01
Space-efficient
A shallow enclosure keeps the battery practical for utility rooms and compact home installations.
Compact Home Energy Storage
E-STONE 5.1kWh Home Battery
A slim 51.2V LiFePO4 battery designed for solar self-consumption, essential-load backup and homes that need useful capacity without a bulky installation.
Compare this product family
- Cell chemistry
- LFP (LiFePO4)
- Energy
- 5.32 kWh
- Nominal voltage
- 51.2 V
1 / 6Product overview
What this product is designed to do
E-STONE 5.1 is a compact 51.2V LiFePO4 home battery for customers who want to store daytime solar generation, support selected household circuits and keep installation space under control. Its shallow enclosure can be wall-mounted or floor-standing in a protected indoor utility area.
This model is best suited to apartments, smaller homes and first-stage solar storage projects where essential loads matter more than long whole-home backup. The battery communicates through CAN, RS485 or RS232, but the inverter model and protocol must be confirmed before ordering.
Choose it when one 5kWh-class battery matches the daily energy window. Consider E-STONE 16.0 when the protected load, evening consumption or target backup time clearly exceeds a compact battery's practical range.
Before ordering
Confirm the inverter model, communication protocol, protected load and target backup time.
Product advantages
Advantages tied to real decisions
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Solar self-use
Stores daytime PV generation for evening loads when paired with a compatible inverter.
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Expandable
Parallel support gives the system a clear path for future household demand.
Selection logic
Choose by application and system requirements
Daily solar self-use
Store surplus PV energy during the day and use it for selected evening loads.
Essential-load backup
Support lighting, communications and other planned circuits through a compatible backup inverter.
Space-conscious installation
Use a shallow wall or floor arrangement in a protected utility area.
Verified technical data
E-STONE 5.1kWh Home Battery technical specifications
Confirm the current datasheet, model scope and project conditions before specification or quotation.
| Electrical specification | E-STONE 5.1kWh Home Battery |
|---|---|
| Cell chemistry | LFP (LiFePO4) |
| Energy | 5.32 kWh |
| Nominal voltage | 51.2 V |
| Operating voltage | 45.6–56.16 V |
| Output current | 100 A / 50 A |
| BMS protection current | 110 A, 1 s |
| Communication | CAN / RS485 / RS232 |
| Cell certifications | UN38.3 / IEC 62619 / UL 1642 |
| Battery pack certifications | UN38.3 / IEC 62619 / IEC 61000 / UKCA |
| Display | SOC status display and LED indicators |
| Cycle life | 6,000 cycles @ 80% DoD, 25°C, 0.5C, 60% EOL |
| Parallel support | Up to 15 units |
| Operating modes | Grid-connected / grid-connected + standby / off-grid |
| Inverter compatibility | Major PCS brands; confirm against the compatibility list |
| Test condition | 100% DoD; charge/discharge at 0.2C and 25°C |
| Mechanical and environmental | E-STONE 5.1kWh Home Battery |
|---|---|
| Dimensions (W × D × H) | 450 × 150 × 533 mm (17.7 × 5.90 × 20.9 in) |
| Weight | 46 kg (101 lb) |
| Installation | Wall-mounted or floor-mounted |
| Ingress protection | IP20 |
| Operating temperature | −20°C to 60°C |
| Ambient humidity | ≤95% RH |
| Temperature derating | Applies from −10°C to 5°C and from 45°C to 55°C |
Test note: the brochure states cycle testing at 100% discharge depth and 0.2C at 25°C, while the service-life row states 6,000 cycles at 80% DoD, 25°C, 0.5C and 60% EOL. These conditions are shown separately to avoid merging two different statements.
Installation and expansion
Plan installation and expansion together
Confirm the installation area
Check the mounting or floor support, ventilation, service access and the permitted operating environment before installation.
Confirm inverter compatibility
Match the battery voltage range, current settings and communication protocol to the exact inverter model and firmware.
Define parallel quantity
Plan cable sizing, protection devices, inverter limits and the commissioning sequence together with the required capacity.
Commission and document settings
Record battery addresses, communication wiring, charge and discharge limits, and firmware versions for later service.
Compatibility and documents
Verify compatibility before ordering
- 51.2V battery input range
- Approved CAN or RS485 protocol
- Charge and discharge current within battery limits
Compliance documentation
Cell references include UN38.3, IEC 62619 and UL 1642. Pack references include UN38.3, IEC 62619, IEC 61000 and UKCA. Confirm the current certificate, model scope and document availability before specifying or tendering.
Project fit
Where E-STONE 5.1kWh Home Battery fits best
Good fit
- Apartments and compact homes
- Daily solar self-use
- Essential-load backup
Review another format
- Long whole-home backup with large electric loads
- Unprotected outdoor installation
- Projects requiring a high-voltage battery platform
Frequently asked questions
Common questions before you choose
Is E-STONE 5.1 suitable for a whole home?
It depends on the home's peak load and required backup time. It is commonly selected for essential circuits or modest daily consumption; a load calculation should be completed first.
Can the battery be expanded later?
Yes. The brochure specifies support for up to 15 parallel units. The final quantity must also comply with the inverter and system design.
Can it work with a hybrid inverter?
Yes, when voltage and CAN or RS485 communication are compatible. Confirm the inverter model and protocol before shipment.
Can it be installed outdoors?
The listed protection class is IP20, so it should be installed in a protected indoor location unless a suitable external enclosure is provided.
Does it support backup during outages?
The battery can support backup when paired with an inverter that provides EPS or off-grid output. Backup duration depends on the connected load.
What information is needed for selection?
Share daily energy use, peak load, backup circuits, inverter model, installation location and preferred expansion plan.
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Project review
Confirm the product against your actual project
Share the application, electrical platform, load, capacity, runtime and installation location.