Charging LiFePO4 below freezing damages the cell — EGbatt’s self-heating packs solve it with an internal film that warms the cells before they take a charge.

Overview

Standard LiFePO4 must not be charged below 0°C; doing so plates lithium metal and permanently hurts the cell. EGbatt self-heating batteries embed a heating film that draws a small current to warm the cells above the charge threshold before the BMS allows charging. The result is a pack that safely charges in a cold shed, RV or off-grid cabin through winter — at the cost of a little energy to run the heater. We build self-heating variants at 12V/24V/48V for exactly these climates.

Key specifications

SpecificationValueWhy it matters FeatureInternal self-heating filmEnables sub-0°C charging. TriggerHeats above charge threshold before chargeProtects the cell. Voltage12.8 / 25.6 / 51.2VPer application. ChemistryLiFePO4Safe when warm. Trade-offSmall energy to run heaterWorth it in cold climates.

Typical applications

  • Cold-climate RVs: Winter charging.
  • Off-grid cabins: Below-freezing charge.
  • Solar in winter: Low-temperature banks.
  • Outdoor telecom: Unattended sites.

How to specify & buying guide

  • Choose self-heating only if the pack will actually be charged below 0°C; otherwise a standard LFP is cheaper.
  • Confirm the heater draws from the pack (slight loss) and that the BMS gates charge on temperature.
  • Size capacity with the heater overhead in mind for cold periods.
  • Keep the pack within the inverter's LFP voltage window.

Engineering & manufacturing at EGbatt

Our modules pair matched LiFePO4 cells with a purpose-built BMS, busbars and mechanical enclosure. We design for the thermal and vibration profile of the application — stationary rack, wall mount or mobile pack — and validate the assembly on capacity, IR balance and thermal runaway margin before it ships.

Certifications & compliance

  • UN38.3 — Mandatory lithium battery transport test (altitude, thermal, vibration, shock, external short). Required for any cross-border shipment.
  • IEC62619 — International safety standard for industrial Li-ion cells and batteries; expected by EU and most APAC buyers.
  • CE — EU declaration of conformity for the applicable directives.
  • RoHS — Restriction of hazardous substances in the battery and BMS.
  • IP65 — Dust-tight and low-pressure water-jet resistant — suitable for outdoor enclosures.

Frequently asked questions

Can it charge below freezing?

Yes — the internal heater warms the cells above the threshold before the BMS allows charge.

Does heating use my stored energy?

A small amount, drawn from the pack to run the film.

Is discharge also limited in cold?

Discharge is fine to lower temperatures; it is charging that needs the heater.

When do I need this vs low-temp cells?

If you charge below 0°C, self-heating; if only discharge is cold, low-temperature cells may suffice.

Related products & resources

  • Low-Temperature Batteries
  • 12V LiFePO4
  • RV Batteries

More in this series

  • Lithium Battery Products
  • LiFePO4 Cells
  • Cylindrical Lithium Cells
  • LiFePO4 Battery Modules
  • LiFePO4 Battery Management Systems (BMS)
  • Sodium-Ion Batteries
  • 12V LiFePO4 Batteries
  • 24V LiFePO4 Batteries
  • 48V LiFePO4 Batteries
  • Residential Energy Storage Systems
  • Commercial & Industrial Energy Storage
  • Containerised BESS
  • Portable Power Stations
  • RV Lithium Batteries
  • Marine LiFePO4 Batteries
  • Golf Cart Lithium Batteries
  • Deep Cycle LiFePO4 Batteries
  • Trolling Motor Lithium Batteries
  • Forklift Lithium Batteries
  • Low Temperature Lithium Batteries
  • Hybrid Inverters
  • Inverter Chargers
  • MPPT Solar Charge Controllers

Request a quote

Send us your voltage, capacity, dimensions, certification target and annual volume. Our engineering team returns a proposal within three working days. Start your RFQ or review our custom pack capabilities.

Request a LiFePO4 quote

Tell us your product, volume and specs — our engineering team returns a proposal within three working days.

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