Lion Energy Sanctuary 3 Energy Storage System (AC ESS)

The Sanctuary 3 Energy Storage System is a powerful, quiet, and fully automated whole-home backup solution designed for modern, high-demand households. With an 18kW grid-interactive inverter and advanced LiFePO₄ battery technology, it delivers seamless power during outages without fuel, noise, or manual switching. Built to scale, Sanctuary 3 grows with your energy needs, offering long runtime, high output, and intelligent energy management.

Features

• Whole-home backup power with instant automatic switchover
• Silent operation with no fuel or emissions
• High-output 18kW split-phase inverter
• Scalable inverter and battery expansion
• Supports HVAC, large appliances, and critical loads
• Advanced LiFePO₄ battery technology
• Grid-interactive with generator and AC-coupled solar support
• Designed for indoor or outdoor shaded installation
• Low maintenance, long service life

Specifications

System

• Max Parallelable Inverters: 4
• Max Parallelable Batteries: 15
• Max Parallelable Output Power: 48kW
• Max System Capacity: 215.6kWh
• Max System Weight: 4,225 lbs
• Max Parallelable Circuit Protective Device: 240A
• Usable Capacity: 80%
• Single Cycle Round Trip Efficiency (SCRTE): 89%
• Battery State of Health at End of Warranty: 70%
• Humidity Rating: 0–95%
• Altitude Rating: 0–4,000m, derating above 2,000m
• Ingress Protection: NEMA 3R, IP65
• Max Internal Fault Current Rating: 1,800A
  

Inverter – Sanctuary 3 (18kW Grid-Interactive)

• Rated Power (On-Grid): 18kW
• Max Apparent Power: 19.8kVA
• Nominal AC Output Current: 75A
• Max AC Output Current: 82.5A
• Output Voltage: 120 / 240V split-phase
• Grid Frequency: 60Hz
• Max Grid Pass-Through: 200A
• Off-Grid Output Power: 12kW
• Power Factor Range: 0.8–1
• Output THD: <2%
• Maximum Output Fault Current: 71.3A (1 cycle), 724A (5 cycles)
• PV Input Power: 18kW
• MPPT Voltage Range: 120–430V
• Max PV Input Voltage: 600V
• Max Short Circuit Current per MPPT: 22A
• Battery Voltage Range: 40–58.4V
• Max Charging Current: 250A
• Max Discharging Current: 260A
• Max Efficiency: 96.5%
• Rapid Shutdown: Tigo RSS Transmitter
• Arc Fault Protection: AFCI, PV DC Arc
• Dimensions: 51.5" × 19.5" × 10.43"
• Weight: 184 lbs

Battery – Sanctuary 3 (14.3kWh)

• Battery Type: Lithium Iron Phosphate (LiFePO₄)
• Rated Voltage: 51.2VDC
• Voltage Range: 40–58.4VDC
• Capacity: 14.3kWh
• Operating Temperature (Charge): 32°F to 113°F
• Operating Temperature (Discharge): -4°F to 140°F
• Derating: Below 50°F, Above 104°F
• Dimensions: 44.91" × 18.50" × 10.43"
• Weight: 290 lbs
• Lion Energy Sanctuary 3 ESS Spec Sheet
• Lion Energy Sanctuary 3 ESS Installation Guide

Certifications & Compliance

• ESS System: UL 9540
• Inverter: UL 1741, UL 1741 SB, IEEE 1547-2018, IEEE 1547.1-2020, FCC Part 15 Class B, UL 1699B
• Battery: UL 1973, UL 9540A

Other Details

• Supports generator or AC-coupled solar connection, single source only
• Auto-start generator functionality supported
• Install in shaded, well-ventilated locations only
• High-voltage system, electric shock risk
• Capacitors retain hazardous energy, do not touch
• Read all instructions before installation, operation, or maintenance