[RE-wrenches] SMA Sunny Storage AC-coupled with SB6.0 won't recharge LG Resu batteries during backup ops

[Dave Angelini Offgrid Solar]

Hi Scott, 

Agree with all you have said and would add that my
experience with the failed 48vdc LG RESU 10 proved to me that LG needed to
go back and redesign the whole line of residential storage. Not ready for
prime time. It probably is just a good choice to stay away from their NMC
batteries. No matter what listings they have, it is much safer to use LFP
lithium. 

I have heard that the Tesla powerwall is useable (now) offgrid
with warranty. Sadly it is also NMC lithium. The Discover AES and today
Fortress are both closed loop (LFP) with Schneider AC coupling or DC. One
just sets the current date and configuration is done.  
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 Thu, 16 Jul 2020 07:16:39 -0500,
scot.arey at solarcentex.com wrote:   

@ Jerry Shafer: 

I think the title of
the post clearly lays out that the issue I was experiencing is with LG Resu
batteries. I am glad that you are having good outcomes with BYD but I never
said this was part of my problem. So when you say you are "doing it pretty
often" I'm assuming you are referring to the BYD battery. SMA acknowledges
verbally that this BYD battery offers uninterrupted operations whereas the
LG does not. 

Further, my original post never said a thing about stacking
of SBS.  

As for "how did (I) determine that LG was an approved solution
in the beginning:" SMA depicts this in its datasheets quite clearly. In
fact, LG Chem is listed before BYD.  

Bottom line - there is no recharging
capability with SMA AC-coupled PV inverter to LG Resu batteries.  

  


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