How much usable power does one unit give?

It is rated at 16kWh with 314Ah at 48V. Usable energy is slightly less after depth-of-discharge limits set by the BMS.

Can I run my whole house on one battery?

It can carry 200A continuous, about 12.8kW peak, which covers most homes' essential loads. Whole-home coverage for long outages usually needs several units in parallel.

Does it work in a cold garage?

Yes. The self-heating function warms the cells so charging stays safe in low temperatures. It is rated for indoor installation only.

How many can I connect together?

Up to 16 units can run in parallel, giving a very large bank. Each unit needs proper breaker and cable sizing.

Does it need an EG4 inverter?

No, but Auto-ID and full BMS monitoring work best with EG4 inverters. Other 48V inverters can use it with standard communication settings.

What is included with the battery?

The battery, wall-mount bracket and mounting hardware. Cables, breakers and an inverter are sold separately.

Where is the EG4 WallMount Indoor Systems cheapest?

At RES Supply, for $3,583.00, as of our latest check.

Where can I buy the EG4 WallMount Indoor Systems?

11 stores we checked sell it, including RES Supply, US Solar Supplier, ShopSolar.com, Inverters R US, Outbound Power.

EG4 WallMount Indoor Systems Price History: Lowest $3,583.00

What reviewers say

Owners of EG4 wall-mount batteries generally report solid build quality and steady capacity, and value the self-heating and simple Auto-ID setup. Complaints center on weight, indoor-only placement and the need for EG4-compatible gear to get the most from the BMS.

What people mention

CapacityPraisedOwners say the 16kWh rating holds up in daily use and covers a full night of household loads.
Self-heatingPraisedUsers in cold garages report the heater keeps the battery charging through winter.
SetupPraisedAuto-ID pairing with EG4 inverters is described as quick, with no DIP switches to set.
WeightCriticisedReviewers note the unit is very heavy and needs two people and solid mounting.
PlacementCriticisedThe indoor-only rating is a common complaint for owners who wanted it in a shed or outside.
CompatibilityMixedFull BMS features work best with EG4 inverters; other brands get basic communication.

From ShopSolar.com

16kWh capacity (314Ah @ 48V) for backup and off-grid energy storage
200A continuous discharge / 12.8kW peak output supports heavy household loads and surges
Self-heating function maintains performance in cold temperatures
Dual fire arrestors plus smart BMS with real-time cell monitoring and active balancing
Auto-ID plug-and-play setup, no DIP switch needed
Scalable up to 16 units in parallel

Fit: Compact wall/floor-mountable indoor enclosure; dimensions 34.1 in. × 18.1 in. × 9.6 in.; weight 293.2 lbs. (133 kg); IP20 enclosure; floor mount or wall attache
Care: Storage temperature range -4 – 131°F (-20 – 55°C); humidity range 5% – 95% RH (non-condensing); operating charge 32 – 122°F (0 – 50°C), discharge -4 – 131°F (-2
Guarantee: 10 years or 10,000 cycles manufacturer warranty
Returns: 30-day returns
Shipping: Orders processed in 24–48 hours; ships from the USA with warehouses in CA, TX and NY

About the EG4 WallMount Indoor Systems

The EG4 WallMount is a 48V, 314Ah indoor battery with 16kWh of capacity. It is used for backup and off-grid energy storage. It delivers 200A continuous discharge and 12.8kW peak output for heavy household loads and surges.

A smart BMS monitors the cells in real time and balances them actively. Dual fire arrestors add protection. A self-heating function helps the battery keep performing in cold temperatures.

Auto-ID makes setup plug-and-play, with no DIP switch needed. Up to 16 units can be connected in parallel to scale up capacity. The compact indoor enclosure can be mounted on a wall or on the floor.