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WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
  • WALRUS G3 12K INV. 44 kWh Extension KIT
WALRUS G3 12K INV. 44 kWh Extension KIT
SKU: K0299
$7,948.00 USD $15,999.00 USD

🗐 - Walrus G3 Spec Sheet

🗐 -

Product Description:


The BatteryEVO 22kWh WALRUS G3 is a compact, high-performance storage system with a built-in 12.5k inverter, perfect for home or light commercial energy setups. Its reduced footprint allows for flexible placement in smaller spaces. Designed for modern users, the system supports efficient energy backup and management.

  • Color touchscreen for real-time system monitoring
  • Built-in wheels for easy mobility
  • AC110/220V dual voltage support
  • 10-year warranty batteries
Warranty Details

BatteryEVO provides a 10-year warranty with lifetime technical support, covering free repair or replacement of defective battery cells and ensuring reliable long-term performance.
Shipping & Returns

BatteryEVO’s Return and Exchange Policy requires customers to provide photos and proper packaging before returns, covers accessories with a 30-day replacement period, applies a 20% restocking fee for non-defective returns, and may involve additional fees for lithium battery shipments due to regulatory requirements.

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Product FAQ's
What is the MAX solar input on the Walrus G3?

The Walrus G3 supports two different ways of charging from solar: direct PV panels (off-grid) and grid-tied solar through your home’s main electric panel. The maximum input depends on which setup you are using.

Direct PV Solar (off-grid setup):

Input Voltage: 90–230V DC

Max Solar Power: up to 5,500W

Number of Panels: Depends on the wattage and voltage of each panel.

This setup is for connecting solar panels directly to the Walrus G3 to charge it when you are off-grid.

Grid-Tied Solar (home setup):

Connection: NEMA 14-50A port with breaker to your home’s main electric panel

Charging Path: The Walrus charges through the 50A AC input, not directly from panels.

Panel Count/Wattage: Not relevant, since your home system manages the solar before it reaches the Walrus.

For simplicity, BatteryEVO offers complete PV solar + Walrus kits, which include panels matched to the Walrus G3 for easy setup.
How long can a G3 battery power my home or devices?

The 22kWh battery inside the Walrus G3 can typically power essential home appliances for 1 to 2 full days, depending on usage.
For example:

A full-size fridge, lights, Wi-Fi, and laptop could run for 2+ days

A microwave or air conditioner can be supported for several hours

Power tools or water pumps (if used intermittently) are easily handled

Your actual runtime depends on your load: lighter loads last longer, while heavy appliances (e.g. HVAC or EV charging) consume energy more quickly.
With its 50A AC output, the G3 is capable of running most standard 120V and 240V home devices, including well pumps, washers, and even split-phase equipment.
Can I install this system myself, or do I need a professional?

The Walrus G3 is designed for easy installation and comes pre-configured with internal wiring.
If you're replacing an existing off-grid system, you may be able to install it yourself using:

The built-in NEMA 14-50R or SS2-50P AC output ports

Standard PV input ports (for solar connection)

A single wall-mounted unit with plug-and-play design

However, if this is your first time setting up an off-grid power system, we strongly recommend hiring a certified electrician — especially to ensure safe wiring, grounding, and proper breaker sizing.
The Walrus G3 supports both grid-tied and fully off-grid applications, so having a professional verify compatibility can help avoid costly mistakes.
System VoltageAC110V/220V
Nominal Voltage66 V
ChemistryNMC
kWh Capacity22 kWh
Ah Capacity330 Ah
Charging Voltage73V - 74.7V
Max Charge Voltage75.6 V
Operating Voltage Range54V - 74.7V
Suggested Low Voltage Cutoff54V - 60V
Cell Configuration18S2P
Max Continuous Discharge Current250 A
Max Continuous Power12.5 kVA
Max Discharge Peak Current300 A
Max Charge Current250 A
MPPT Charge Controller5500 W
Charge Temperature Range-20°C (-7°F) / 55°C (131°F)
Discharge Temperature Range-20°C (-4°F) / 55°C (131°F)
Optimal Discharge Temperature Range15°C (59°F) / 35°C (95°F)
Storage Temperature Range-5°C (23°F) / 35°C (95°F) (Max 6 Months)
Weight394 lb
Depth15.4 in
Width24.41 in
Height35.06 in