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Eleven Energy Galvani 4.5kWh Stackable Sodium-Ion Battery – IP65, −20°C, 10-Year Warranty
The Eleven Energy Galvani 4.5 kWh Stackable Sodium-Ion Battery (model ELB-4.5-02) is a modular, stackable sodium-ion battery module for residential and small commercial energy storage. Using sodium-ion chemistry — free of cobalt and lithium — the Galvani charges down to −20°C and discharges down to −30°C, making it suitable for unheated outbuildings, garages and outdoor walls where lithium-ion batteries would fail or require heating. With IP65 ingress protection, up to 4 modules stack vertically per stack (18 kWh), each stack requiring one Base and Junction Box (sold separately). Maximum charge and discharge current is 100A single / 200A multi-module. Depth of discharge is 92% on-grid / 95% off-grid. Compatible exclusively with Eleven Energy Hybrid Inverters. Backed by a 10-year product warranty.
4.5 kWh
Capacity per Module
18 kWh
Max per Stack (×4)
100 A
Max Charge/Discharge
92 / 95%
DoD On/Off-Grid
IP65
Indoor or Outdoor
10 yr
Product Warranty
⚠ Inverter Compatibility: The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from any other brand. Always specify the complete Eleven Energy inverter and battery system together.
ℹ Installation: Must be installed by a qualified electrician accredited for battery storage systems, in accordance with BS 7671 (18th Edition). An earth bond must be installed between the battery stack and the inverter. Do not connect battery cables while the inverter is energised. The mounting wall must be fire-resistant with a minimum thickness of 100mm.
Key Features
Sodium-Ion Chemistry — No Cobalt, No Lithium
The Galvani uses sodium-ion (Na-ion) cell technology — a fundamentally different chemistry from lithium-ion. Sodium is one of the most abundant elements on earth, widely extracted from seawater and soda ash. There is no cobalt, no lithium and none of the ethically and environmentally contested mining associated with conventional battery supply chains. Eleven Energy was founded specifically around sodium-ion technology — the company name itself references sodium's atomic number (11).
Sodium-ionNo cobaltNo lithiumSustainably sourced
Wide Temperature Range: −20°C to +55°C Charging, −30°C to +55°C Discharging
One of the most significant practical advantages of sodium-ion over lithium-ion chemistry is cold-temperature performance. Most lithium-ion batteries begin degrading capacity below 0°C and will not charge safely below freezing. The Galvani charges down to −20°C and discharges down to −30°C without performance loss — making it genuinely suitable for unheated garages, outbuildings, sheds and outdoor enclosures throughout UK winters.
Charges to −20°CDischarges to −30°COutdoor ready
IP65 — Fully Sealed for Indoor or Outdoor Installation
The battery module carries IP65 ingress protection — fully dust-tight and protected against water jets from any direction. Combined with the wide temperature tolerance, this means the Galvani can be permanently installed outdoors on an exterior wall, in a garden cabinet or under a porch without a separate weatherproof enclosure. The junction box shares the same IP65 rating.
IP65Outdoor installationNo enclosure needed
Stackable Up to 4 Modules — 18 kWh per Stack
Up to 4 Galvani modules can be stacked vertically per stack, giving a maximum of 18 kWh per stack (4 × 4.5 kWh). Each stack requires one Base and Junction Box (sold separately). The datasheet also references up to 16 modules connected in future configurations providing up to 66.24 kWh usable capacity — parallel stack connection is planned via a forthcoming parallel cable accessory. The modular format allows installers to commission a system at lower initial cost and add capacity without replacing equipment.
Up to 4 per stack18 kWh max per stackExpandable
High Charge/Discharge Rate — 100 A Single Module, 200 A Multi-Module
A single Galvani module supports a maximum charge and discharge current of 100 A. In a multi-module stack configuration this rises to 200 A, enabling fast response to high-demand loads and rapid solar absorption during peak generation windows. The high current capability also supports use in off-grid applications where instantaneous load demands can be unpredictable.
100A single module200A multi-moduleHigh current
92% DoD On-Grid / 95% DoD Off-Grid
Usable depth of discharge is 92% on-grid and 95% off-grid, meaning that of the 4.5 kWh nominal capacity, approximately 4.14 kWh is available on-grid and 4.28 kWh off-grid per module. The high DoD figures reflect the stability of sodium-ion chemistry — unlike lithium-ion cells, sodium-ion does not experience the same accelerated degradation at high depth-of-discharge, supporting a full cycle every day.
