The Eleven Volta ELB-4.5 is a 4.5kWh sodium-ion battery designed for homes that want compact battery storage with flexible installation options. Installed from £1890, this version is suited to setups where a single battery pack with battery box or enclosure makes more sense than a stackable modular tower.
It is a simpler option for customers who want Eleven sodium battery storage in a more compact form, while still keeping the ability to expand capacity later if needed.
The Volta ELB-4.5 battery can be wall-mounted or rack-mounted, and can also be installed using an optional outdoor enclosure. On its own, the battery is rated IP20, while the optional outdoor battery box gives a weather-protected installation option where required.
That makes this product a better fit for customers who want more flexibility over where and how the battery is installed.
The battery provides 4.5kWh of capacity and uses sodium-ion battery technology. Rated voltage is 45V, with an operating voltage range of 33V to 59.2V, and maximum charging and discharging current up to 100A.
The Volta ELB-4.5 can be expanded up to eight battery packs, giving up to 33.12kWh of usable capacity. That makes it suitable for customers who want to start with a smaller battery system and scale up later without jumping straight to a full stackable tower format.
The battery itself is IP20 rated, so the outdoor enclosure matters here. If the battery needs to be installed in a location that requires greater weather protection, Eleven offers an optional dual battery pack outdoor enclosure measuring 640 x 660 x 400mm.
That distinction matters on the product page. The battery itself is not the same as the IP65 Galvani stackable system. The weather protection comes through the optional battery box.
The Eleven 4.5kWh Battery + Battery Box is a strong fit for households that want:
If you want Eleven sodium battery storage in a more compact format, with the option to add an enclosure for outdoor installation, this is the neater entry point.
| Specification | Details |
|---|---|
| Model | Eleven Volta ELB-4.5 |
| Battery Type | Sodium-ion |
| Capacity | 4.5kWh |
| Max Charge / Discharge Current | 100A / 100A |
| Rated Voltage | 45V |
| Operating Voltage Range | 33V – 59.2V |
| Depth of Discharge | 92% on-grid / 95% off-grid |
| Charging Temperature | -20°C to 55°C |
| Discharging Temperature | -30°C to 55°C |
| IP Rating | IP20 battery pack |
| Dimensions | 550 x 525 x 155mm |
| Weight | 54.5kg |
| Installation | Wall-mount / rack-mount / optional IP65 outdoor enclosure |
| Interface | RS485 / CAN |
| Expandability | Up to 8 battery packs, 33.12kWh usable capacity |
| Optional Outdoor Enclosure | Dual battery pack enclosure, 640 x 660 x 400mm |
| Warranty | 10 years |
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