4,554 kWh · 1,000 kW · Lithium Ion
ETS1500/ ECE1500/ ECE1500: 4,554 kWh nameplate energy; 1,000 kW continuous; lithium ion.
4,554 kWh nameplate, per the California Energy Commission list.
Yes — the CEC list shows UL 9540 certification (certified by ul).