92% DoD on-grid95% DoD off-grid
Eleven Energy Hybrid Inverter Only — Purpose-Built Integration
The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from other manufacturers. This closed ecosystem enables the inverter's purpose-built sodium-ion charging algorithms to operate correctly — including silicon carbide-based high-efficiency conversion, sodium-specific charge management and integration with the Eleven Energy app and cloud EMS platform. Ensure the complete Eleven Energy inverter + battery system is specified together.
Eleven Energy inverters onlyRS485 / CAN comms
10-Year Product Warranty
The Galvani battery carries a 10-year product warranty from Eleven Energy. The battery module includes a built-in ON/OFF switch, an integrated circuit breaker, 6 LED status indicator lights (showing charge level and run/alarm status), a USB Type-C diagnosis port for on-site diagnostics, and a pressure relief valve. RS485 IN and OUT ports support inter-module communication within the stack.
10-Year WarrantyBuilt-in circuit breakerUSB-C diagnostic
Technical Specification (Eleven Energy Datasheet V1.0 — December 2025)
| Electrical | |
| Battery Type | Sodium-ion (Na-ion) |
| Model | ELB-4.5-02 (Galvani) |
| Nominal Capacity | 4.5 kWh |
| Rated Voltage | 45 V |
| Operating Voltage Range | 33 V – 59.2 V |
| Max Charging Current | Single module: 100 A / Multi-module: 200 A |
| Max Discharging Current | Single module: 100 A / Multi-module: 200 A |
| Depth of Discharge | 92% on-grid / 95% off-grid |
| Communication Interface | RS485 / CAN |
| Power Cable (pre-installed) | 35 mm², 2 m (in Junction Box) |
| Environmental | |
| Charging Temperature Range | −20°C to +55°C |
| Discharging Temperature Range | −30°C to +55°C |
| Humidity Range | 5% – 95% |
| IP Rating | IP65 |
| Physical — Battery Module | |
| Dimensions (W × H × D) | 640 × 350 × 250 mm |
| Weight | 59 kg |
| Physical — Junction Box (sold separately) | |
| Dimensions (W × H × D) | 640 × 220 × 250 mm |
| Weight | 11.5 kg |
| Physical — Base (included with Junction Box) | |
| Dimensions (W × H × D) | 640 × 80 × 250 mm |
| Weight | 6 kg |
| Compliance & Warranty | |
| Standards | EN IEC 61000-6, EN IEC 62619 |
| Product Warranty | 10 years |
| Datasheet Version | V1.0 December 2025 |
⚠ Safety: Do not connect battery modules in series. Do not install upside down or sideways. In the event of fire, use dry powder extinguishers only. If the ALM indicator is constantly lit, shut the system down immediately and contact Eleven Energy technical support.
Frequently Asked Questions
Related Products
Eleven Energy Galvani Base & Junction Box
Required — one per battery stack
Eleven Energy 6 kW Hybrid Inverter
Required inverter — Galvani-compatible only
$804.00
Original: $2,297.14
-65%Eleven Energy Galvani 4.5kWh Stackable Sodium-Ion Battery – IP65, −20°C, 10-Year Warranty—
$2,297.14
$804.00Eleven Energy Galvani 4.5kWh Stackable Sodium-Ion Battery – IP65, −20°C, 10-Year Warranty
The Eleven Energy Galvani 4.5 kWh Stackable Sodium-Ion Battery (model ELB-4.5-02) is a modular, stackable sodium-ion battery module for residential and small commercial energy storage. Using sodium-ion chemistry — free of cobalt and lithium — the Galvani charges down to −20°C and discharges down to −30°C, making it suitable for unheated outbuildings, garages and outdoor walls where lithium-ion batteries would fail or require heating. With IP65 ingress protection, up to 4 modules stack vertically per stack (18 kWh), each stack requiring one Base and Junction Box (sold separately). Maximum charge and discharge current is 100A single / 200A multi-module. Depth of discharge is 92% on-grid / 95% off-grid. Compatible exclusively with Eleven Energy Hybrid Inverters. Backed by a 10-year product warranty.
4.5 kWh
Capacity per Module
18 kWh
Max per Stack (×4)
100 A
Max Charge/Discharge
92 / 95%
DoD On/Off-Grid
IP65
Indoor or Outdoor
10 yr
Product Warranty
⚠ Inverter Compatibility: The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from any other brand. Always specify the complete Eleven Energy inverter and battery system together.
