- High Capacity, Compact Footprint: 51.2V × 314Ah = 16.08 kWh in a single battery module — 57% more energy than the 51.2V 200Ah / 10kWh model without changing inverter requirements.
- 8,000+ Cycle Life: Tested at 0.5C with 80% DOD at 25°C, equivalent to 16+ years of daily solar use.
- Universal Inverter Compatibility: RS485 / CAN bus protocol — works with Sunnysky, Victron, Deye, Growatt, MUST, SMA, Studer, and most 48V hybrid inverters.
- Parallel Up to 16 Units: Scale from 16 kWh to 256 kWh with automatic BMS balancing — same battery, every project size.
- Built for Hot Climates: Discharge from -10°C to 55°C, charge from 0°C to 55°C — proven in tropical Africa and Mediterranean Europe.
- Certified & Warrantied: CE, IEC 62109, UN38.3, MSDS, RoHS. 5-year manufacturer warranty with direct factory support.
Battery Parameters
| Parameter | Value |
|---|---|
| Chemistry | Lithium Iron Phosphate (LiFePO4 / LFP) |
| Cell Configuration | 16S1P (16 prismatic cells in series) |
| Nominal Voltage | 51.2 V |
| Nominal Capacity | 314 Ah |
| Nominal Energy | 16.08 kWh |
| End-of-Charge Voltage | 57.6 V |
| End-of-Discharge Voltage | 40.0 V |
| Standard Charge Current | 157 A (0.5C) |
| Maximum Charge Current | 314 A (1.0C) |
| Standard Discharge Current | 157 A (0.5C) |
| Maximum Discharge Current | 314 A (1.0C) |
| Peak Discharge Current | 600 A (≤30 s, 1.9C) |
| Cycle Life | ≥8,000 cycles @ 0.5C, 80% DOD, 25°C |
| Round-Trip Efficiency | ≥95% |
| Communication | RS485 / CAN |
| BMS Functions | Overcharge, over-discharge, over-current, short circuit, over-temperature, cell balancing, SOC/SOH |
Mechanical
| Parameter | Value |
|---|---|
| Form Factor | Rack-mounted / Wall-mounted / Floor-standing (customizable) |
| Dimensions (L × W × H) | 665*365*997mm |
| Weight | 136KG |
| Housing Material | SPCC steel, powder-coated |
| Color | White (standard) / Custom RAL on request |
| IP Rating | IP21 (indoor) / IP65 (outdoor optional) |
Environmental
| Parameter | Range |
|---|---|
| Charge Temperature | 0°C to 55°C |
| Discharge Temperature | -10°C to 55°C |
| Storage Temperature | -20°C to 45°C |
| Operating Humidity | 5% to 95% RH, non-condensing |
| Altitude | ≤2,000 m (above sea level) |
Certifications
| Certification | Status |
|---|---|
| CE | ✓ Certified |
| IEC 62109 | ✓ Certified |
| UN38.3 (Transport) | ✓ Certified |
| MSDS | ✓ Provided |
| RoHS | ✓ Certified |
| UL1973 | Optional (on request) |
| KC (Korea) | Optional (on request) |
Warranty
| Period | Coverage |
|---|---|
| 5 years from delivery date | Manufacturing defects, capacity below 80% of nominal under normal use |
| Direct factory technical support | English / French / Chinese |
The Sunnysky 51.2V 314Ah LiFePO4 Battery is built for buyers who need dependable stored power without the day-to-day headaches that come with aging lead-acid packs or mismatched battery banks. In a solar installation, backup room, or energy storage cabinet, the core problem is simple: you want stable energy on demand, easy integration with an inverter, and a battery platform that can support regular cycling without constant attention. This model is designed to answer that need with a high-capacity lithium iron phosphate structure and a cabinet-style form that suits organized power systems.
Product overview
With a nominal 51.2V platform and 314Ah capacity, this battery sits in the class often described as a 16kWh LiFePO4 battery. Based on the stated voltage and amp-hour rating, the energy content is approximately 16.08kWh, which makes it a practical fit for applications that need a meaningful reserve rather than a small buffer. For buyers comparing systems, that places it in the range of a serious 16kWh battery pack intended for daily charging and discharging in residential or light commercial use.
