A 51.2V 200Ah wall-mounted LiFePO4 battery pack with 10.24kWh of usable energy storage, built for residential solar systems and home backup power. With RS485/CAN inverter communication and parallel expansion up to 16 units, it pairs naturally with our 51.2V 100Ah wall-mounted battery for 5kWh/10kWh modular home energy storage systems.
Designed for distributors, installers, and project developers serving the residential energy storage market, this unit delivers overnight backup capacity in a space-saving wall-mount enclosure — a practical step up from smaller 5kWh units for households with higher evening loads.
- 10.24kWh capacity — covers typical overnight household consumption
- RS485/CAN communication — works with mainstream hybrid inverters
- Wall-mounted design — saves floor space in garages and utility rooms
- Parallel-ready — expand to 160kWh+ as needs grow
Product Overview
The 51.2V 200Ah wall-mounted battery stores 10.24kWh of energy in a compact enclosure that mounts directly on the wall — no floor footprint, no rack cabinet required. It is aimed at residential solar-plus-storage projects where a single 5kWh unit is not enough to carry the home through the night, but a full rack system would be oversized.
For installers, the key advantage is standardization: the same wall-mount form factor as our 51.2V 100Ah unit, the same RS485/CAN communication interface, and the same parallel architecture. Crews learn one installation procedure and can deploy 5kWh, 10kWh, or multi-unit systems with the same hardware and wiring practice.
- 10.24kWh usable energy — 51.2V nominal × 200Ah capacity
- Inverter communication — RS485 and CAN protocols for SOC reporting and charge control
- Wall-mount bracket included — designed for garage and utility-room installation
- Modular expansion — parallel up to 16 units for larger residential or light-commercial systems
Technical Specifications
| Group | Parameter | Value | Status |
|---|---|---|---|
| Electrical | Model | LJY-51V200AH-WM | Typical |
| Electrical | Nominal voltage | 51.2V (16S LiFePO4) | Typical |
| Electrical | Rated capacity | 200Ah | Typical |
| Electrical | Nominal energy | 10.24kWh | Typical |
| Electrical | Charge cut-off voltage | 58.4V | Typical |
| Electrical | Discharge cut-off voltage | 40V | Typical |
| BMS | Continuous discharge current | 100A | Typical |
| BMS | Peak discharge current | 200A (short duration) | Typical |
| BMS | Protection functions | Over-charge / over-discharge / over-current / short-circuit / over-temperature | Typical |
| BMS | Communication | RS485 + CAN | Typical |
| BMS | Bluetooth monitoring | Optional | Optional |
| BMS | Low-temperature self-heating | Optional | Optional |
| Mechanical | Mounting | Wall-mounted (bracket included) | Typical |
| Mechanical | Enclosure | Steel, indoor-rated | Typical |
| Mechanical | Display | LCD status display | Typical |
| Mechanical | Dimensions | To be confirmed per enclosure revision | To Be Confirmed |
| Mechanical | Weight | Approx. 85–95 kg | Typical |
| Environmental | Charge temperature | 0°C to 55°C | Typical |
| Environmental | Discharge temperature | -20°C to 60°C | Typical |
| Environmental | Cycle life | 6000+ cycles at 80% DOD (reference) | Typical |
| System | Parallel expansion | Up to 16 units | Typical |
| System | Inverter compatibility | Growatt / Deye / Victron / SMA / GoodWe (confirm model) | Typical |
Specifications above are typical reference values for this product family. “To Be Confirmed” items and any project-specific requirements are finalized in the formal quotation. LJY Energy does not publish third-party test reports or certifications for this product; compliance documentation is provided per order as applicable.
Compatibility & Applications
Inverter compatibility
The built-in BMS communicates over RS485 and CAN, supporting closed-loop operation with mainstream hybrid inverters. Confirmed protocol families include Growatt, Deye, Victron, SMA, and GoodWe. Because inverter firmware varies by model and region, we recommend confirming your exact inverter model with us before ordering — we pre-configure communication settings on request.
