I'd like to revisit a thread from early February where we were discussing
Enphase microinverters going off line due to utility power quality issues
when Pinging of smart meters occur.
I have a system where I was told by Enphase that they applied their software
fix in late March, but in this
Hi Drake,
The Sunny Island System runs at 48 V nominal so I don't believe 250.162(A)
applies. We have some really savvy inspectors in the Bay Area and they were
happy for us to be ungrounded since we're operating at 48 V. Yes, the
actual voltage might go above 50 V when charging but I believe
Wrenches,
A customer in Mexico wants to start with about 10kW PV. They have a 225 kva
transformer supplying 220/127 volt 3-phase to the property. They are adding
buildings/roof space in several stages over the next 4 years and want to grow
the installation to 120kW of PV solar power.
Hi August;
250.162(A) says operating at greater than 50 v, which a 48 v nominal
system operates most of the time at over 50 v, at least when solar
charging and/or selling back.
We used to get dinged many years ago for using breakers rated at 50v dc
on 48 v systems. John Wiles used to insist
Dave,
The problem occurs when the kWh meter sends data. I would expect any
neighbors' meters on the same transformer to cause trouble. And probably
neighbors that are not on the same transformer too.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com
t: 541-568-4882
On
Dave,
In multiple conversations about this with both the utility and Enphase
there was concern about high inductive loads, possibly from the paper
mill in the town, that turned out not to be the case. The fix Enphase
developed worked, but I thought it would be worth mentioning.
Daryl
Dave,
Hi Larry,
Enphase is supplying microinverters into Mexico and supporting the 127/220
applications. We have hundreds of installations installed at this voltage
now. Feel free to contact me off-line, and I would be happy to discuss the
details.
On Mon, Apr 15, 2013 at 1:25 PM, Larry Crutcher,
Larry
I believe that APS ( Bluefrog http://bluefrogsolar.com/aps-inverters)
micro inverters can be adjusted down to 180 VAC, so they should work line
to line in your application. I know that their spec sheet and manual do not
indicate that, but I have installed them in adjusted for a 208 VAC and
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