This is a 48V, 314Ah LiFePO4 wall-mount battery built for off-grid and whole-home energy storage. It is the all-weather version, designed to hold up outside the conditioned space of a home. Below you'll find the numbers you need to size it, wire it, and keep it healthy for years.
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.
Why This Matters
A wall-mount lithium battery is only as good as its BMS logic and its ability to slot into a real system without guesswork. This WallMount 314Ah unit uses active cell balancing, which spreads charge and discharge load evenly across cells instead of letting weaker cells drag the pack down early. It's also built in the 280Ah form factor footprint, so it can bolt into existing WallMount racks and enclosures without a redesign. That's a practical detail: it means you can expand an existing bank without ripping out your mounting hardware.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate). This is not AGM, Gel, or Flooded Lead-Acid — it does not sulfate, and it does not require equalization charging.
This is the All-Weather variant, meaning it is built for outdoor/unconditioned installation environments rather than indoor-only placement. [NEEDS VERIFICATION: specific IP/weatherproof rating not provided in source data]
Form factor: compatible with the 280Ah WallMount footprint, meaning it can be installed alongside or in place of 280Ah WallMount units in an existing rack or enclosure.
Wiring & Configuration Limits
This battery is compatible with other WallMount batteries for building larger banks. Manufacturer data provided does not specify a maximum series or parallel string count for this model.
[NEEDS VERIFICATION: maximum series count, maximum parallel count]
Do NOT mix this battery with lead-acid, AGM, Gel, or Flooded batteries in the same bank. Do NOT mix batteries of different ages or differing charge cycles in the same string — this leads to cell imbalance and premature capacity loss.
Pro-Installer Tip
Parallel banks of lithium wall-mount batteries are the most common source of return-worthy install mistakes. When batteries at different states of charge are connected in parallel, current rushes to equalize between packs the instant the connection is made, which stresses the BMS and can trip a protection lockout before the system ever powers a load. Balance every battery to the same voltage before tying them together, and verify pack-to-pack voltage with a shunt-based battery monitor rather than a multimeter snapshot alone — a shunt tracks amp-hours in and out over time, not just a single voltage reading. Once installed, size your loads and generator charge schedule around an 80-100% depth of discharge, which is the standard operating range for LiFePO4, versus the 50% DoD ceiling you'd plan around for lead-acid.
Key Benefits
- WiFi/Bluetooth connectivity for monitoring pack status remotely
- Active cell balancing logic to prevent individual cell drift over time
- Slots into existing 280Ah WallMount form-factor installations
- Quick-connect terminals for faster installation, plus a bolt-style terminal for ring connections (for accessories such as a Chargeverter)
- Pairs with FlexBOSS21 and 18kPV inverter systems for whole-home ESS builds
Technical Table
| Spec | Value |
|---|---|
| Voltage | 48V |
| Capacity | 314Ah |
| Chemistry | LiFePO4 |
| Form Factor | Compatible with 280Ah WallMount footprint |
| Connectivity | WiFi/Bluetooth |
| Terminals | Quick-connect + bolt-style ring terminal |
| SKU | FEWAW-48161-G1 |
[NEEDS VERIFICATION: Watt-hour capacity, max continuous discharge/charge amps, peak discharge, cycle life, dimensions, weight, operating temperature range, cold-weather charging protection details]
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
Compatible with other BigBattery/EG4 WallMount batteries for bank expansion. Compatible with the 280Ah WallMount form factor for slotting into existing racks and enclosures. Pairs with FlexBOSS21 and 18kPV inverter systems for whole-home energy storage system (ESS) builds.
NOT confirmed compatible with any inverter, charge controller, or rack system not listed above. NOT a starter battery — this is a stationary/off-grid storage battery, not designed for engine cranking. Standard lead-acid chargers are NOT recommended for this LiFePO4 battery; use a charger designed for lithium iron phosphate chemistry. Do not wire in series or parallel with non-WallMount or non-lithium batteries.
FAQ
What chemistry is the WallMount 314Ah battery?
It is LiFePO4 (Lithium Iron Phosphate), not AGM, Gel, or Flooded Lead-Acid.
Can I install this battery into an existing 280Ah WallMount system?
Yes. The 314Ah WallMount battery is built in the same 280Ah form factor, so it slots into existing racks and enclosures sized for that footprint.
What inverters does this battery pair with?
Manufacturer data lists compatibility with the FlexBOSS21 and 18kPV for whole-home ESS solutions.
Does this battery have WiFi or Bluetooth monitoring?
Yes. It includes WiFi/Bluetooth connectivity for monitoring the battery.
Can I use this as a starter battery for a vehicle or boat engine?
No. This is an off-grid/home energy storage battery, not rated for engine starting or cranking applications.
Warranty & Support
Warranty terms for this battery are documented by the manufacturer. Please check the "Resources (System Manuals and Warranty)" Tab above for full warranty details before you order. If you have questions about sizing this battery into your system, ask us — we always reply back.
