Funny the timing of the Wrenches list, just Saturday I added some
Enphase inverters to an existing GTB Outback system. The Enphase are
not AC coupled to the Outbacks, as I didn't want to get into the battery
charging issues, and the customer has plenty of PV relative to the
battery size. However, we're having a communication issue as well. I'm
guessing that the Envoy can't be on the Outback side of the system with
the Enphase inverters being on the grid side. So, is there an elegant
solution besides putting the Envoy on the grid side of the system (which
is out in the garage) The whole house is on back up, so no grid direct
circuits are available there, and the wiring is such that it would not
be easy to change that either.
I was actually going to add a transfer switch to the Enphase circuit, so
that in an extended outage, the customer could have the option of
bringing in the Enphase inverters. I have the Enphase breaker in the
Outback Flex 500 box already, so at least that would be simple.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/14/2014 12:49 PM, Nick Soleil wrote:
Hi Benn,
You can remove the microinverters from an Envoy, but it requires a
laptop and a network cable. Call me and we can talk. We have a lot
of big projects with home builders, and I am more than happy to share
our best practices with you. My cell number is 707-321-2937.
On Mon, Apr 14, 2014 at 11:42 AM, Benn Kilburn <[email protected]
<mailto:[email protected]>> wrote:
August,
I'm being told that "we" (as opposed to "Enhpase") cannot delete
or remove rogue inverters from the Array Builder. Enphase has to
do this step. And if you just don't include the rogue inverters
in the Array Builder you are building for a particular system, you
will still receive the production data from the rogues. (2nd hand
info, so......?)
Louis,
Since some of these are home builder's 'show homes' and new home
builds, there is the possibility that internet has not always been
set up yet, so in some of these cases the inverters may not have
been dedicated to a particular Envoy yet.
If "we" cannot remove rogue inverters from a particular Envoy,
then we will likely just send the serial numbers of the Envoy and
respective inverters to Enphase and let them sort it out.
We may consider the Array Gun scanner option.
Anyone else have any feedback on this option?
Cheers,
Benn
On Mon, Apr 14, 2014 at 12:21 PM, Louis Woofenden
<[email protected] <mailto:[email protected]>> wrote:
Hi Benn,
We've run into these problems when simultaneously
commissioning systems in adjacent units of a housing
development where we did PV systems on all homes, and 2-3
homes are on one utility transformer. I'm a little surprised
that the Envoy picked up inverters from an existing system,
unless those microinverters were never associated with another
Envoy. My understanding from Enphase is that once they are
"bound" to one Envoy, they won't be easily picked up in a
device scan. But maybe I'm missing something, or got bad info
from tech support.
We've definitely had to work with Enphase tech support on a
couple of systems to remove inverters from one Envoy, then do
a device scan on another Envoy, as August suggested. Another
option is to spend the money for the Array Gun scanner
(SocketMobile CHS7xi scanner), and use the iOS Enphase
Installer Toolkit app to build arrays and "provision" the
Envoy, sending the inverter serial numbers directly to the
Envoy, without need for a device scan. Not sure if this is
worth it at the $450 retail price for the scanner, but if you
can find one used, it might be. I recently was able to pick
one up for about $250 used.
Haven't yet had issues serious enough to require LCFs on
residential systems. Crossing my fingers on that one.
Best,
Louis Woofenden
Net Zero Solar, Tucson, AZ
On 4/14/14, 9:08 AM, Benn Kilburn wrote:
Wrenches,
I'm sure i read a thread on this list about dealing with
this, i've searched but cannot find it. If anyone recalls
the subject line, please let me know.
We are dealing with setting up Enphase monitoring in
neighborhoods with other Enphase systems nearby and these
'other' systems are being picked up by the EMU.
A few weeks ago we finished a 14 module (3.5kW) install and i
plugged in the EMU to search for the inverters. As it was
picking up the first few inverters, it was showing several
hundred kWh already produced??? Not bad for a 14 module
system being in operation for 10 min!!! (yes the inverters
were new, out of the box)
After 30-40 min, the EMU had picked up 28 inverters in total.
There were 14 on the system we had just installed, and 14 on
a house across the street that we had installed back in
Nov'13. I'm pretty sure it had picked up the 14 across the
street before picking up the ones we just installed.
Funny that we can sometimes have communication issues btwn
the inverters and EMU in some houses, and here we have EMU's
picking up inverters across the street!?!
Anywho... has anyone dealt with this and streamlined a
process with Enphase to remedy this issue?
Cheers,
Benn
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