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" <cwar...@entech-engineering.com> said:
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.venalai...@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 <cwar...@entech-engineering.com> To: re-wrenches@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-boun...@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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