The EG4 WallMount is a 48V LiFePO4 storage battery built for indoor, wall- or floor-mounted installs. It holds 314Ah of capacity, delivers roughly 16kWh nominal energy, and includes a self-heating function for cold environments. Rated for 200A continuous output with 12.8kW peak power, it's sized for whole-home backup loads, not a single small appliance circuit.
Note: Full spec sheets, wiring diagrams, and certification documents for this battery are available in the Resources tab on this page.
Expert Overview
The EG4 WallMount uses a Third-Generation BMS for cell monitoring, balancing precision, and fault response. Chemistry is LiFePO4 (Lithium Iron Phosphate) — the standard for cycle life and thermal stability in stationary off-grid storage. The battery carries UL9540A recognition (noted by the manufacturer as certified only when paired with Flexboss 18 & Flexboss 21 inverters) and is built for indoor installation with a self-heating function for cold-weather protection.
Battery Characteristics
- Chemistry: LiFePO4 (Lithium Iron Phosphate)
- Nominal Voltage: 48V
- Capacity: 314Ah
- Nominal Energy: 16kWh
- Enclosure: IP20-rated, indoor use only, hybrid wall or floor mount design
- Cold-Weather Protection: Self-heating function maintains performance and health in cold environments
Wiring & Configuration Limits
The EG4 WallMount is cross-compatible with other EG4 models, allowing you to scale storage capacity as your system grows. Manufacturer data does not specify a maximum series or parallel count for this model — confirm your target stack size and configuration with an EG4-compatible inverter before ordering. [NEEDS VERIFICATION: max series/parallel count]
NOT for: outdoor installation (indoor-rated enclosure only), use as a cranking/starter battery, or mixing with non-EG4 battery models in the same bank. UL9540A recognition applies only when this battery is used with Flexboss 18 & Flexboss 21 inverters — it is NOT certified to that standard with other inverter pairings.
Pro-Installer Tip
Mixing battery ages or brands in the same bank is the most common cause of premature BMS lockout on lithium systems. Even within the EG4 lineup, pair batteries from the same production run when possible, and let Auto-ID Technology sync new units during install rather than force-adding them to an already-cycled bank. This prevents cell imbalance between packs with different calendar wear. Validate pack health with a shunt-based battery monitor rather than relying on voltage alone — voltage sag under load tells you more about a weak pack than resting voltage ever will. Keep in mind that LiFePO4 chemistry supports 80-100% depth of discharge, so a bank that trips its BMS early is a diagnostic flag, not normal behavior.
Key Benefits
- Third-Generation BMS for advanced monitoring and faster fault response
- Self-heating function protects performance in cold environments
- 200A continuous output / 12.8kW peak power supports heavy household loads and backup operation
- Auto-ID Technology automatically recognizes and syncs new batteries during installation
- Cross-compatible with other EG4 models for flexible scaling
Technical Specifications
| Spec | Value |
|---|---|
| Voltage | 48V |
| Capacity | 314Ah |
| Nominal Energy | 16kWh |
| Chemistry | LiFePO4 |
| Max Continuous Discharge | 200A |
| Peak Power | 12.8kW |
| Enclosure Rating | IP20 |
| Mounting | Wall or Floor Mount |
| Certification | UL9540A (with Flexboss 18 & Flexboss 21 only) |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Specifications provided by the manufacturer. Always verify critical specifications against the manufacturer's datasheet before installation.
Compatibility & Fitment
The EG4 WallMount is cross-compatible with other EG4 battery models for expanded storage. It is designed for indoor installation only (IP20 enclosure) and is NOT rated for outdoor exposure. UL9540A system-level certification applies only when paired with Flexboss 18 & Flexboss 21 inverters — pairing with other inverter brands does NOT carry that certification. This battery is NOT intended for use as a starter/cranking battery. Standard lead-acid chargers are NOT recommended; use charging equipment compatible with LiFePO4 BMS requirements.
FAQ
Is the EG4 WallMount rated for outdoor installation?
No. It carries an IP20 enclosure rating and is designed for indoor, wall- or floor-mounted installation only.
Does UL9540A certification apply with any inverter?
No. The manufacturer notes UL9540A certification applies only when the battery is paired with Flexboss 18 & Flexboss 21 inverters.
Can this battery be used as a starter battery?
No. It is a stationary LiFePO4 storage battery and is not designed for cranking/starter applications.
Does it have cold-weather protection?
Yes. It includes a self-heating function to maintain performance and battery health in cold environments.
Can I mix this with other battery brands in the same bank?
The manufacturer states it is cross-compatible with other EG4 models. Mixing with non-EG4 batteries is not addressed in manufacturer data and is not recommended without verification.
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.
Warranty & Support
This listing references a 10-year warranty per the manufacturer's product title. Detailed warranty terms are not included in the data provided for this listing. [NEEDS VERIFICATION: full warranty terms]
Questions about stacking, inverter pairing, or install layout? Ask us before you order. We always reply back.