Typical applications
- Residential solar self-consumption — store daytime PV generation for evening use
- Home backup power — carry essential loads (lighting, refrigeration, communications) through outages
- Time-of-use arbitrage — charge off-peak, discharge during peak-rate hours
- Off-grid homes and cabins — core storage block, expandable in parallel
- Light-commercial backup — small offices, shops, and telecom-adjacent loads via multi-unit parallel
See also: Home Energy Storage solutions and our 48V 100Ah rack-mount battery for cabinet-based installations.
Charging & Compatibility
How to charge
- Use a LiFePO4-compatible charger or hybrid inverter with a 58.4V charge profile
- Recommended charge current: 0.2C–0.5C (40–100A); maximum per BMS rating
- Closed-loop communication lets the inverter manage charge voltage and current automatically
- For parallel systems, charge all units to the same voltage before connecting
When expanding an existing system, add units of the same model and similar state of health. Mixing substantially different ages or capacities in parallel is not recommended — contact us for expansion planning.
Lifespan & Safety
- Long cycle life — LiFePO4 chemistry rated at 6000+ cycles at 80% depth of discharge under reference conditions
- Multi-layer BMS protection — guards against over-charge, over-discharge, over-current, short circuit, and temperature extremes
- Stable chemistry — LiFePO4 offers strong thermal stability compared with other lithium chemistries
- Indoor installation — mount in ventilated indoor locations away from direct heat sources
Cycle-life figures are reference values under controlled conditions; actual lifespan depends on operating temperature, charge rates, and depth of discharge in the field. We do not fabricate test results — performance expectations are discussed against your specific use case during quotation.
Wholesale, OEM & ODM
- Wholesale supply — volume pricing for distributors, installers, and project developers
- Capacity options — 100Ah / 200Ah / 280Ah wall-mount variants from the same product family
- BMS customization — current ratings, communication protocols, Bluetooth, and heating options
- Enclosure & branding — OEM logo, color, packaging, and documentation on request
- Project support — inverter pairing guidance, parallel system design, and wiring documentation
We are not limited to the SKUs listed on this site. If your project needs a different capacity, form factor, or communication protocol, describe the requirement — we coordinate tailored battery solutions through our manufacturing partners.
Frequently Asked Questions
Which inverters are compatible with this battery?
The BMS supports RS485 and CAN communication used by Growatt, Deye, Victron, SMA, GoodWe, and other mainstream hybrid inverters. Confirm your exact inverter model with us so we can pre-configure the correct protocol before shipment.
Can I expand the system later?
Yes. Up to 16 units can be paralleled for more than 160kWh of total storage. Add units of the same model; for best results, expand within a reasonable timeframe so all units age similarly.
Can I mix this 200Ah unit with the 51.2V 100Ah wall-mounted battery?
Parallel connection of different capacities is technically possible but not recommended for long-term balance. For mixed 5kWh/10kWh designs, we suggest separate strings or consulting us for a system layout.
Is installation complicated?
A wall-mount bracket is included. Mounting is straightforward, but all DC electrical connections should be performed by a certified installer in compliance with local regulations.
Does it work in cold climates?
Discharge operates down to -20°C. Charging below 0°C requires the optional low-temperature self-heating function — specify this when requesting a quote for cold-region projects.
What is the warranty?
Warranty terms depend on order volume, application, and operating conditions, and are confirmed in the formal quotation. Contact us with your project details for warranty terms.
Technical Resources
Related products and knowledge base:
- 51.2V 100Ah Wall-Mounted Battery (5.12kWh) — the smaller sibling in the same wall-mount family
- 48V 100Ah Rack-Mount Battery — cabinet-based alternative for equipment rooms
- 48V 200Ah Energy Storage Battery — higher-capacity floor-standing option
- Home Energy Storage Solutions — system-level guidance
- Contact LJY Energy — request a wholesale quote or project consultation