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Brand Name : 1stess
Model Number : RPES-WM2 (51.2V 300Ah)
Certification : CE, IEC
Place of Origin : China
MOQ : 1 piece
Price : USD 1255 one piece
Payment Terms : L/C,T/T
Supply Ability : 2000 pieces per month
Delivery Time : 15 days
Packaging Details : carton box
Safety Features : Overcharge Protection, Overdischarge Protection, Short Circuit Protection
Capacity : 16kWh
Chemistry : Lithium Ion
Certifications : CE, UL, IEC
Cycle Life : >5000 Cycles
Warranty : 5-10 Years
size : 740*395*250mm
Operating Temperature : -20°C To 55°C

| Model | WYLD51.2V314AH |
|---|---|
| Rated Voltage | 51.2V |
| Rated Capacity | 314Ah |
| Rated Energy | 16.076kWh |
| Cycle life | ≥5000 |
| Maximum charging voltage | 57.4V |
| Minimum discharge voltage | 43.2V |
| Standard charging current | 150A |
| Standard discharge current | 150A |
| Dimension L*W*H (mm) | 740*395*250mm |
| Weight (kg) | 115kg |

Shenzhen First Tech Co., Ltd was established in 2017 as a one-stop solution provider of solar & battery energy storage systems. We specialize in research, development, production, sales and service of commercial and industrial energy storage systems, home energy storage systems, lithium-ion battery packs, solar hybrid inverters, and solar optimizers.
Located in Shenzhen City, Guangdong Province, China, our factory has passed ISO9001, ISO14001, and ISO45001 management system certifications. Our products have obtained TUV-CB, CEIEC, EMC MSDS, UN38.3, and other certificates. We export to Europe, Africa, Middle East, North America, South America, and Southeast Asia.
In addition to standard products, we welcome OEM & ODM orders, providing professional service and quality products at competitive prices. First Tech is committed to becoming a global leading solar & ESS solution provider to deliver green energy and contribute to a cleaner world.
Enjoy New Life, Starting with First Tech!

Key Concerns & Answers by Country:
| Country | Primary Concerns & Applications | Key Answers from Product Features |
|---|---|---|
| Singapore | BMS Integration, Safety in Dense Urban Areas, Cybersecurity, Efficiency vs. 48V, Degradation in Warm Climate. | Open RS485/CAN protocols, IEC62619/CE certs, Secure encrypted updates, 51.2V for higher efficiency, Smart BMS for longevity. |
| Malaysia | Reaction time to grid dips, Outdoor installation viability, Solar self-consumption logic, System expansion, Remote support for clinics. | <20ms transition, Needs protective enclosure, Compatible with hybrid inverters for solar-first logic, Modular parallel up to 16 units, Cloud-based remote monitoring. |
| Thailand | Resort peak shaving, Generator charging efficiency, Cold storage compatibility, Local warranty, Data for sustainability reports. | Programmable discharge for demand charge reduction, High round-trip efficiency, Can discharge to -20°C but charge >0°C, Local partner network, Exportable energy/CO2 reports. |
| Philippines | Seismic mounting, Community resilience hubs, Salt spray corrosion, 3-Phase grid compatibility, High-temp derating impact. | Seismic restraint guidelines, Scalable for microgrids, Conformal coating on PCBs, Works with 3-phase inverters, Derating protects long-term health. |
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Scalable to 160KWh All in One Wall Mounted 51.2V 314Ah Lifepo4 Lithium Battery Pack 16KWh Home Energy Storage Images |