boB
That is a good point! That is why we use MS Tristar PWM controllers to
PWM the load instead of a Bang on/off load control from a relays.
It seems to work much better because of the rapidly changing input
from the wind turbine. The Tristar seems fast enough to respond well
in a coupling application for load management.
The Xantrex C-60 do not works as well. Of course that is all for
nothing if the grid is weak.
Logan
On Apr 19, 2009, at 11:41 -Apr 19, boB Gudgel wrote:
Mark Dickson wrote:
>> the array output climbs above 3000 or so watts, we continually
get a “State 108” code and shut down cycles each time a relay trips
on a diversion load...
Sounds to me like your diversion load may be too small and/or the
grid is weak at the Fronius end. When the diversion loads suddenly
go away due to
their "relays tripping", the Fronius', having lots of power to sell,
raising the AC grid voltage right out of the UL1741 / IEEE Voltage
window limit (132V ?).
It hen has to shut down and disconnect in order to stop the apparent
islanding condition. That's probably what state 108 is trying to
tell you ?
Looks like your Fronius inverter is most likely working just fine ?
boB
Larry,
I am having a somewhat similar problem with a recently installed
IG5100. I have it installed in conjunction with an Outback battery
based system for AC coupling. We have it set up to divert its loads
to an electric ice melter and then to a large electric heater as
the battery voltages climb. A third relay cuts the array power
between the Fronius and the AC panel if the battery voltage
continues to climb to unsafe levels.
When we have heavy sunshine and low house loads (second home) and
the array output climbs above 3000 or so watts, we continually get
a “State 108” code and shut down cycles each time a relay trips on
a diversion load. I have worked with both Outback and Fronius (who
have been great!) but at this point we are all baffled. I think my
next step, especially after reading the above post is to replace
the Fronius. Then as a last resort swap the IG5100 out to a couple
of SMA 3000US’s (a 6000US does not configure well with the 28
evergreens).
Any input from you guys would be greatly appreciated!
Mark Dickson
Oasis Montana Inc.
------------------------------------------------------------------------
*From:* re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org
] *On Behalf Of *William Miller
*Sent:* Sunday, April 19, 2009 7:59 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Fronius IG4000 problem
Larry:
We've installed about 20 IG/LV series inverters. Some failures
required only replacement of GF cards, most required replacement
inverters. We've had several DOA when new, one was replaced by
Fronius with a rebuild even when we warned in writing that we would
not accept a rebuild (it had multiple KOs pulled in the chassis --
just not acceptable). As of right now, we have 7 in non-operational
status awaiting replacement. No kidding.
There maybe be one or two that have not failed, but this is offset
by those that have failed multiple times. The biggest failure rate
is of the 6 LV4550s on an exterior north wall 2 blocks from the
beach (http://millersolar.com/Portfolio/Commercial/Voler/
voler.html). These have been replaced three or four times each and
are coming out as soon as we finalize the paperwork, with 3 10K
Plus series inverters going in. This will require extensive rework,
but we are being paid for our time. The Fronius staff has been very
nice, but pretty slow to respond.
I hate to report bad reviews to this forum, but it is what it is.
William Miller
At 02:51 PM 4/19/2009, you wrote:
William,
100% of what quantity? Are there any special conditions that may
have contributed? Were they minor problems?
Larry
------------------------------------------------------------------------
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