ℹ Installation: Must be installed by a qualified electrician accredited for battery storage systems, in accordance with BS 7671 (18th Edition). An earth bond must be installed between the battery stack and the inverter. Do not connect battery cables while the inverter is energised. The mounting wall must be fire-resistant with a minimum thickness of 100mm.
Key Features
Sodium-Ion Chemistry — No Cobalt, No Lithium
The Galvani uses sodium-ion (Na-ion) cell technology — a fundamentally different chemistry from lithium-ion. Sodium is one of the most abundant elements on earth, widely extracted from seawater and soda ash. There is no cobalt, no lithium and none of the ethically and environmentally contested mining associated with conventional battery supply chains. Eleven Energy was founded specifically around sodium-ion technology — the company name itself references sodium's atomic number (11).
Sodium-ionNo cobaltNo lithiumSustainably sourced
Wide Temperature Range: −20°C to +55°C Charging, −30°C to +55°C Discharging
One of the most significant practical advantages of sodium-ion over lithium-ion chemistry is cold-temperature performance. Most lithium-ion batteries begin degrading capacity below 0°C and will not charge safely below freezing. The Galvani charges down to −20°C and discharges down to −30°C without performance loss — making it genuinely suitable for unheated garages, outbuildings, sheds and outdoor enclosures throughout UK winters.
Charges to −20°CDischarges to −30°COutdoor ready
IP65 — Fully Sealed for Indoor or Outdoor Installation
The battery module carries IP65 ingress protection — fully dust-tight and protected against water jets from any direction. Combined with the wide temperature tolerance, this means the Galvani can be permanently installed outdoors on an exterior wall, in a garden cabinet or under a porch without a separate weatherproof enclosure. The junction box shares the same IP65 rating.
IP65Outdoor installationNo enclosure needed
Stackable Up to 4 Modules — 18 kWh per Stack
Up to 4 Galvani modules can be stacked vertically per stack, giving a maximum of 18 kWh per stack (4 × 4.5 kWh). Each stack requires one Base and Junction Box (sold separately). The datasheet also references up to 16 modules connected in future configurations providing up to 66.24 kWh usable capacity — parallel stack connection is planned via a forthcoming parallel cable accessory. The modular format allows installers to commission a system at lower initial cost and add capacity without replacing equipment.
Up to 4 per stack18 kWh max per stackExpandable
High Charge/Discharge Rate — 100 A Single Module, 200 A Multi-Module
A single Galvani module supports a maximum charge and discharge current of 100 A. In a multi-module stack configuration this rises to 200 A, enabling fast response to high-demand loads and rapid solar absorption during peak generation windows. The high current capability also supports use in off-grid applications where instantaneous load demands can be unpredictable.
100A single module200A multi-moduleHigh current
92% DoD On-Grid / 95% DoD Off-Grid
Usable depth of discharge is 92% on-grid and 95% off-grid, meaning that of the 4.5 kWh nominal capacity, approximately 4.14 kWh is available on-grid and 4.28 kWh off-grid per module. The high DoD figures reflect the stability of sodium-ion chemistry — unlike lithium-ion cells, sodium-ion does not experience the same accelerated degradation at high depth-of-discharge, supporting a full cycle every day.
92% DoD on-grid95% DoD off-grid
Eleven Energy Hybrid Inverter Only — Purpose-Built Integration
The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from other manufacturers. This closed ecosystem enables the inverter's purpose-built sodium-ion charging algorithms to operate correctly — including silicon carbide-based high-efficiency conversion, sodium-specific charge management and integration with the Eleven Energy app and cloud EMS platform. Ensure the complete Eleven Energy inverter + battery system is specified together.
Eleven Energy inverters onlyRS485 / CAN comms
10-Year Product Warranty
The Galvani battery carries a 10-year product warranty from Eleven Energy. The battery module includes a built-in ON/OFF switch, an integrated circuit breaker, 6 LED status indicator lights (showing charge level and run/alarm status), a USB Type-C diagnosis port for on-site diagnostics, and a pressure relief valve. RS485 IN and OUT ports support inter-module communication within the stack.
