Depth of Discharge would be the manufacturer’s suggestion for simply how much power you could pull through the battery at one time relative to its full capacity. Battery look Visible check: Meticulously open the protecting carton/wood box After batteries received. Check out If your batteries with any scratches or impacted. https://48v200ah1024kwhrack-mount28037.livebloggs.com/37259269/getting-my-battery-15kwh-all-in-one-home-energy-storage-on-grid-high-voltage-battery-with-inverter-and-battery-to-work