The image information suggests a floor-standing, cabinet-style enclosure with a front display and a simple ON/OFF control interface. That kind of presentation is useful in a power room because it keeps the installation neat, easy to read, and easier to service than loose components spread across a shelf.
What the specification means in practice
A 51.2V lithium iron phosphate battery is widely chosen for solar and backup systems because the chemistry is known for good thermal stability and a steady discharge profile. The 314Ah LiFePO4 battery format also gives the system enough depth to support longer runtime windows, reducing how often the generator or grid has to step in. For customers building a 51.2V solar battery setup, the result is smoother energy handling and less operational stress.
Key capabilities and visible design features
The visible product form points to a compact cabinet that stands on caster wheels, which is useful when the battery package must be moved during installation or maintenance. A black recessed display area and a physical power button indicate an integrated control and monitoring layer. In a real working environment, that kind of interface helps operators check status quickly instead of digging through external meters or disconnected indicators.
As a home energy storage battery, this type of system is typically valued for its ability to sit quietly in the background while supporting lighting, communication equipment, appliances, and inverter-fed circuits. In commercial settings, the same hardware can help buffer short outages or support time-shifting strategies when paired with solar charging.
Materials and enclosure considerations
The visible enclosure appears to use a painted or powder-coated metal shell, likely chosen for rigidity and a clean, easy-to-maintain surface. The white matte-to-satin finish gives it a restrained industrial look rather than a bulky utility-box appearance. Around the control area, darker glossy plastic creates contrast and makes the screen easier to read. This combination is common in cabinet-style electrical equipment because it balances durability, service access, and visual clarity.
For buyers, enclosure quality matters as much as battery chemistry. A well-built housing protects internal modules, supports orderly cable routing, and makes the unit suitable for indoor technical spaces where appearance and safety both matter.
Manufacturing and system integration
At a manufacturing level, a battery like this usually involves cell grouping, module assembly, busbar installation, BMS integration, enclosure fabrication, and final electrical testing. Sunnysky, under Guangzhou Tianyuan Solar Equipment CO.,LTD, emphasizes independent R&D and patented technologies, which suggests an in-house approach to product development and system refinement. That matters in an energy product because the battery is only one part of the solution; the control logic, monitoring interface, and enclosure design all influence real-world usability.
When paired with a hybrid inverter battery setup, a unit in this class should be reviewed for communication compatibility, operating voltage window, and charging strategy. Buyers should also confirm whether the inverter can read the battery’s BMS data or will run in a more basic voltage-based mode.
Application scenarios
The Sunnysky 51.2V 314Ah LiFePO4 Battery can be considered for residential backup, small business energy support, solar self-consumption projects, and other low- to medium-scale storage installations. It is particularly relevant where a 51.2V solar battery is preferred for straightforward inverter matching. In off-grid or hybrid environments, a unit like this can help stabilize daily loads and reduce dependence on short-term grid fluctuations.
For installers, the cabinet-style format is convenient in utility rooms, equipment corners, and other locations where a freestanding battery system is easier to place than a wall-mounted arrangement. The visible mobile base can also simplify repositioning during setup.
Quality control and buyer decision factors
When evaluating a 16kWh LiFePO4 battery, buyers should ask about cell matching, BMS protection functions, communication protocol support, enclosure finish, and factory testing procedures. It is also wise to confirm the expected inverter pairing, required installation space, and maintenance access. Since the image does not reveal internal structure, exact capacity tolerances, certifications, or cycle-life figures should be confirmed directly with the supplier rather than assumed.
Guangzhou Tianyuan Solar Equipment CO.,LTD states that it serves customers in more than 50 countries and invites global clients to visit the factory near Guangzhou Baiyun International Airport. That kind of accessibility can be helpful for technical buyers who want to inspect production methods, discuss customization, and review packaging or integration needs in person.
Customization and next steps
For projects that need a different cabinet layout, display arrangement, communication method, or system interface, it is best to discuss customization early. The right configuration depends on inverter type, installation environment, and the operating pattern of the site. If you are comparing a 16kWh battery pack against other storage options, focus on how the battery will actually be used: daily cycling, backup-only service, or combined solar storage and emergency support.
For technical drawings, integration questions, or factory discussion, contact Sunnysky to review the battery configuration that fits your project. A well-matched 51.2V lithium iron phosphate battery does more than store power; it keeps the whole system calmer, cleaner, and easier to manage.
