We just struggled through our first two OB RS Radian systems. We did not
opt for the "package" including batteries as we and our customers
thought it was overpriced. We build our own battery boxes and use cost
competitive batteries based on the customer's need.
OB needs to improve the installer experience for deciphering their
manuals for at least the 4048. It seems like the forgotten
stepchildcompared to the 8048.
That being said, we did get the systems running. The Radian seems solid.
Probably most of you know I am very much opposed to NEC Rapid
Shutdownfor reasons I have stated on this list. Modifying it, if not
eliminating it, would not make systems less safe, and would greatly
reduce these machinations of how to best meet this type of customer's
needs.
Chris
On 9/13/2018 2:14 AM, Marco Mangelsdorf wrote:
The SMA Sunny Storage looks promising.
It will be able to work with the LGC RESU10 HV battery and, sooner
rather than later I hope, BYD package as well.
And it will allow for a backup generator tie in.
Ta-dah!
marco
On Thursday, September 13, 2018, Bruce Erickson
<br...@mendocinosolar.com <mailto:br...@mendocinosolar.com>> wrote:
Hi Marco,
I partially agree with you. I recently bid Outback, StorEdge, and
Pika options for a GTBB customer, partly to understand pricing for
myself, and found OB to be so much more expensive. The customer
really wanted a system that would be to be able to charge the
batteries off a generator in an outage, understandably. But the
extra thousands in cost for OB ended up being prohibitive. Add-on
rapid shutdown is a killer. So he’s opting for a nice modern high
voltage DC system, with optimizers and built-in RSD, but when
there’s an extended outage, he’ll have to hope the sun comes out
right after the storm to recharge the batteries, or he’ll end up
in the dark again, until the grid comes back. Maybe there’s a high
voltage inverter that allows generator charging, or a third-party
battery charger, that I’m not aware of. Otherwise high voltage
systems are very limited for backup, at least in winter storm
scenarios.
*Bruce Erickson*
Mendocino Solar Service
PO Box 1252
Mendocino, CA 95460
707-937-1701
707-937-1741 fax
br...@mendocinosolar.com <mailto:br...@mendocinosolar.com>
/Connecting Mendocino County to Solar Since//1994/
On Sep 12, 2018, at 6:26 PM, Marco Mangelsdorf
<ma...@pvthawaii.com <mailto:ma...@pvthawaii.com>> wrote:
Aloha all,
At the risk of whacking at a hornet’s nest…lower voltage DC is
soooo 80s and 90s especially when it comes to grid-tie
applications with battery storage.
The time of OutBack and Schneider and all the others doing 48VDC
is drawing to close. Enough already. Thank you for your service.
The sooner the industry fully migrates to higher voltage DC
(Tesla, LG Chem, BYD and others), the better.
marco
*From:*RE-wrenches
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>]*On Behalf
Of*Peter Giroux
*Sent:*Wednesday, September 12, 2018 3:03 PM
*To:*RE-wrenches
*Subject:*Re: [RE-wrenches] Any thoughts on this approach to
adding battery backup to an existing grid tie system will be
appreciated.
Ken
We have had terrific success with AC Coupling. Yes there are some
differences from Dc Coupled systems but if built properly,
customer is willing to learn how to use it and maintain it and
you put the correct relays in to shut off the string inverters if
battery voltage gets to high, great.
If you have a customer that refuses to exercise the system, not
check the batteries if they are fla's and overloads it when the
power goes down then not so cool. We have customers that power
shave with it, have had backup power for days until the power
came back on as they monitored the loads and were judicious about
use. Ray is right in the sense the customer needs to learn how to
use the system or they can royally screw it up ( yes we have had
two do this, one learned the other not ).
The Radians have been great work horses for this application,
sadly as Ray mentioned Outback has moved away from it as a
primary solution.
peter giroux
ASAE
Atlanta
----- Original Message -----
*From:*Ken Schaal <mailto:k...@commonwealthsolar.com>
*To:*RE-wrenches <mailto:re-wrenches@lists.re-wrenches.org>;Ken
Schaal <mailto:cwsol...@gmail.com>
*Sent:*Wednesday, September 12, 2018 8:11 PM
*Subject:*[RE-wrenches] Any thoughts on this approach to adding
battery backup to an existing grid tie system will be appreciated.
https://www.youtube.com/watch?v=eyhkIfS5Z-Q
<https://www.youtube.com/watch?v=eyhkIfS5Z-Q>
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