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Outback Power EnergyCell 5.1kWh 48 Volt, Stackable Heated Lithium Battery Module

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Manufacturer Warranty Included
SKU EC-FE5148
Original price $2,300.00 - Original price $2,300.00
Original price
$2,300.00
$2,300.00 - $2,300.00
Current price $2,300.00
Availability:
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Refunds & Returns Policy

At OffGrid Living, we are proud to have the best refund and return policies in the industry. If you’re not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.

If you have a problem with our order (there are missing components, damages, or the product is not functioning), please reach out to us as quickly as possible. Some of the problems can be resolved by going through the product manual or the product FAQs.

Refer to our Refunds & Return Policy for more details.

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Outback Power EnergyCell 5.1kWh 48 Volt, Stackable Heated Lithium Battery Module

Description

The Outback Power EnergyCell 5.1 is a 48V, 5kW-rated lithium iron phosphate (LFP) battery module designed for scalable residential and commercial energy storage systems. With integrated heating, IP65 outdoor rating, and stackable architecture supporting up to 24 modules, this battery delivers long-term reliability and high-performance energy storage.

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Outback Power EnergyCell 5.1kWh 48V Lithium Battery Features

5.12kWh Nominal Capacity – high-density LFP battery chemistry for stable performance

5kW Continuous Output – dependable charge and discharge capability

7.68kW Peak Power – 2-second surge handling for demanding loads

Integrated Heating – optimized performance in cold environments

IP65 Outdoor Rating – weather-resistant enclosure for indoor or outdoor use

Stackable Design – 3–8 modules per stack, up to 24 modules total

RS485 & CAN Communication – inverter and system integration ready

125A Internal Breaker – built-in battery protection

8000 Cycle Life – rated at 0.5C, 80% DoD, 25°C

10-Year Warranty  long-term manufacturer-backed support

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Outback Power EnergyCell 5.1kWh 48V Lithium Battery Applications

  • Residential Energy Storage – whole-home backup and solar self-consumption
  • Commercial ESS Systems – scalable storage for higher load demands
  • Hybrid Solar Installations – compatible with CAN/RS485 inverter systems
  • Cold Climate Installations – integrated heating for low-temperature charging
  • Outdoor Energy Storage – IP65-rated enclosure for exposed environments

What's Included

Everything you need is included with your product.

  • 1 × EnergyCell 5 Battery Module
  • 2 × Red & Black Power Cables (2 AWG, 6 ft / 180 mm each – 2 Red, 2 Black)
  • 4 × Screws
  • 4 × Expansion Anchors
  • 2 × Wall Brackets
  • 1 × Emergency Shutdown DI/DO Connector & Cable (59 in / 1500 mm)
  • 1 × 120 Ω RJ45 Terminating Resistor
  • 1 × Battery-to-Battery RJ45 Ethernet Communication Cable (8.5 ft / 2200 mm)
  • 1 × Chassis Connector (Battery-to-Battery)

Product Specifications

Outback Power EnergyCell 5.1kWh 48 Volt, Stackable Heated Lithium Battery Module Product Specifications

Specification Value
Model Name EC-FE5148
Product Type Low-voltage LFP battery pack
Battery Type Lithium Iron Phosphate (LFP)
Nominal Energy Capacity 100Ah
Nominal Voltage 51.2Vdc
Voltage Range 44.8–57Vdc
Usable Energy (DoD %) 100% (80% recommended)
Continuous Charge/Discharge Power 5kW (2.5kW recommended)
Peak Power (Duration) 7.68kW (2 seconds)
Communication Protocols RS485, CAN

Electrical Characteristics

Specification Value
Charge Voltage Range 56.0+/-0.8Vdc
Discharge Cut-off Voltage 44.8Vdc
Max Continuous Charge Current 100Adc (50Adc recommended)
Max Continuous Discharge Current 100Adc (50Adc recommended)
Max Parallel Units 24 EnergyCell 5 battery modules, 3 EnergyCell 5 control modules

Protection Features

Specification Value
Recommended Charging/discharging rate 0.5C
Short circuit protection >250Adc for 0.1ms
Battery Breaker 125Adc
Interrupt current rating 10kA

Other Specifications

Specification Value
Certifications and compliance UL 1973, UL 9540 DC ESS (pending), UL9540A, UN 38.3
Warranty and lifecycle ≥8000 (0.5C@25°C, 80%DOD) 10 years
Cycle Life (80% capacity) 8000
Design Life >10 years

Product Manual

OutBack EnergyCell 5 – User Manual

OutBack EnergyCell 5 Integration

Product Warranty

Outback Power Warranty

How to Arrange for Warrant Services

During the warranty period beginning on the invoice date, OutBack Power will repair or replace products covered under this limited warranty that are returned to OutBack Power’ facility or to an OutBack Power authorized repair facility, or that are repaired on site by an OutBack Power authorized repair person.

