What is the minimum order quantity?

The Minimum Order Quantity (MOQ) is 1 piece.

How fast is the delivery?

We have huge stock and offer fast delivery within 2 days.

What certifications does the product have?

The product is CE and RoHS approved and holds United States Patents.

7s Active BMS System for 7s 14s 21s 28s 35s DIY 18650 Solar Batteries

Name: 7s Active BMS System for 7s 14s 21s 28s 35s DIY 18650 Solar Batteries
Brand: Changsha Deligreen Power Co., Ltd.
SKU: 766613312

Hunan, ChinaChangsha Deligreen Power Co., Ltd.

US$91.00

100 Pieces

Sample price:US$135.00/piece.Request sample

Product profile

Customization

Available

Type

Lithium Battery

Charger Type

Electric Charger

Model NO.

QNBBM 7S Battery balancer

Charger Application

EV, Solar, Storage System

Nominal Voltage

21V

Charger Style

Intelligent Charger

Compatible Battery Type

18650

Size

Qnbbm 7s Battery Balancer

Certification

RoHS, CE, United States Patents

Socket Type

EU/Au/Us

Products Name

7s Active BMS System for 7s 14s 21s 28s 35s DIY 18

Battery Type

Li Ion/Lead Acid/Lto/Supercapacitor

Brand

Qnbbm

Certificate

RoHS Ce

Logo

Customizable

MOQ

1PCS

Shipment

DHL/UPS/FedEx/E-Packet

Balance Current

Volatge Differences

1V-3A

Working Effciency

>94%

Voltage Difference

<10mv

Balance Method

Energy Transfer& Dynamic

Working Voltage

1.8V-5V

Battery Count Limited

Unlimited

Power Consumption

<50MW Per 1s

Transport Package

Bubble Bag/Outercarton

Specification

QNBBM 7S Battery balancer

Trademark

QNBBM

Origin

Shenzhen

HS Code

9032899090

Production Capacity

in Stock

Key features

High Balancing Current: Up to 6 Amps continuous balancing for efficient cell equalization.

Extended Battery Life: Increases lifespan by 2-3 times by preventing overcharge/discharge.

Wide Compatibility: Supports LiFePO4, Li-ion, LiMn2O4, NiMH, and Polymer batteries.

Precision Voltage Control: Keeps battery voltage difference within 10mV for optimal performance.

Low Power Consumption: Idle current draw is less than 50mW per cell for energy efficiency.

Fast Delivery: Huge stock available with fast delivery within 2 days.

Certified Quality: CE and RoHS approved with United States Patents for safety.

Customizable Logo: Logo can be customized for branding purposes.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceExperienced Team

Changsha Deligreen Power Co., Ltd.

Hunan, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Minor Customization CertifiedExport Year: 6 Years CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤9.52h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryChangsha Deligreen Power Co., Ltd. is a China-based trading company established in 2017, with 12 employees and a valid import/export license. It offers battery chargers, EV charging products, cables, and battery-monitoring products, and reports broad export-market coverage. The supplier states annual production of 10,000,000 active battery balancers and order fulfillment within 15 workdays in both peak and off-peak periods. However, it has no supplier-management-system certification, no new products launched in the past year, no ODM, major-brand OEM, or SDK capability, and only minor customization capability. Service governance is weakly documented: complaint handling and corrective/preventive-action procedures have no written procedures or records. It has an overseas warehouse but no overseas showroom, agents or branches, or offline trade-show participation. Customer feedback is self-reported as 99.5% positive, but no customer cases are provided.

CertificationsThe supplier’s certification of management systems is explicitly recorded as NIL. No management-system certification is evidenced in the provided information.

After-Sales capabilityThe supplier claims fast and reliable after-sales service and 99.5% positive customer feedback, and it has an overseas warehouse. However, it reports no written procedures or records for complaint handling or corrective and preventive actions, with no overseas agents or branches, so formal service capability is inadequately controlled.

R&D capabilityThe supplier reports two years of total R&D-engineer experience, but no new products were launched during the past year. It also states no R&D product-information progress, no ODM service, no major-brand OEM capability, and no available SDK, indicating limited documented innovation capability.

Production capacityThe supplier reports 10,000,000 pieces of annual active battery-balancer output, order fulfillment within 15 workdays in both peak and off-peak seasons, and six quality-control staff, while operating with 12 employees overall. These figures support stated production and delivery capacity, although its trading-company classification means manufacturing arrangements are not fully clarified.