This listing covers the EG4 WallMount 314Ah All Weather Battery paired with the 12000XP Inverter V2, built for off-grid and whole-home energy storage. The battery uses LiFePO4 (Lithium Iron Phosphate) chemistry and is designed to slot into the same footprint as 280Ah wall-mount batteries, so upgrading an existing bank does not require new brackets or enclosures.
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.
Field Perspective: What This System Is For
Off-grid and whole-home backup buyers care about two things above all: how much usable energy is stored, and whether it survives real-world temperature swings without babysitting. The "All Weather" designation on this WallMount 314Ah signals it's built for enclosures that aren't climate-controlled — garages, sheds, outdoor battery cabinets. This pairing with the 12000XP Inverter V2 is aimed at whole-home Energy Storage System (ESS) builds, not small backup circuits.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate). This chemistry is chosen for off-grid storage because it tolerates deep, frequent cycling without the sulfation issues that shorten the life of flooded or AGM lead-acid batteries. The WallMount 314Ah shares the same physical footprint as the common 280Ah wall-mount form factor, which matters if you're adding capacity to an existing rack or wall bracket system rather than starting fresh.
Wiring & Configuration Limits
The WallMount 314Ah is designed to integrate into whole-home ESS setups alongside compatible EG4 hardware such as the FlexBOSS21 and 18kPV. [NEEDS VERIFICATION] — specific series/parallel stacking limits (maximum units in series and in parallel) were not provided in the source data for this listing. Do not assume a series or parallel count beyond what your system's inverter and BMS documentation confirms.
This unit is NOT confirmed compatible with all inverter brands — pairing outside the EG4 ecosystem (FlexBOSS21, 18kPV, 12000XP) has not been verified in the data provided. Do not mix this battery with older 280Ah units of a different age or cycle history in the same string without confirming compatibility first.
Pro-Installer Tip
Wall-mount LiFePO4 batteries stacked in series or parallel without matched state-of-charge invite cell imbalance — one weak module drags down the whole string's usable capacity over time. Before commissioning a multi-unit bank, charge every unit to 100% independently and let the BMS balance cells before wiring them together. A shunt-based battery monitor at the DC bus lets you confirm the whole bank is charging and discharging as one unit, not fighting itself. For daily cycling, plan around 80-100% depth of discharge, which is standard for LiFePO4, but confirm your specific charge controller or inverter settings match the battery's BMS charge voltage before first use.
Key Benefits
- 314Ah capacity per unit — an increase in stored energy over the prior-generation WallMount batteries, per manufacturer data.
- All Weather rating intended for non-climate-controlled installation locations.
- Drop-in physical compatibility with the 280Ah wall-mount form factor for easier retrofits.
- Designed to pair with EG4 FlexBOSS21 and 18kPV for whole-home ESS builds.
- Bundled 12000XP Inverter V2 for a matched battery-plus-inverter off-grid package.
Technical Table
| Spec | Value |
|---|---|
| Chemistry | LiFePO4 (Lithium Iron Phosphate) |
| Capacity | 314Ah |
| Form Factor Compatibility | 280Ah wall-mount footprint |
| Bundled Inverter | 12000XP Inverter V2 |
| Primary SKU | K0273-V |
| Voltage | [NEEDS VERIFICATION] |
| Watt-hours (Wh) | [NEEDS VERIFICATION] |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Peak Discharge | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Operating Temperature Range | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
| Low-Temperature Charging Protection | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Options & SKUs
| Variant | SKU | Price |
|---|---|---|
| variable parent (7 variations) | K0273-V | $6009.96 |
This listing's parent SKU covers 7 underlying variations per manufacturer data; individual variant SKUs, capacities, or price breakdowns beyond the base K0273-V were not provided. Ask us before you order if you need a specific configuration confirmed.
Compatibility & Fitment
Compatible with: 280Ah wall-mount battery installation footprints; EG4 FlexBOSS21 and 18kPV systems for whole-home ESS configurations, per manufacturer data.
NOT confirmed compatible with: standard lead-acid chargers (LiFePO4 batteries require a charger or charge controller matched to LiFePO4 voltage curves — do not use a standard lead-acid charger on this battery). Series/parallel stacking limits beyond what's stated here are NOT verified — confirm with system documentation before wiring multiple units together. This is not documented as a starter battery and should not be used as one.
FAQ
What chemistry does the EG4 WallMount 314Ah battery use?
It uses LiFePO4 (Lithium Iron Phosphate) chemistry.
Will this battery fit in a system built around 280Ah wall-mount batteries?
Yes. The WallMount 314Ah shares the 280Ah form factor, so it fits into existing wall-mount brackets and enclosures sized for that footprint.
What inverter is included with this listing?
The listing bundles the 12000XP Inverter V2 with the battery.
Can I mix this battery with older 280Ah units in the same bank?
This has not been confirmed in manufacturer data provided to us. Do not mix batteries of different ages or cycle histories in the same string without confirming compatibility with the manufacturer first.
Is this battery rated for outdoor or unconditioned spaces?
It is marketed as an "All Weather" version, intended for non-climate-controlled installation locations. Specific operating temperature range was not provided in source data — refer to the Resources tab for manufacturer specifications.
Warranty & Support
Warranty terms for this system are documented in the manufacturer materials — see the "Resources (System Manuals and Warranty)" Tab above for full coverage details. If you have questions about this bundle before ordering, ask us — we always reply back.
