[RE-wrenches] Lithium Batteries

[Dave Angelini Offgrid Solar]

Hi Howie, 

The largest I have seen/worked on is the AES with (17) 6.6
KWH batteries. I can tell you it works fine with an XW system. 

Even
though it looks like AES uses the conext battery monitor, it really does
not and you do not have to buy one. Because AES was from xantrex employees,
Schneider lets them use the xanbus data to simulate a battery monitor. See
attachment for what it looks like on the conext gateway. The Iron Edison is
nice also but you would need the shunt and battery monitor. 
Dave Angelini
Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail offgridsolar at sti.net
[2]
text 209 813 0060

On Fri, 3 May 2019 15:45:28 -0400, Howie Michaelson 
wrote:   Hi Folks, About to spec my first Lithium battery backup job. The
client is not a heavy user, but wants things done right more than being
totally cost effective.  We put in 14kW of net metered solar using
SolarEdge and now he wants the backup component. This was significantly
oversized for his use, but he wanted to be sure he was putting a bunch more
back into the grid than he was using (making up for past profligate power
usage). We will be using a dual stacked XW 6848, mostly for enough backfeed
capacity (we could wire in a transfer switch and only use 1 XW, but he'd
prefer this setup instead). I have narrowed down my choice for batteries to
either:  

 	* (2) Iron Edison 200 amp hour batteries, or
 	* (3) Discover
AES 130 amp hour batteries

 Advantages for the AES are that they integrate
directly with the Schneider Xanbus network so the Conext battery monitor
provides direct insight into the SOC and SOH of the batteries, and they
have a slightly higher rated cycle life so higher lifetime energy capacity.
 Advantages of the IronEdison are they come in a larger amp hour size
allowing for only needing 2 vs. 3 batteries, they have an integrated fuse
and disconnect, and from my sources are 1/3 less in price.   If anyone has
any thoughts on any of this, or corrections to my comparison, I'd greatly
appreciate it.    -- 

 

Links:
------
[1]
http://members.sti.net/offgridsolar/
[2] mailto:offgridsolar at sti.net
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