[RE-wrenches] OutBack Power Radian Grid Zero GS4048A or GS8048A

[Peter Parrish]

Hi Tom et al,

I am sorry that I can't help you.

We have just installed a GS8048 (not an "A" model as I understand things)
system and are having some difficulty with Los Angeles Dept of Water and
Power getting an Interconnection Agreement. They have assigned an engineer
to review our application and he had responded by saying that 

"In addition to the information already submitted I will need the modes of
operations of the system you are installing by that I mean the schematic of
each different mode. I have attached a typical sample of Grid On & Grid Off.
However I will need the all modes pertaining to your system configuration.
Normally, there are 4-8. Please send your modes in PDF or CAD. Also please
indicate the lines that are "hot" in bold and arrows to illustrate the
flow."

It is clear that this engineer has little experience with DC coupled grid
tied systems with battery backup, as he sent me a couple of single line
diagrams for a Sunny Island system and is reluctant to provide us with an
example or two for a DC coupled system. 

I am surprised that LADWP has not developed any standard system
configurations / modes of operations that they can share with solar
contractors so that we can respond without having to spend a great deal of
time developing material that may in the end not be what they want.

To this end, I was interested in how much information you had gathered in
the process of designing/installing the system you refer to. 

I would appreciate any technical advice /documentation you could provide.

Warm Regards

Peter T. Parrish, Ph.D. 
President, SolarGnosis
1107 Fair Oaks Ave.
South Pasadena, CA 91107
Ph. (323) 839-6108, Fax. (323) 258-8827


-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Tom Lane
Sent: Thursday, April 17, 2014 12:02 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] OutBack Power Radian Grid Zero GS4048A or GS8048A

Fellow Wrenches , has anyone put in an OutBack Power Grid Zero GS4048A or
GS8048A in the Grid Zero mode . I am interested which appliances or loads
that you choose for the sub panel . I understand that you DO NOT have to get
an interconnection agreement SINCE you are sending ZERO back to the utility
. My estimate that a complete system cost about $1.33 to $1.55 dollars more
per watt . Does anyone know of a complete story INCLUDING loads chosen and
batteries used in an installed system . We need to get ready to use this
system in Florida as the utilities are paying off all the legislators to
stop net metering or only give you about a pittance for what you sell back .
Any real life installations on the OutBack Power Grid Zero I really want to
know the details . Thanks and Happy Trails . Gator Tom  PS : I understand
you can use the MidNite Classic Charge Controllers with this system and any
battery bank from 44 to 64 volts of any type of battery . I am using Full
River in my des  igns . Be happy to send a components list for both systems
to anyone who wants the components , got two homes in Florida we are
planning to use the GS4048A just a little anxious about choosing the loads
for the subpanel . 
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