JKESS energy storage engineering and manufacturing
New: JK-B2A24S20P Smart BMS with Active Balancing

Reliable BMS & Energy Storage Solutions

Professional smart battery management systems, DIY energy storage kits and premium accessories. Engineered for performance, trusted by installers and makers worldwide.

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50K+

BMS Units Shipped

40+

Countries Served

CE / RoHS

Certified Compliant

24/7

Technical Support

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Everything you need to build and manage your lithium battery energy storage system.

Smart BMS

4S-24S, 60A-200A with Bluetooth & active balancing

Storage Kits

Complete DIY battery packs with cells, BMS & enclosure

Displays & Modules

OLED monitors, Bluetooth adapters & accessories

Battery Parts

Busbars, connectors, wiring harnesses & tools

Featured Products

Our most popular BMS and energy storage components, trusted by thousands of customers.

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Application Solutions

From residential backup to off-grid independence, JKESS powers your energy journey.

JKESS home energy storage solution

Home Energy Storage

Reduce electricity bills and gain backup power with reliable residential battery systems.

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JKESS off-grid energy storage solution

Off-Grid & DIY Builds

Build your own battery bank with our BMS, kits and technical documentation.

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Why Choose JKESS

We combine factory-direct pricing with engineering-grade quality and dedicated support.

Quality Assured

Every unit undergoes rigorous testing before shipment. CE, RoHS and EU compliant.

Poland Warehouse

Selected SKUs ship locally across the EU through DHL, UPS or GLS.

Expert Support

Dedicated technical team for firmware, wiring and troubleshooting guidance.

Factory Direct

Cut out the middleman. Competitive pricing with OEM/ODM customization available.

Poland warehouse now open

Fast EU local delivery,
without the import wait

Selected BMS and accessory products are stocked at our Poland warehouse. Eligible EU orders can arrive in an estimated 2–5 business days through DHL, UPS or GLS, with no import customs clearance for intra-EU delivery.

2–5Business days
DHL / UPS / GLSCarrier network
EU localFulfilment
View Poland stock

Certified & Compliant

All products meet international safety and environmental standards.

CE
CE Certified
RoHS
RoHS Compliant
FCC
FCC Approved
ISO
ISO 9001

Looking for Bulk Pricing?

We offer competitive wholesale rates for installers, distributors and OEM partners. Get a customized quote within 24 hours.

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Shop All Products

Browse our complete range of smart BMS, energy storage kits and battery accessories.

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Wholesale & OEM Inquiry

Partner with JKESS for bulk pricing, custom branding and dedicated supply.

Why Partner With Us

As a direct manufacturer, we offer installers, distributors and OEM partners unmatched pricing, quality control and customization flexibility.

  • Poland Warehouse Fulfilment

    Selected SKUs ship locally across the EU, helping reduce lead times and shipping costs.

  • Factory-Direct Pricing

    Up to 40% off retail for qualified bulk orders. No middleman markup.

  • OEM / ODM Services

    Custom branding, firmware, packaging and specifications to match your brand.

  • Reliable Supply Chain

    Stable inventory, priority production slots and scheduled recurring shipments.

  • Dedicated Account Manager

    Personal support from quote to delivery, with technical guidance included.

Prefer to talk directly?

Reach our wholesale team through any of these channels:

Rosie@jkess.com
+86 158 9007 3068 (WhatsApp)
Shenzhen, Guangdong, China

Request a Quote

Fill in the form below and our team will respond within 24 hours.

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Thank you for your interest. Our wholesale team will review your request and respond within 24 hours.

Home/Solutions

Application Solutions

Discover how JKESS products power energy storage across different use cases.

Home Energy Storage

Home Energy Storage

Residential backup and solar self-consumption systems.

Off-Grid

Off-Grid & Remote Power

Cabins, RVs, boats and remote site power solutions.

Residential Backup

Keep essential loads running during outages with reliable lithium battery banks.

Solar Self-Consumption

Store excess solar generation and use it when rates are highest.

Commercial & C&I

Peak shaving and demand charge management for small businesses.

RV & Marine

Compact, lightweight battery systems for mobile applications.

Home/Support

Technical Support

Documentation, firmware downloads and troubleshooting resources for JKESS products.

Product Manuals

Download detailed user manuals, wiring diagrams and specification sheets.

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Firmware Updates

Latest firmware for JK BMS models with changelogs and update guides.

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FAQ & Troubleshooting

Answers to common questions and step-by-step troubleshooting guides.

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Latest Downloads

JK-B2A24S20P User Manual

PDF · 3.2 MB · Updated Sep 2026

Download

JK BMS Firmware v11.26

BIN · 1.8 MB · Latest Stable

Download

Wiring Diagram Collection

ZIP · 5.6 MB · All BMS Models

Download

EU Compliance Declaration

PDF · 890 KB · CE / RoHS

Download
Home/Certifications

Certifications & Compliance

JKESS products meet international safety, EMC and environmental standards. Download official documents below.

CE Certification

Declaration of Conformity for EMC and Low Voltage directives, valid for EU market.

RoHS Compliant

Restriction of Hazardous Substances directive 2011/65/EU compliance verified.

FCC Approved

FCC Part 15B certification for electromagnetic compatibility in the US market.

ISO 9001:2015

Quality management system certified by accredited third-party auditor.

UN 38.3 Test

Battery transport safety testing for air and sea freight compliance.

EU 2023/1542

Compliance with the new EU Battery Regulation for sustainability and labeling.

Home/About Us

About JKESS ENERGY

Engineered in Shenzhen, trusted worldwide. Your partner in smart energy storage.

Building the Future of Energy Storage

JKESS ENERGY is a Shenzhen-based technology company specializing in smart Battery Management Systems (BMS) and DIY energy storage solutions. Founded by engineers with deep expertise in lithium battery technology, we design and manufacture products that balance performance, safety and affordability.

Our mission is to make reliable energy storage accessible to everyone — from DIY enthusiasts building their first battery pack to professional installers deploying large-scale systems. Every JKESS product is engineered with attention to detail and tested to meet international standards.

With a growing global customer base across Europe, North America and Oceania, we continue to innovate in active balancing technology, firmware development and complete storage system design.

JKESS engineering and manufacturing

8+

Years in Industry

50K+

Units Shipped

40+

Countries Served

200+

Global Partners

Our Values

The principles that guide every product and every customer interaction.

01

Engineering First

We are engineers at heart. Every design decision is rooted in technical merit, not marketing. Our products are built to perform in real-world conditions.

02

Radical Transparency

Clear specifications, honest pricing and open documentation. We publish firmware changelogs, wiring diagrams and test results because our customers deserve to know exactly what they are buying.

03

Customer Success

Your project is our project. From pre-purchase consultation to post-installation troubleshooting, our technical team is invested in helping you succeed.

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Contact Us

Have a question? We are here to help. Reach out through any channel below.

Get in Touch

Our team typically responds within 12-24 hours. For wholesale inquiries, please use the dedicated wholesale form for faster processing.

Email

Rosie@jkess.com

Sales & project inquiries

WhatsApp

+86 158 9007 3068

Mon-Sat, 9:00-18:00 (UTC+8)

Address

Shenzhen, Guangdong Province, China

Bao'an District, Technology Park

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We will get back to you as soon as possible.

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