EG4 WallMount 314Ah Indoor vs All-Weather
Same 16 kWh pack, same 314Ah capacity, same discharge ratings. What differs is the box around it, and with it where it can live, how much it weighs…
EG4 WallMount 314Ah IndoorWall-mount LFP battery16 kWh energy51.2 VDC battery314 Ah capacity0 datasheet edges
EG4 WallMount 314Ah All-WeatherWall-mount LFP battery16 kWh energy51.2 VDC battery314 Ah capacity0 datasheet edgesDatasheet scoreboard: 5 lines where both datasheets list a number. It counts who has the bigger (or, for idle draw, smaller) figure; it is not a quality rating and says nothing about reliability.
The short version
The same pack in two boxes: IP20 for indoors, IP67 for outdoors.
- WallMount 314Ah: The battery goes in a dry, enclosed indoor space such as a utility room or closed garage.
- WallMount 314Ah AW: The battery must be outside or in a damp location.
Same 16 kWh pack, same 314Ah capacity, same discharge ratings. What differs is the box around it, and with it where it can live, how much it weighs and which certification lines the maker prints.
EG4 WallMount 314Ah Indoor vs All-Weather: specs head to head
| Spec | EG4 WallMount 314Ah Indoor | EG4 WallMount 314Ah All-Weather |
|---|---|---|
| Model number | WM-48-314-IN-XX / WM48314INXX | WM48314AWXX |
| Nominal energy | 16 kWh | 16 kWh |
| Usable energy | 12.86 kWh (80% recommended) | 12.86 kWh (80% recommended) |
| Nominal voltage | 51.2 VDC | 51.2 VDC |
| Capacity | 314 Ah | 314 Ah |
| Max continuous / recommended charge current | 157 A / 157 A | 157 A / 157 A |
| Max continuous / recommended discharge current | 200 A / 157 A | 200 A / 157 A |
| Continuous charge / discharge power | 8 / 10.2 kW | 8 / 10.2 kW |
| Round-trip efficiency | 95% | 95% |
| Max parallel units | 32 | 32 |
| Enclosure rating | IP20 | IP67 |
| Heater power consumption | 448 W | 448 W |
| Operating temperature (charging) | 32 – 122 °F (0 – 50 °C) | 32 – 122 °F (0 – 50 °C) |
| Warranty (as listed) | 10 years or 10,000 cycles | 10 years or 10,000 cycles |
| Weight | 293.2 lbs (133 kg) | 309 lbs (140 kg) |
| Dimensions (H×W×D) | 34.1×18.1×9.6 in (865×460×245 mm) | 34.6×21.7×9.3 in (880×550×235 mm) |
Highlighted = the better figure where both datasheets give a number (higher is better, except idle draw). More is not always better: a larger solar input, for example, needs a bigger battery and wiring to use it. Sources: EG4 WallMount 314Ah Indoor datasheet · EG4 WallMount 314Ah All-Weather datasheet. Checked September 30, 2026. “Not on datasheet” means the sheet does not list that line, not that the product lacks it.
What the WallMount 314Ah and WallMount 314Ah AW numbers mean
- Enclosure: IP20 on the indoor model, IP67 on the all-weather model.
- Weight: 293.2 lbs against 309 lbs.
- Certifications listed by the maker: UL 1973, UL 9540A and UL 9540 with FlexBOSS21 and FlexBOSS18 for the indoor model; UL 1973, UL 9540A and UL 9540 for the all-weather model.
- Shared: 16 kWh nominal energy, 12.86 kWh recommended usable (80%), 51.2 V, 314 Ah, 200 A maximum discharge with 157 A recommended, 95% round-trip efficiency, up to 32 units in parallel, a 10 year or 10,000 cycle warranty.
- Cold: both datasheets list a 448 W heater and charging between 32 and 122 °F.
WallMount 314Ah or WallMount 314Ah AW: who should pick which
Pick the WallMount 314Ah if…
- The battery goes in a dry, enclosed indoor space such as a utility room or closed garage.
- You want the slightly lighter unit.
Pick the WallMount 314Ah AW if…
- The battery must be outside or in a damp location.
- You need the IP67 enclosure the datasheet lists.
EG4 WallMount 314Ah Indoor vs All-Weather: questions people ask
Are the discharge ratings different?
No. Both list 200 A maximum continuous and 157 A recommended.
Does the all-weather model need a heater?
Both models list a heater of 448 W that warms the cells in cold weather; check the datasheets for the temperature limits before choosing a location.
Specs change with new revisions; check the current datasheets before you buy. Checked 2026-09-30. Next: size a system or compare any two models.