High Performance

Atlas ESS powers large loads over a long service life for off-grid and grid tied applications.
Atlas ESS provides the best performance and highest quality at the lowest cost.


Atlas ESS products are made with the highest quality components. All components have been safety tested and listed by a Nationally Recognized Test Lab (NRTL).


We use safe, high quality, large capacity, lithium iron phosphate cells that have passed tough UN38.3 safety tests.


Our Stationary Battery cabinets are fire rated by a Nationally Recognized Test Lab (NRTL). The cabinet protects the lithium cells from a fire outside the cabinet. The cabinet door has 3 large steel dead bolts, a key operated lock and an additional padlock hasp. The cabinet is constructed with multiple layers of 14 gauge steel and a tough powder coat finish.


Tough industrial controls run our energy storage system providing exceptional reliability. Auxiliary relay outputs are available to control other equipment in your power system. Our Battery Management System (BMS) is tested to UL 508, recognized and listed by a Nationally Recognized Test Lab (NRTL).

Serviced On Site

Atlas ESS products are designed to be serviced & repaired on site in a quick and safe manner.
Competitors products have to be sent away for repair. Atlas ESS keeps spare parts in stock.

Fail Safe

Should something in our product break, it will stop working in a safe manner.

Maintenance Free

Atlas ESS products are maintenance free.


Atlas ESS systems have a 15 year, 10,000 cycle warranty.

Competitor Comparison

Product Power
Number Of Circuits at 120Vac 60Hz Number Of Circuits at 230Vac 50Hz
Atlas ESS 10kWh 17,920



Tesla AC Powerall 2 5,000



LG Chem RESU 10 5,000



Sonnen 3,000



Simpliphi 3.4 kWh 1,536





Universal Battery Specification

Summary: Powerful, general purpose, maintenance free, rechargeable lithium iron phosphate battery for residential, commercial, vehicle and marine use. BMS with cell balancing. Modular design. Rack mount or stack batteries. Series and parallel arrangements allowed. Use with all inverters and charge controllers. Best warranty in the industry. Fully charged and ready to use 

Capacity: 5.25 kWh. 5,250 watt hours. For higher capacity use multiple batteries 

Warranty: 15 Year

Voltage: 12v, 24v, 48v. Up to 600vdc with multiple batteries connected together 

Power: 10,240 watts continuous with 2/0 AWG wire and 200A fuse (51.2v x 200a) 12,800 watts continuous with 4/0 AWG wire and 250A fuse (51.2v x 250a) 17,920 watts max with solid bus bar and 350A fuse (51.2v x 350a) 

Discharge Current: 200A and 100A continuous 


Charge Current: 100A and 60A continuous 

Wire Size: 2/0 AWG Fuse: 200A standard. Other fuses available 

Depth of Discharge (DOD): 100%. Typically set to 80% for maximum life Efficiency: 98%

Operating Temperature: 32 F to 113 F (0 C to 45 C)

Enclosure: Aluminium NEMA 1 in-doors. Floor mount. Rack mount and stackable 

Weight: 114 pounds (54 kg) and 135 pounds (61 kg) 

Dimensions: 27.25 in x 9.25 in x 12 in high 692 mm x 235 mm x 305 mm high and 24.75 in x 13.5” x 9.5 in high 629 mm x 343 mm x 241 mm high 

Battery Management System (BMS): Atlas ESS proprietary design, listed to UL 508 by a NRTL Warranty: 15 years, 10,000 cycles. Pro-rated. Transferrable. Best in industry



Stationary Battery Specification

Summary: Floor mounted, rechargeable lithium iron phosphate battery.

Modular components for easy shipping, handling and installation on site.

Compatible with popular inverters and charge controllers.

Capacity: 5 kWh to 30 kWh per cabinet. Larger capacity with multiple cabinets. Add capacity anytime.

Warranty: 15 years prorated, 10,000 cycles.

Efficiency: Battery: 98%. System efficiency depends on inverter and/or charge controller. Typically over 90%.

Chemistry: Lithium Iron Phosphate LiFePO4.

Depth of Discharge: Set during installation. Typically set to 80%

Power: Maximum continuous 17,920 watts. Determined by wire size. 10,240 watts with 2/0 wire.

Voltage: Available in 48v, 24v, 12v.

Current: 350 amp max. Typically 200 amp at 48v continuous with 2/0 awg wire. More with special order.

Over Current Protection: Typically 200 amp fuse. Other fuses available.


Operating Temperature: 0F to 113 F  (0 C to 45 C).

Enclosure: NEMA 1 in-doors. Fire rated for flammable materials.

Attachment: floor mounted.


10 kWh = 380 lbs 215 kg

20 kWh = 750 lbs 339 kg

30 kWh = 950 lbs 424 kg


15 kWh cabinet: 41″ x 24″ x 18″ = 1041mm x 597 mm x 457 mm

30 kWh cabinet: 65″ x 24″ x 18″ = 1651 mm x 597 mm x 457 mm

Approvals / Compliance:

All components used in Atlas ESS products are recognized and listed by Nationally Recognized Test Labs (NRTL).

Atlas ESS products comply with the US National Electric Code (NFPA 70 Edition 2017) and UN38.3.

40 kWh and Larger

Atlas Energy Storage Systems 40 kWh and larger are composed of multiple Atlas 20 kWh & 30 kWh batteries connected in series and parallel.

Energy Storage Systems up to 600 vdc and greater than 100 kWh are possible with the flexible Atlas ESS design.

Full data reporting and logging is available down to the individual cell level.

Contact one of our experts to discuss your needs.