Q Cells, Q.HOME HYB-G1, 
7.6kw 120/240Vac Hybrid Inverter DC or AC Coupled, 
Including 3 x 6.3kWh (18.9kWh total) NMC (Nickel-Manganese-Cobalt) Battery Storage
You can connect 3 x 6.3kWh batteries to the inverter with a total capacity of 18.9kWh.

With this kit you will get also free:
Auto Transformer (ATS)
BMS (Battery Management System)
Connection box for the Primary Battery
Connection Box for the Secondary Batteries

When buying this Energy Storage System, we will offer you a pallet (30 modules) of Canadian Solar 395W Black Modules for only $4,284. If you are interested, add a note when you purchase your Energy Storage kit and we will send you the details. https://www.ebay.com/itm/235240102021

The Q.HOME+ ESS HYB-G1/AC-G1 energy storage solution offers scalable storage capacity up to 18.95 kWh and comes in a modular design for easy and fast installation. The system is offered in both DC-coupled and AC-coupled configurations and can connect up to three batteries in series using only one inverter and battery management system (BMS). The system includes an integrated backup power function for 100% of the rated inverter output to support critical loads in the event of power failure and offers remote monitoring using the Q.HOME+ web portal or Q.HOME+ ESS mobile app.

Installation video: https://youtu.be/oh4QEw8r24g