10-Year WarrantyBuilt-in circuit breakerUSB-C diagnostic
Technical Specification (Eleven Energy Datasheet V1.0 — December 2025)
| Electrical | |
| Battery Type | Sodium-ion (Na-ion) |
| Model | ELB-4.5-02 (Galvani) |
| Nominal Capacity | 4.5 kWh |
| Rated Voltage | 45 V |
| Operating Voltage Range | 33 V – 59.2 V |
| Max Charging Current | Single module: 100 A / Multi-module: 200 A |
| Max Discharging Current | Single module: 100 A / Multi-module: 200 A |
| Depth of Discharge | 92% on-grid / 95% off-grid |
| Communication Interface | RS485 / CAN |
| Power Cable (pre-installed) | 35 mm², 2 m (in Junction Box) |
| Environmental | |
| Charging Temperature Range | −20°C to +55°C |
| Discharging Temperature Range | −30°C to +55°C |
| Humidity Range | 5% – 95% |
| IP Rating | IP65 |
| Physical — Battery Module | |
| Dimensions (W × H × D) | 640 × 350 × 250 mm |
| Weight | 59 kg |
| Physical — Junction Box (sold separately) | |
| Dimensions (W × H × D) | 640 × 220 × 250 mm |
| Weight | 11.5 kg |
| Physical — Base (included with Junction Box) | |
| Dimensions (W × H × D) | 640 × 80 × 250 mm |
| Weight | 6 kg |
| Compliance & Warranty | |
| Standards | EN IEC 61000-6, EN IEC 62619 |
| Product Warranty | 10 years |
| Datasheet Version | V1.0 December 2025 |
⚠ Safety: Do not connect battery modules in series. Do not install upside down or sideways. In the event of fire, use dry powder extinguishers only. If the ALM indicator is constantly lit, shut the system down immediately and contact Eleven Energy technical support.
Frequently Asked Questions
Related Products
Eleven Energy Galvani Base & Junction Box
Required — one per battery stack
Eleven Energy 6 kW Hybrid Inverter
Required inverter — Galvani-compatible only
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Eleven Energy Galvani 4.5 kWh Stackable Sodium-Ion Battery (model ELB-4.5-02) is a modular, stackable sodium-ion battery module for residential and small commercial energy storage. Using sodium-ion chemistry — free of cobalt and lithium — the Galvani charges down to −20°C and discharges down to −30°C, making it suitable for unheated outbuildings, garages and outdoor walls where lithium-ion batteries would fail or require heating. With IP65 ingress protection, up to 4 modules stack vertically per stack (18 kWh), each stack requiring one Base and Junction Box (sold separately). Maximum charge and discharge current is 100A single / 200A multi-module. Depth of discharge is 92% on-grid / 95% off-grid. Compatible exclusively with Eleven Energy Hybrid Inverters. Backed by a 10-year product warranty.
4.5 kWh
Capacity per Module
18 kWh
Max per Stack (×4)
100 A
Max Charge/Discharge
92 / 95%
DoD On/Off-Grid
IP65
Indoor or Outdoor
10 yr
Product Warranty
⚠ Inverter Compatibility: The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from any other brand. Always specify the complete Eleven Energy inverter and battery system together.
ℹ Installation: Must be installed by a qualified electrician accredited for battery storage systems, in accordance with BS 7671 (18th Edition). An earth bond must be installed between the battery stack and the inverter. Do not connect battery cables while the inverter is energised. The mounting wall must be fire-resistant with a minimum thickness of 100mm.
Key Features
Sodium-Ion Chemistry — No Cobalt, No Lithium
The Galvani uses sodium-ion (Na-ion) cell technology — a fundamentally different chemistry from lithium-ion. Sodium is one of the most abundant elements on earth, widely extracted from seawater and soda ash. There is no cobalt, no lithium and none of the ethically and environmentally contested mining associated with conventional battery supply chains. Eleven Energy was founded specifically around sodium-ion technology — the company name itself references sodium's atomic number (11).
Sodium-ionNo cobaltNo lithiumSustainably sourced
Wide Temperature Range: −20°C to +55°C Charging, −30°C to +55°C Discharging
One of the most significant practical advantages of sodium-ion over lithium-ion chemistry is cold-temperature performance. Most lithium-ion batteries begin degrading capacity below 0°C and will not charge safely below freezing. The Galvani charges down to −20°C and discharges down to −30°C without performance loss — making it genuinely suitable for unheated garages, outbuildings, sheds and outdoor enclosures throughout UK winters.
Charges to −20°CDischarges to −30°COutdoor ready
IP65 — Fully Sealed for Indoor or Outdoor Installation
The battery module carries IP65 ingress protection — fully dust-tight and protected against water jets from any direction. Combined with the wide temperature tolerance, this means the Galvani can be permanently installed outdoors on an exterior wall, in a garden cabinet or under a porch without a separate weatherproof enclosure. The junction box shares the same IP65 rating.
