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A slim 51.2V LiFePO4 battery designed for solar self-consumption, essential-load backup and homes that need useful capacity without a bulky installation.
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.
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Compact Home Energy Storage
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Cell chemistryLFP (LiFePO4)
Energy5.32kWh
Nominal voltage51.2V
Product overview
What this product is designed to do
A practical explanation of the product, intended customer and role in the energy system.
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.
Customer value
Advantages tied to real decisions
No generic claims: each point explains a practical selection, installation or operating benefit.
01
Space-efficient
A shallow enclosure keeps the battery practical for utility rooms and compact home installations.
02
Solar self-use
Stores daytime PV generation for evening loads when paired with a compatible inverter.
03
Expandable
Parallel support gives the system a clear path for future household demand.
Verified technical data
Technical specifications
One complete, copyable table. Unverified values remain clearly gated.
Swipe to view full specificationsRequest parameter confirmation
| Specification | Value |
|---|---|
| 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 |
| 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 |
| 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 |
| Operating temperature | −20°C to 60°C |
| Ambient humidity | ≤95% RH |
| 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 |
| Temperature derating | Applies from −10°C to 5°C and from 45°C to 55°C |
Clear product selection
Is this product right for your project?
These conditions help buyers rule the model in or out before detailed engineering.
Application scenarios
Application 01
Application 02
Application 03
Where this product creates value
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.
System compatibility
Confirm these points before ordering
Compatibility is determined by the complete electrical and communication design, not the product name alone.
- 51.2V battery input range
- Approved CAN or RS485 protocol
- Charge and discharge current within battery limits
Technical documents
Downloads reserved for verified files
Datasheets, manuals and certificates will appear here only after document verification.
Document package in preparation
No placeholder or unverified files are published. Contact the team to request the currently available documents for E-STONE 5.1.
Product-specific FAQ
Questions customers ask before selection
Direct answers with the conditions that affect the final recommendation.
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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