Warranty Documentation

Click the following links for warranty documentation pertaining to your product

Limited Warranty

EnergyCell 5

FXR/VFXR A/E Series, Radian A/E Series, FLEXmax 60/80, FLEXmax 100, MATE3s, and any FLEXpower systems incorporating these models:

OBX Extreme Series and other specialty or customized inverter/chargers:

FX/VFX, Radian GS8048, FLEXmax Extreme, and any FLEXpower systems incorporating these models:

MATE, MATE3, FLEXnet DC, AXS Port, all HUB products, Radian GS Load Centers, FLEXware products, autotransformers, combiners and all general “balance-of-system” (BOS) products:

Mojave:

Contacting OutBack

To request warranty service, contact OutBack Technical Support at +1.360.435.6030 or direct at +1.360.618.4363 or visit our Online Support Request page. To ensure warranty coverage, this contact must be within the effective warranty period. If service is required, the OutBack Technical Support representative will issue a Return Material Authorization (RMA) number.

Troubleshooting

In the event of a product failure, the customer will need to work with an OutBack Technical Support representative to perform the necessary troubleshooting. This is a required step before a return can be performed. Troubleshooting requires a qualified technician to be present at the site of the product, with a quality voltmeter that measures both DC and AC. The OutBack representative will request voltmeter readings, product error messages, and other information. Many problems can be resolved onsite. If the customer is not willing or able to provide these readings (or is not willing or able to visit the site), and the product is found to have no problems upon return, OutBack may choose to charge additional labor and handling fees up to $180.00 USD.

Return Material Authorization (RMA)

A request for an RMA number requires all of the following information:

  • Product model and serial number
  • Proof-of-purchase in the form of a copy of the original Product purchase invoice or receipt confirming the Product model number and serial number
  • Description of the problem
  • Shipping address for the repaired or replacement equipment

Upon receiving this information, the OutBack representative can issue an RMA number.

Returning Product to OutBack

After receiving the RMA number, the customer must pack the product(s) authorized for return, along with a copy of the original purchase invoice and warranty certificate, in the original product shipping container(s) or packaging providing equivalent or reasonable protection. The RMA number must be written on the outside of the packaging where it is clearly visible.

If product is within the warranty period, OutBack will cover pre-paid shipping with prior arrangement.

The product(s) must be shipped back to OutBack Power in their original or equivalent packaging, to the following address:

OutBack Power
RMA # ____________________
400 Maple St
Commerce, TX 75428
United States

The customer must insure the shipment, or accept the risk of loss or damage during shipment. If a shipping box is needed for return of a product, OutBack will, upon request, send a shipping box.

IMPORTANT:

OutBack is not responsible for shipping damage caused by improperly packaged products, the repairs this damage might require, or the costs of these repairs.

If, upon receipt of the product, OutBack determines the product or product part is defective and that the defect is covered under the terms of this warranty, OutBack will then and only then ship a repaired or replacement product or product part to the purchaser freight prepaid, non-expedited, using a carrier of OutBack’s choice, when applicable.

If product fails in 90 days or fewer from the original purchase date, OutBack will replace with a new product. If product fails after 90 days and up to expiration of warranty, OutBack will, at its discretion, either repair and return a product, or ship a replacement product. OutBack will determine whether a product is to be repaired or replaced in accordance with product age and model. OutBack will authorize advance shipment of a replacement based on product age and model.

In cases where an OutBack dealer or distributor replaces a product more than 90 days old with a new product, OutBack will NOT compensate that dealer or distributor with new stock unless the exchange was authorized in advance by OutBack.

Out of Warranty

If product is out of warranty, OutBack will repair and return product for a fee. Alternately, if applicable, OutBack will advance-ship replacement parts for a fee upon request.

If a shipping box is needed for return of out-of-warranty product, OutBack will send a shipping box upon request. The customer is responsible for paying shipping to OutBack.

The warranty period of any repaired or replacement product or product part is 90 days from the date of shipment from OutBack, or the remainder of the initial warranty term, whichever is greater.

This warranty is void for any product that has been modified by the customer without authorization by OutBack. A product with a voided warranty will be treated the same as one with an expired warranty.

Product FAQs

Outback Power FAQs

How many modules can be stacked?

Up to 24 battery modules can be connected (3–8 per stack configuration).

Is this battery suitable for outdoor installation?

Yes. It is rated IP65 for outdoor use.

Does it include heating?

Yes. The module includes integrated heating for cold-temperature charging.

What is the cycle life?

Rated for 8000 cycles at 0.5C and 80% DoD.