IP65Outdoor installationNo enclosure needed
Stackable Up to 4 Modules — 18 kWh per Stack
Up to 4 Galvani modules can be stacked vertically per stack, giving a maximum of 18 kWh per stack (4 × 4.5 kWh). Each stack requires one Base and Junction Box (sold separately). The datasheet also references up to 16 modules connected in future configurations providing up to 66.24 kWh usable capacity — parallel stack connection is planned via a forthcoming parallel cable accessory. The modular format allows installers to commission a system at lower initial cost and add capacity without replacing equipment.
Up to 4 per stack18 kWh max per stackExpandable
High Charge/Discharge Rate — 100 A Single Module, 200 A Multi-Module
A single Galvani module supports a maximum charge and discharge current of 100 A. In a multi-module stack configuration this rises to 200 A, enabling fast response to high-demand loads and rapid solar absorption during peak generation windows. The high current capability also supports use in off-grid applications where instantaneous load demands can be unpredictable.
100A single module200A multi-moduleHigh current
92% DoD On-Grid / 95% DoD Off-Grid
Usable depth of discharge is 92% on-grid and 95% off-grid, meaning that of the 4.5 kWh nominal capacity, approximately 4.14 kWh is available on-grid and 4.28 kWh off-grid per module. The high DoD figures reflect the stability of sodium-ion chemistry — unlike lithium-ion cells, sodium-ion does not experience the same accelerated degradation at high depth-of-discharge, supporting a full cycle every day.
92% DoD on-grid95% DoD off-grid
Eleven Energy Hybrid Inverter Only — Purpose-Built Integration
The Galvani Stackable battery is exclusively compatible with Eleven Energy Hybrid Inverters. It cannot be connected to inverters from other manufacturers. This closed ecosystem enables the inverter's purpose-built sodium-ion charging algorithms to operate correctly — including silicon carbide-based high-efficiency conversion, sodium-specific charge management and integration with the Eleven Energy app and cloud EMS platform. Ensure the complete Eleven Energy inverter + battery system is specified together.
Eleven Energy inverters onlyRS485 / CAN comms
10-Year Product Warranty
The Galvani battery carries a 10-year product warranty from Eleven Energy. The battery module includes a built-in ON/OFF switch, an integrated circuit breaker, 6 LED status indicator lights (showing charge level and run/alarm status), a USB Type-C diagnosis port for on-site diagnostics, and a pressure relief valve. RS485 IN and OUT ports support inter-module communication within the stack.
10-Year WarrantyBuilt-in circuit breakerUSB-C diagnostic
Technical Specification (Eleven Energy Datasheet V1.0 — December 2025)
| Electrical | |
| Battery Type | Sodium-ion (Na-ion) |
| Model | ELB-4.5-02 (Galvani) |
| Nominal Capacity | 4.5 kWh |
| Rated Voltage | 45 V |
| Operating Voltage Range | 33 V – 59.2 V |
| Max Charging Current | Single module: 100 A / Multi-module: 200 A |
| Max Discharging Current | Single module: 100 A / Multi-module: 200 A |
| Depth of Discharge | 92% on-grid / 95% off-grid |
| Communication Interface | RS485 / CAN |
| Power Cable (pre-installed) | 35 mm², 2 m (in Junction Box) |
| Environmental | |
| Charging Temperature Range | −20°C to +55°C |
| Discharging Temperature Range | −30°C to +55°C |
| Humidity Range | 5% – 95% |
| IP Rating | IP65 |
| Physical — Battery Module | |
| Dimensions (W × H × D) | 640 × 350 × 250 mm |
| Weight | 59 kg |
| Physical — Junction Box (sold separately) | |
| Dimensions (W × H × D) | 640 × 220 × 250 mm |
| Weight | 11.5 kg |
| Physical — Base (included with Junction Box) | |
| Dimensions (W × H × D) | 640 × 80 × 250 mm |
| Weight | 6 kg |
| Compliance & Warranty | |
| Standards | EN IEC 61000-6, EN IEC 62619 |
| Product Warranty | 10 years |
| Datasheet Version | V1.0 December 2025 |
⚠ Safety: Do not connect battery modules in series. Do not install upside down or sideways. In the event of fire, use dry powder extinguishers only. If the ALM indicator is constantly lit, shut the system down immediately and contact Eleven Energy technical support.
Frequently Asked Questions
Related Products
Eleven Energy Galvani Base & Junction Box
Required — one per battery stack
Eleven Energy 6 kW Hybrid Inverter
Required inverter — Galvani-compatible only
