Customer Service 008618100274609





Local delivery: 3–7 days
International express or air freight: 10–12 days
Sea freight: 25–35 days
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Dear Valued Customer,
Thank you for choosing WISTEK. We know that safety and reliability are paramount when it comes to battery cells, which is why we are committed to delivering top-tier products backed by exceptional customer service. This guarantee outlines our commitment to quality, ensuring a seamless and worry-free experience.
Engineered for high-performance DIY builds, the Wistek Tower Series features the integrated JK PB2A16S20P BMS, delivering a robust 200A continuous charge/discharge capacity and 2A active balancing for peak cell health. Designed with flexible busbars to minimize thermal buildup and a triple-redundant safety suite—including a T-type fuse, circuit breaker, and smart BMS protection—this unit provides professional-grade reliability and seamless Bluetooth monitoring for your home energy storage.
The Tower 15kWh DIY box is designed to accommodate 16 battery cells. It is compatible with a wide range of cell models, including
Battery Cell Dimensions (W × T × H): 173 × 72 × 207 mm.
Constructed from 1.5mm-thick stainless steel. Finished in white, the enclosure features rounded corners with a rolled-edge design, making it child-friendly.
Equipped with a built-in JK V19 PB2A16S20P Battery Management System (BMS). This system enables the finished battery pack to deliver a continuous discharge rate of 200A, features a 2A active balancing current, and supports wireless monitoring via Bluetooth connectivity.

All high-current connections utilize flexible busbars. This design allows the system to effortlessly handle high current loads without causing significant heat buildup within the battery pack.
Features a 250A T-type fuse capable of promptly and completely interrupting abnormal current flows.
Includes a 250A circuit breaker, providing an additional layer of safety protection and ensuring ample safety redundancy.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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