[RE-wrenches] Schneider 6048 power output fluctuating widely

Sun Jan 25 14:04:23 PST 2015

Hi Chris:

Keeping in mind Todd's comments I'm not sure how your system is set up, 
but if it has Schneider MPPT charge controllers, then it should be set up 
in enhanced sell mode.

Enhanced sell mode coordinates the sell power so that it always matches 
the solar harvest power, moment by moment.  Using that setting will also 
charge the battery with a three stage charging algorithm every morning 
while exporting any excess solar power available which is not needed for 
charging.

Please contact me offline of you would like to go over the settings for 
this mode of operation.

JARMO

_____________________________________________________________________________________ 

Jarmo Venalainen  |   Schneider Electric   |  Solar Business  |   CANADA | 
  Training & Development Specialist - Senior 
Phone: +604-422-2528  |   Fax: +604-420-1591  |   Mobile: +604-505-0291 
Email: jarmo.venalainen at schneider-electric.com  |   Site: www.SEsolar.com 
|   Address: 3700 Gilmore Way, Burnaby, BC V5G4M1 

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

From:
toddcory at finestplanet.com
To:
"RE-wrenches" <re-wrenches at lists.re-wrenches.org>, 
Date:
01/24/2015 10:37 AM
Subject:
Re: [RE-wrenches] Schneider 6048 power output fluctuating widely
Sent by:
"RE-wrenches" <re-wrenches-bounces at lists.re-wrenches.org>

im not sure how the "brand-x" inverters work, but my home system's 
gvfx3648 suffers from high line voltage, where often when selling at max, 
the line voltage at the inverter will creep up to the 130 vac limit. when 
this happens, the inverter doesn't cycle off and on as suggested below, 
but it actually throttles back on selling current to keep the voltage 
below the 130 vac limit. this raises the battery voltage until the charge 
controller throttles back on the incoming pv current to match.

todd

On Saturday, January 24, 2015 8:17am, "Christopher Warfel" 
<cwarfel at entech-engineering.com> said:

Thank you, I will see if that is the solution and get back to either way. 
Chris
On 1/23/2015 3:39 PM, Jarmo.Venalainen at schneider-electric.com wrote:
Hi: 

>From your description of the problem and the video, I suspect the problem 
is due to: 

1. The inverter is exporting very near full power. 
2. The grid voltage rises which at the same AC current results in larger 
export power flow above the inverters limit. 
3. The inverter stops exporting due to reaching its power limit 
4. The inverter again starts exporting..... 
5.  Reaches power limit and stops. 
6.etc....... 

I.E. since the inverter is working close to its power limit on a grid with 
 fluctuating voltage, it goes in and out of max power limit. 

One way to test if this is the cause is to reduce the Sell Amps so that 
you are not operating at the power limit of the inverter. 

JARMO
_____________________________________________________________________________________ 

Jarmo Venalainen  |   Schneider Electric   |  Solar Business  |   CANADA | 
  Training & Development Specialist - Senior 
Phone: +604-422-2528  |   Fax: +604-420-1591  |   Mobile: +604-505-0291 
Email: jarmo.venalainen at schneider-electric.com  |   Site: www.SEsolar.com 
|   Address: 3700 Gilmore Way, Burnaby, BC V5G4M1 

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

From:
Christopher Warfel <cwarfel at entech-engineering.com>
To:
re-wrenches at lists.re-wrenches.org, 
Date:
01/23/2015 12:07 PM
Subject:
[RE-wrenches] Schneider 6048 power output fluctuating widely
Sent by:
"RE-wrenches" <re-wrenches-bounces at lists.re-wrenches.org>

We installed a XW 6048 that has wide power output fluctuations over 
several seconds. Lights flicker, and the inverter squeals. It happens 
multiple times in a minute  The inverter was replaced to no avail.  I 
suspect the local utility's poor line maintenance. When the inverter 
begins to drop off line, the voltage sags from 123 to 117.  This is 
still within normal parameters, so I don't understand why the inverter 
would begin to power down.  Here is a youtube video of it if anyone has 
ever seen this before. Schneider has assisted us several times, but 
cannot find any reason for this happening as a result of their technology.

http://youtu.be/EqMwv44p-lc

http://youtu.be/ADaL-gEbj4w

Thank you, Chris
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