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It seems a little vague on that point. Talking to Fronius tech support
did not produce a definitive answer. I think so long as the system is
basically grid tied, it likely wouldn't. In the webinar, the presenter
said that Fronius wasn't worried about the AC relay being switched on and
off by the process of AC coupling. I wouldn't design an off grid system
around a Fronius. <br><br>
At 06:49 PM 5/27/2013, you wrote:<br>
<blockquote type=cite class=cite cite="">Maybe their position has
changed, but the last time I looked into AC coupling a Fronius inverter I
was told by Fronius that it would void their warranty. Has that policy
changed?<br>
<br>
Regards,<br><br>
Gary Willett<br>
Icarus Engineering LLC<br><br>
On 5/27/13 3:48 PM, Drake wrote:<br>
<blockquote type=cite class=cite cite="">I also saw that webinar. We had
just coupled a Fronius 10K to a pair of Sunny Islands. It seems to
be working fine. It is a backup system, so we have only tested it.
SMA tech support assured me it would work before we bought the
system. <br><br>
Is the Outback wave form unique in any way, causing the Magnum have
issues? Is the Sunny Island wave form cleaner?<br><br>
At 04:01 PM 5/26/2013, you wrote:<br>
<blockquote type=cite class=cite cite="">Hi Jeremy,<br><br>
FYI: I heard that Fronius is the most sensitive of the GT inverters
and so the most difficult to "fool" or keep on in an AC coupled
system. That was from the Magnum AC Coupling webinar.<br><br>
Blessings,<br>
Kelly<br><br>
Kelly Larson<br>
Electrical Engineer<br>
NABCEP Certified Solar PV Installation Professional<br>
ISPQ Master Trainer<br>
CA Electrical Contractor# 868189<br><br>
<br>
On May 25, 2013, at 6:52 AM, All Solar wrote:<br><br>
<blockquote type=cite class=cite cite="">Hope everyone is enjoying their
weekend!<br>
I have a system where we have Installed a pair of XW inverters along with
a 10k Fronius inverter. <br>
We have been told that we need to limit the PV watts to the lowest XW
inverter. We have XW capacity in excess of the array, so why can't they
entire array feed the system when the grid is down?<br>
Of course tech support is tougher when you use different brand names, but
I'm sure this has been done in the field already.<br>
Please contact me off list If you can help us out. The customers
electrician on this job has been trying hard to figure it out, but I
think he might be in too deep!<br><br>
Jeremy Rodriguez<br>
All Solar<br>
CO. USA<br><br>
<br>
Sent by Jeremy's iPhone. Sorry for typos and shorthand!<br>
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