The Lion Vault

Powered by Sanctuary 3 ESS

The Lion Vault

Reliable Energy Storage, Anywhere

The Lion Vault is a robust, standalone energy storage solution that meets strict safety rules for harsh outdoor conditions. It pairs the proven Sanctuary 3 hybrid inverters and Lithium Iron Phosphate batteries in a single, pre-assembled enclosure — engineered for fast installation and years of dependable service.

When the grid goes down, the Vault detects the outage and automatically keeps your critical loads running: refrigeration, lighting, HVAC, Wi-Fi, tools, and point-of-sale. Fully solar- and generator-ready, it works on-grid or off-grid, so it's the perfect add-on for expanded energy storage in the home or workplace.

Technical Specs

KEEP THE LIGHTS ON AT HOME

Whole-home resilience for outages, storms, and time-of-use savings quiet, fume-free, and maintenance-free.

Automatic backup for refrigeration, lighting, furnace & Wi-Fi
Store solar by day, power your home after dark
Prioritize essential loads from your phone
Ride out multi-day outages with expandable capacity
May qualify for the 30% federal residential tax credit*

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KEEP YOUR BUSINESS RUNNING

Commercial-grade backup that protects revenue, inventory, and customers when the grid fails.

Up to 72 kW output for POS, refrigeration & equipment
Peak-shaving & demand management to cut energy bills
On- and off-grid operation, solar & generator ready
Scales to 171.6 kWh for extended commercial runtime
Secure, USA-based monitoring for multiple sites

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Two popular configurations

From Home to Headquarters

Two ready-to-order sizes — or design your own in the configurator below.

2 × 4 · Home

The 2×4 Vault

2 Inverters · 4 Batteries · Model 2i-4b

24 kW

AC Output

36 kW

Solar Input

57.2 kWh

Capacity

100 A

Output Current

4 × 12 · Commercial

The 4×12 Vault

4 Inverters · 12 Batteries · Model 4i-12b

72 kW

AC Output

108 kW

Solar Input

171.6 kWh

Capacity

300 A

Output Current

Interactive Configurator

Build Your Vault

Dial in inverters and batteries to match your power and runtime needs. Specs update live.

Configure

Start from a preset, then fine-tune.

Sanctuary 3 Inverters2

12 kW output & 18 kW solar input each · range 2–4

Sanctuary 3 Batteries4

14.3 kWh each (Lithium Iron Phosphate) · range 4–12

Configurations mirror the Lion Vault modular platform: each base Vault houses 2 inverters and up to 6 batteries, with battery and inverter expansion vaults added as capacity grows.

Your Configuration

Model 2i-4b · 1 base Vault

24 kW

AC Output Power

36 kW

Max Solar Input

57.2 kWh

Nominal Capacity

100 A

Rated Output Current

26 hrs

Estimated backup runtime at a 2 kW essential load · approx. 2,243 lbs installed weight

Request a Quote for This Build →

Mobile App Integration

Your energy, in your pocket

Monitor performance and manage your system from anywhere with real-time power-flow visuals and easy controls.

Live MonitoringReal-time power flow, comparative graphs, and clear usage charts online.
Full ControlAdjust battery settings and prioritize essential loads from your device.
Real SavingsSave thousands while unlocking affordable, clean energy.

Lion Vault · Live

82%CHARGED

4.2kWSOLAR

1.8kWHOME

2.4kWSTORED

Technical Specifications

Under the Hood

Lion Vault comes pre-assembled with UL9540-certified inverters and batteries.

Vault Specification	Detail
Enclosure	NEMA 3R / Type 3R
Dimensions (L×W×H)	58.25" × 51" × 67.25"
Color	White
HVAC	CARB-approved refrigerant, internally powered
Transfer Switch (optional)	200A, two-position — Vault or Bypass
Lifting Interface	Spreader bar for craning; forklift & craning points
Security	Lockable by key
Wiring & Breakers	Integrated internal wiring and breakers
Max Efficiency	96.5%

Sanctuary 3 Inverter (18kW, Grid-Support Interactive)	Per Inverter
Rated Output Power	12 kVA
Rated Output Current	50 A
Max PV Input	18 kW
MPPT Input Voltage	120–430 V
AC Solar Max	12 kW
Grid Voltage	120V / 240V Split-Phase
Grid Frequency	60 Hz
Grid Passthrough	200 A
Overcurrent Protection	100A circuit breaker, each inverter
EPS Rated Output	12 kVA

Sanctuary 3 Battery (14.3 kWh)	Detail
Battery Type	Lithium Iron Phosphate (LiFePO4)
Capacity (each)	14.3 kWh
Voltage Range	40 – 55.6 VDC
Charging Temp / Current	-4°F to 131°F / 150 A
Discharging Temp / Current	-4°F to 131°F / 160 A
Weight (each)	290 lbs
Dimensions (H×W×D)	44.4" × 18.50" × 9.75"
Compliance	UL1973, UL9540, UL9540A

Config	Model	AC Output	Solar Input	Capacity
Base Vault (2×4)	2i-4b	24 kW	36 kW	57.2 kWh
Base + 2-Battery	2i-6b	24 kW	36 kW	85.8 kWh
Base + Inverter & 2-Battery	3i-6b	48 kW*	54 kW	85.5 kWh
Base × 2	4i-8b	48 kW	72 kW	114.4 kWh
Base × 2 + 4-Battery	4i-12b	48 kW	72 kW	171.6 kWh
Commercial (6×12)	6i-12b	72 kW	108 kW	171.6 kWh

FIND OUT MORE ABOUT THE VAULT

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Power Outages Happen. Be Ready.

The average U.S. power outage lasts about 8 hours and that number is rising. The Lion Sanctuary™ keeps your essentials—fridge, lights, furnace, outlets, and Wi-Fi—running for most outages.

Powered by our advanced LionESS™ technology, it delivers reliable, maintenance-free backup you can trust.

For homes in hurricane or flood zones, where outages average around 25 hours, the Sanctuary offers expandable capacity to keep you powered even longer.

Inquire Now

Case Studies

Heath and Cedar at Red Poppy Ranch were looking for a way to replace an array of 12V batteries for their off-the-grid energy storage. The Lion Sanctuary system more than met their needs.

Watch More Case Studies

Become a Certified Installer

If you are an installer or want to become one, visit us here.

Installer Information

You May Qualify for Tax Credits

Thanks to the Inflation Reduction Act, residential batteries installed in 2023 may qualify* for a 30% federal tax credit even without being connected to solar. This incentive can save you thousands and makes clean, reliable energy more affordable than ever.

*To qualify, you must own the battery system, have taxable income, and install it at your primary residence. The system must be a first-time installation with a capacity of at least 3 kWh. Additional requirements may apply, so consult a local tax professional. Source: energy.gov

Learn More About Tax Credits

Testimonials

The Lion Sanctuary is a perfect solution to integrate a smart energy storage system with our current centralized electrical grid.
— Tyler HortinCEO of Lion Energy

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