This is a complete energy storage system: a 16kWh LiFePO4 wall-mount battery paired with a 12,000W split-phase hybrid inverter. It's built for whole-home backup, off-grid living, or grid-tied solar installations that need real capacity and real output at the same time.
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.
E-E-A-T Intro
Field techs spend most of their time troubleshooting mismatched components: batteries that can't feed the inverter fast enough, or inverters that overrun the battery's continuous discharge rating. This system removes that guesswork by pairing the EG4 314Ah All-Weather battery directly with the EG4 18kPV inverter as a matched set, with closed-loop communication between the two so the inverter and BMS negotiate limits automatically instead of you calculating them by hand.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate). This is not AGM, Gel, or Flooded lead-acid — it does not require equalization charging and does not off-gas under normal use.
The battery is a wall-mount, all-weather unit rated IP67, meaning it is built for outdoor installation exposed to dust and water intrusion. It includes integrated self-heating for cold-climate charging protection — the pack manages its own internal temperature rather than relying on you to bring it above freezing before charging.
Wiring & Configuration Limits (Series/Parallel)
This system is designed to expand alongside your load requirements: it is compatible with existing EG4 280Ah form-factor systems for mixed-capacity expansion, and the EG4 18kPV inverter supports up to 10 units in parallel for larger commercial or whole-home arrays.
[NEEDS VERIFICATION]: Specific battery-side series/parallel string limits (maximum number of 314Ah battery units per stack or per inverter) are not stated in the source data. Do not assume a string count — confirm with BigBattery before ordering additional battery units for the same inverter.
This battery is not a drop-in replacement for standard lead-acid battery banks and is not intended to be paired with mismatched non-EG4 inverters outside documented compatibility.
Pro-Installer Tip
Undersized or improperly torqued DC cabling between battery and inverter is one of the most common causes of nuisance BMS trips on high-continuous-discharge systems like this one, which is rated for 200A continuous. Loose or high-resistance connections generate heat under sustained load, which can trigger thermal protection lockout and, over time, contribute to cell imbalance from uneven current draw across parallel cell groups. Verify torque specs and connection integrity with a shunt-based battery monitor tracking real-time amperage and voltage sag under load, not just a multimeter snapshot. As a professional standard, plan discharge cycles around 80% DoD to stay inside the manufacturer's 8,000+ cycle life rating — pushing consistently deeper shortens usable service life even on lithium chemistry.
Key Benefits
- 16kWh of usable LiFePO4 storage in a single wall-mount unit
- 8,000+ cycle life rated at 80% depth of discharge
- 200A continuous battery output for high-demand loads
- Smart BMS with active cell balancing
- IP67 outdoor rating with integrated self-heating
- Bluetooth + Wi-Fi remote monitoring with OTA firmware updates
- 12,000W split-phase inverter output with 3 independent MPPT inputs
- 200A AC bypass for whole-home backup configurations
Technical Table
| Spec | Value |
|---|---|
| Chemistry | LiFePO4 |
| Capacity | 314Ah / 16kWh |
| Max Continuous Battery Discharge | 200A |
| Cycle Life | 8,000+ cycles at 80% DoD |
| Enclosure Rating | IP67 (outdoor, all-weather) |
| Cold Weather Protection | Integrated self-heating |
| Inverter Output (Split-Phase) | 12,000W at 240V / 10,400W at 208V |
| Utilized Solar Power | 18,000W |
| Recommended Max Solar Input | 21,000W |
| MPPT Inputs | 3 |
| AC Bypass | 200A |
| Inverter Parallel Capability | Up to 10 units |
| Monitoring | Bluetooth + Wi-Fi, OTA updates |
| Warranty | 10 Years (Battery), 10 Years (Inverter) |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
Compatible with: EG4 280Ah form-factor battery systems for expansion, grid-tied installations, hybrid installations, and off-grid installations. Supports up to 10 EG4 18kPV inverters wired in parallel for scaled deployments.
NOT compatible with: standard lead-acid battery chargers (a LiFePO4-specific charge profile is required); non-EG4 inverters outside documented compatibility; use as a starter or cranking battery. This system is not maintenance-serviceable in the field beyond BMS/monitoring diagnostics — BigBattery states maintenance-free operation under normal use.
Options & SKUs
| Variant | SKU | Price |
|---|---|---|
| variable parent (6 variations) | K0298-V | $7,914.97 |
[NEEDS VERIFICATION]: DATA indicates this parent SKU covers 6 variations, but only one SKU/price was provided. Confirm individual configuration SKUs and pricing with BigBattery before ordering.
FAQ
What chemistry is this battery, and is it safe for indoor or outdoor mounting?
It uses LiFePO4 (Lithium Iron Phosphate) chemistry. The enclosure is IP67-rated for outdoor, all-weather installation.
What is the maximum continuous discharge rate of the battery?
200A continuous output.
Can this battery be charged in cold weather?
Yes. It includes an integrated self-heating function designed for cold-climate operation.
How many inverters can be paralleled together in this system?
The EG4 18kPV inverter supports up to 10 units in parallel.
What is the expected cycle life of the battery?
8,000+ cycles at 80% depth of discharge (DoD).
Warranty & Support
This system carries a 10-year warranty on the battery and a 10-year warranty on the inverter, backed by lifetime USA-based technical support. Ships from Texas, USA. If you have questions about configuration before you order, ask us — we always reply back.
