Product Description

The EG4 WallMount 314Ah All-Weather is a 48V LiFePO4 home backup battery built on 314Ah cells — roughly 16 kWh of storage in a weather-rated wall-mounted enclosure. Suitable for indoor or outdoor installation, it pairs natively with EG4 FlexBOSS and other compatible 48V inverters, and it's the battery used in our FlexBOSS18 and FlexBOSS21 All-Weather kits.

Why the WallMount 314Ah All-Weather

  • ~16 kWh from one unit — the highest-capacity cell in EG4's WallMount line, enough to carry a household overnight from a single battery
  • All-weather enclosure: rated for outdoor mounting, so the battery can live on an exterior wall next to the inverter — no dedicated battery room required
  • Closed-loop communication with EG4 FlexBOSS hybrid inverters for accurate state-of-charge and coordinated charging
  • LiFePO4 chemistry with a built-in battery management system (BMS)
  • Wall-mounted design keeps floors clear; multiple units parallel for 32, 48 kWh and beyond

Who it's for

Homeowners building or expanding a FlexBOSS-based system where outdoor or garage-wall mounting fits best. If the battery will live in an unheated space in a cold climate, compare the WallMount 314Ah Indoor, which adds self-heating for below-freezing charging. Complete pre-matched systems are available as our FlexBOSS18 and FlexBOSS21 All-Weather kits.

Specifications

Nominal voltage 48V
Capacity 314Ah — approximately 16 kWh
Chemistry LiFePO4 (lithium iron phosphate)
Enclosure All-weather, indoor or outdoor mounting
Communication Closed-loop with EG4 FlexBOSS hybrid inverters
Protection Built-in BMS
Expandability Parallel multiple units for greater capacity
SKU FEWAW-48161-G1

Warranty

The EG4 WallMount 314Ah All-Weather carries a 10-year manufacturer warranty — valid for ten years from purchase or 10,000 cycles, whichever comes first. EG4 requires warranty registration within the first year of purchase (or proof of purchase from an authorized distributor) to keep coverage valid.

Common questions

Can it really mount outside?

Yes — the enclosure is weather-rated for outdoor installation. Siting it out of direct afternoon sun helps the pack stay in its ideal temperature range.

All-Weather or Indoor?

Choose All-Weather if the battery must live outside. Choose the Indoor model for garages, basements, and utility rooms — it adds self-heating for reliable charging in unheated cold spaces and carries a UL9540A listing.

Can I parallel more batteries later?

Yes — additional WallMount units can be added to grow the bank; our kits pair one to three with a FlexBOSS inverter.

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