Shenzhen First Tech Co., Ltd.
| 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 | 15kWh |
| 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 |
| Brand Name | 1stess |
| Model Number | RPES-WM2 (51.2V 300Ah) |
| Certification | CE, IEC |
| Place of Origin | China |
View Detail Information
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Product Specification
| 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 | 15kWh |
| 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 |
| Brand Name | 1stess | Model Number | RPES-WM2 (51.2V 300Ah) |
| Certification | CE, IEC | Place of Origin | China |
| High Light | 48V 15kWh wall mounted battery ，Lifepo4 home energy storage ，314Ah lithium battery pack with BMS | ||
Shenzhen First Tech Co., Ltd was established in 2017, which is a one-stop solution provider of solar & battery energy storage system.
First Tech is engaged in the research, development, production, sales and service of the commercial and industrial energy storage system, home energy storage system, lithium-ion battery pack, solar hybrid inverter. solar optimizer etc.
First Tech is located in Shenzhen City, Guangdong Province, China, the factory have passed lS09001,1S014001,1S045001 managementsystem certification and the products have obtained TUV-CB, CEIEC,EMC MSDS, UN38.3, etc certificates. The products are exported toclients in such countries and regions as Europe, Africa, Middle East,North America,South America, Southeast Asia, etc.
Except providing it's own standard products, First Tech also welcome OEM & ODM orders, and will provide professional service and quality products with competitive prices to customers and market.
First Tech is committed to becoming a global leading solar & ESS solution provider to provide green energy and contribute to cleanerworld.
Enjoy New Life, Starting with First Tech!
Common Questions Regarding the Applicability of Battery Packs in Different Countries/Regions
Context: High solar adoption, demand for residential and SME backup, and hot climate.
Q1 – Reporter: Khun Chatchai Somsak, Bangkok Post
“How does the battery perform in Thailand’s hot season when temperatures exceed 40°C?”
A: It can discharge up to 65°C. Between 40–50°C, derating may occur, but the BMS will manage temperature to ensure safety and longevity.
Q2 – Reporter: Khun Anongnat P., The Nation
“Can it be used for a small restaurant or shop to reduce peak demand charges?”
A: Absolutely. When paired with a suitable inverter, it can discharge during peak hours to shave grid demand, lowering electricity bills significantly.
Q3 – Reporter: Khun Sirinapa W., Thai Rath
“Is there a Thai-language app for monitoring?”
A: Our monitoring platform supports multiple languages, including Thai, for easy access to system data, history, and alerts.
Q4 – Reporter: Mr. Thomas Beagle, The Phuket News
“For villa resorts with multiple villas, can one large battery bank serve several units?”
A: With parallel capability up to 16 units, you can create a central storage system to support multiple villas or facilities within a resort.
Q5 – Reporter: Ms. Panida S., Matichon
“What maintenance is required?”
A: It’s essentially maintenance-free. Regular visual inspection and ensuring ventilation are recommended. The BMS handles cell balancing automatically.
Context: Rapid growth in rooftop solar, high electricity costs for SMEs, and frequent power fluctuations.
Q1 – Reporter: Ms. Nguyen Thi Hoa, VnExpress
“Can this battery help a small factory avoid production downtime during grid fluctuations?”
A: Yes. Its response time is instantaneous when paired with an inverter. It can provide seamless backup during grid dips or outages, keeping production running.
Q2 – Reporter: Mr. Tran Van Duc, Tuoi Tre
“What is the recommended charge current for fastest charging without harming the battery?”
A: The recommended charge current is <150A, which allows a full charge in about 2–3 hours from empty, depending on solar or grid input.
Q3 – Reporter: Ms. Le Mai Lan, Vietnam News
“Is it safe to install near living areas given lithium battery concerns?”
A: LiFePO4 is the safest lithium chemistry. It does not combust under misuse. The battery enclosure is robust and includes protection against short circuit and overcurrent.
Q4 – Reporter: Mr. Pham Quang Huy, Thanh Nien
“Can it be charged from both solar and grid simultaneously?”
A: That functionality depends on the inverter. The battery itself accepts charge from any DC source within its voltage and current limits.
Q5 – Reporter: Ms. Hoang Thi Minh, Sai Gon Giai Phong
“How does the warranty handle capacity degradation?”
A: The warranty guarantees that the battery will retain a certain percentage of its original capacity over the warranty period, subject to cycle count and usage conditions.
Company Details
Year Established:
2017
Total Annual:
15000000-16000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
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