because there's duplication of sensors and 
instrument circuits.  And the Campbell units don't come with a slick 
interface, although the computer links to retrieve data, either locally or 
remotely, are certainly there.

Cost can vary all over the map, depending on exactly how much you wish to 
monitor.  But it definitely can be done.  Contact me off list if you'd like 
to talk about this further.

Regards,

John Raynes
Principal Engineer
Raynes Engineering, Inc./RE Solar
Sandy, UT

Phone:  801-569-2400
email:          john at raynes.com
Web site:       www.raynes.com

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