[RE-wrenches] Xantrex XW system stability

[Eric.Bentsen at schneider-electric.com]

Hi Kevin,
We have found that network (Cat5) cables shorter than 2m (6.5 ft) causes 
network reflections that contribute to network instability in multi-unit 
XW systems. Do not rule out a bad or intermittent network cable either. 
Also, confirm the inverters have the same firmware and the latest.
It is not necessary to have the controllers in-network, but it allows 
Enhanced Grid operation, which does a better job of keeping batteries full 
when 
selling. For off grid, they can be in a separate network if you want to 
monitor them with a dedicated SCP, but you will need to supply network 
power 
for Xanbus (AUX port can be used for this).

Rgds,
_____________________________________________________________________________________ 


Eric Bentsen  |   Schneider Electric   |  Solar Business  |   UNITED 
STATES  |   Technical Support Representative 
Phone: +(650) 351-8237 ext. 001#  |   
Email: eric.bentsen at schneider-electric.com  |   Site: 
www.schneider-electric.com/solar  |   Address: 250 South Vasco Rd., 
Livermore, CA 94551 


*** Please consider the environment before printing this e-mail 




From:
"Kevin Pegg" <kpegg at energyalternatives.ca>
To:
"RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Date:
08/22/2013 10:18 AM
Subject:
[RE-wrenches] Xantrex XW system stability
Sent by:
re-wrenches-bounces at lists.re-wrenches.org



Hello Wrenches, 

Curious how others are finding the stability of larger Xantrex XW 
deployments? We have an installation with 12 Xanbus devices (4 x XW6048, 6 
x XW-MPPT60, 1 x AGS, 1 x SCP) and it keeps crashing. Power cycle the 
whole system and it's fine for a few weeks and then it crashes again. 

I find with smaller deployments under 5 Xanbus devices the stability is 
much better, but still get the occasional customer call with a system gone 
haywire and a power cycle fixes. 

This particular installation is in the high arctic darn near the north 
pole and sending a tech up there next week to resolve. Needless to say, 
it's an expensive ordeal to get up there. 

Kevin


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