A quick review of the Wikipedia page for the Tesla Powerwall 2 and the Lithionics data sheets indicate:
kwh 13,500 7,680
amp/hour 12v 1,125 640
cont. discharge 416 400
weight 264 lbs 165 lbs
size 44x29x5 23x13x11
price $5,500 $9,500
I used lithionics because it's the information that I had on hand, but I believe that their numbers are not extraordinary.
Note that the Tesla price includes the inverter.
Lithionics: GT Series 12 Volt (12V) 600 amp hour Group 8D Lithium Ion Battery for Cars and Trucks, Marine, Recreational Vehicles (RV), Solar Power Systems and Other Applications - Lightweight, Powerful and Safe Lithionics Lithium Ion Batteries.
SO my observation: If the Powerwall 2 is generally available (it's not clear to me that it is at this point), it appears to have a clear advantage.
My math could be wrong as could my understanding of the details.
My question: Amiright? Or am I missing something?