The EAGLE 2 is a 36V LiFePO4 battery built by BigBattery, rated at 1.54kWh, with a built-in heater and CANBus communication. This page covers what's confirmed in the manufacturer data and flags what is not.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate). Voltage: 36V nominal. Capacity: 1.54kWh. This unit includes an internal heater and CANBus communication capability, per the manufacturer title. Beyond these facts, BigBattery's source page for this listing did not provide additional specification text — see the flags in Warnings below and confirm details via the Resources tab before ordering.
[NEEDS VERIFICATION]: Amp-hour (Ah) rating, BMS max continuous discharge/charge amps, peak discharge amps, cycle life, physical dimensions, weight, terminal type, and operating temperature range were not present in the supplied data and are not stated here.
Wiring & Configuration Limits (Series/Parallel)
[NEEDS VERIFICATION]: The manufacturer data provided for this listing does not state maximum series or parallel expansion limits for the EAGLE 2. Do not assume series/parallel compatibility with other BigBattery models without confirming in the manufacturer documentation referenced in the Resources tab. Do not wire this battery in series or parallel with unconfirmed configurations or with batteries of different age, capacity, or chemistry.
Pro-Installer Tip
Cold-weather charging is the most common cause of unexplained capacity loss in LiFePO4 systems. Charging a lithium cell below freezing plates metallic lithium on the anode instead of intercalating it properly, and that damage does not reverse — it shows up later as reduced capacity or a BMS lockout you can't clear with a reset. This unit includes a built-in heater specifically to address that risk, so confirm the heater is wired and enabled before the first cold-season charge, not after you notice a problem. Verify state of charge and pack temperature with a shunt-based battery monitor rather than relying on the built-in fuel gauge alone, and until BigBattery's documentation confirms otherwise, treat this battery under standard LiFePO4 discharge practice: keep cycling in the 80-100% DoD range rather than routinely draining to zero.
Key Benefits
- LiFePO4 chemistry — more stable and longer-lived than lead-acid under repeated cycling.
- Built-in heater for cold-climate operation, addressing the freezing-charge failure mode common to lithium batteries.
- CANBus communication for integration with compatible inverters and monitoring systems.
- 36V nominal configuration, 1.54kWh rated capacity.
Technical Table
| Spec | Value |
|---|---|
| Voltage | 36V nominal |
| Capacity | 1.54kWh |
| Chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Heater | Included (built-in) |
| Communication | CANBus |
| Model / SKU | FEAGL-36015-G2 |
| Ah rating | [NEEDS VERIFICATION] |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Peak Discharge (A) | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
| Operating Temp Range | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
This battery is intended for 36V off-grid or equipment storage applications compatible with its CANBus communication protocol, per the manufacturer title. It is NOT confirmed for use as a starter battery. Do NOT charge this battery with a standard lead-acid charger — LiFePO4 packs require a charger matched to their voltage profile and BMS communication requirements; confirm the correct charger via the Resources tab before use. Series/parallel expansion limits, compatible inverter models, and compatible chargers are [NEEDS VERIFICATION] — do not assume compatibility with other BigBattery products, mounting hardware, or third-party chargers without confirming first.
FAQ
What chemistry is the EAGLE 2 battery?
It uses LiFePO4 (Lithium Iron Phosphate) chemistry.
Does this battery have cold-weather charging protection?
Yes. It includes a built-in heater. Specific low-temperature disconnect thresholds are not stated in the available manufacturer data — confirm details in the Resources tab before charging in freezing conditions.
What is the rated capacity?
1.54kWh at 36V nominal.
Can I wire multiple EAGLE 2 units in series or parallel?
Series and parallel expansion limits were not provided in the manufacturer data for this listing. Do not wire units together until you've confirmed configuration limits in the manufacturer documentation.
Can I charge this with a standard lead-acid charger?
No. Standard lead-acid chargers are not recommended for LiFePO4 batteries. Use a charger confirmed compatible with this battery's BMS and voltage profile.
Warranty & Support
Warranty terms for the EAGLE 2 are not included in the data provided for this listing. Refer to the "Resources (System Manuals and Warranty)" Tab above for the manufacturer's warranty document. If you have questions before ordering, ask us — we always reply back.
