Certificate of Compliance — UL 9540 AC ESS
Certificate: 80257868 | Master Contract: 302773 | Date Issued: 2026-02-17
Issued to: Lunar Energy, Inc., 755 Ravendale Drive, Mountain View, California 94043
Standard
ANSI/CAN/UL 9540:2023, Third Edition — Standard for Safety of Energy Storage Systems and Equipment
Products
Li-ion Battery Energy Storage System (AC ESS), Models: L2-ESS-10KWH, L2-ESS-15KWH, L2-ESS-20KWH
The L2-ESS-20KWH AC-ESS is evaluated for use with up to two (2) DC Expansion Units, Model LE-DC-UNIT, allowing total system capacity up to 30 kWh.
AC ESS System Ratings
Energy Capacity: 10 kWh (L2-ESS-10KWH) / 15 kWh (L2-ESS-15KWH) / 20–30 kWh (L2-ESS-20KWH with expansion)
Max Continuous Power Output: 9.6 kW (full sun) / 5–7.5 kW (no sun)
Max Output Current: 40A continuous
Output Voltage: 210–264V AC (120/240V split phase, 60 Hz)
Max PV Input Power: 15 kW DC
DC Input Current (PV): 37.5A (PV), 30A (Battery)
SCCR: 10 kA
Max Overcurrent Protection: 50A
System Weight: 305 lb (10KWH) to 778 lb (30KWH)
Inverter Model: 10-005025
Source document: https://documents.lunarenergy.com/lunar-battery-ul-9540