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Rack 6U Battery Box Kits

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JKESS⚡ ENERGY

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6U Rack-Mount
DIY LiFePO₄ Battery Box

Unleash the power of 280Ah / 314Ah prismatic cells with the JKESS 6U rack-mounted enclosure. Active balancing, modular design, and global stock.

Explore Variants →Learn More

✅ 16S 51.2V✅ 280–314Ah✅ Active Balancer✅ 19" Rack

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Product Overview

Built for DIY Energy Freedom

The JKESS 6U rack-mounted enclosure is engineered for serious DIYers and installers who demand safety, flexibility, and performance.

🏗️

19" Rack Standard

Seamless integration with standard server racks. 6U height, optimized for 16S prismatic cells.

⚡

Active Balancing

JK BMS with 2A active balancer extends cycle life by equalizing cell voltages in real time.

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DIY Customization

Choose BMS, screen, CCS harness, casters, and more. Build exactly what you need.

⚠️ IMPORTANT: Battery cells are NOT included.

This is a complete enclosure kit — you supply the 280Ah / 314Ah LiFePO₄ prismatic cells.

Choose Your Build

Six Variants for Every Need

From a basic screen version to a fully loaded PRO with active balancing, CCS harness, and heavy‑duty casters.

4.3″ ScreenBase

JKLU010D · 16S

Entry-level version with a 4.3‑inch LCD display for real‑time voltage, current, and temperature monitoring. No BMS included — pair with your preferred protection board. Perfect for budget‑conscious DIYers who want visibility without extra features.

4.3″ LCDRS485200A Breaker

V19 New ScreenUpgrade

JKLU020D · 16S

Upgraded with the latest V19 display featuring enhanced UI, faster refresh, and clearer data visualization. Still no BMS — ideal for users who want a premium screen experience while using their own BMS. The V19 screen offers improved contrast and sunlight readability.

V19 Display4.3″ TTL200A Breaker

⚡ PRO VersionBMS Included

JKLU010D-PRO · 16S

The complete package: JK‑PB2A16S20P BMS with 200A continuous current and 2A active balancing. Includes the V19 screen and all hardware. Active balancing eliminates voltage drift between cells, dramatically extending battery pack lifespan. The smart BMS also provides over‑current, over‑voltage, and temperature protection.

2A Active Balancer200A BMSV19 ScreenRS485/CAN

🔌 CCS VersionHarness

JKLU020D-CCS · 16S

Everything in the PRO version plus a pre‑assembled CCS (Cell Contact System) harness and custom copper busbars. The CCS harness simplifies assembly, reduces wiring errors, and ensures consistent contact pressure. Perfect for high‑volume builders or those who want a professional, factory‑like installation.

CCS HarnessCustom Busbars2A BalancerV19 Screen

🔄 Roller VersionMobile

JKLUR015 · 16S

Mobility meets power. This version adds four GF‑60 heavy‑duty industrial casters (400kg load capacity) to the base enclosure. Perfect for workshops, temporary installations, or setups that require repositioning. Includes the V19 screen but no BMS — choose your own protection board.

GF‑60 Casters400kg LoadV19 Screen200A Breaker

🏆 Roller PROUltimate

JKLUR015D · 16S

The ultimate mobile power station. Combines GF‑60 heavy‑duty casters, JK‑PB2A16S20P BMS with 2A active balancing, and the V19 high‑definition screen. This is the flagship kit: roll it anywhere, monitor everything, and enjoy the peace of mind that comes with active cell balancing. Ideal for off‑grid, RV, and mobile backup applications.

2A BalancerGF‑60 CastersV19 Screen200A BMS400kg Load

📊 Side‑by‑Side Comparison

Quickly compare features across all six variants.

Variant	Screen	BMS	Active Bal.	CCS	Casters	Model
4.3″ Screen	4.3″ LCD	—	✕	✕	✕	JKLU010D
V19 New Screen	V19 4.3″	—	✕	✕	✕	JKLU020D
⚡ PRO	V19 4.3″	JK‑PB2A16S20P	✅ 2A	✕	✕	JKLU010D-PRO
🔌 CCS	V19 4.3″	JK‑PB2A16S20P	✅ 2A	✅	✕	JKLU020D-CCS
🔄 Roller	V19 4.3″	—	✕	✕	✅ GF‑60	JKLUR015
🏆 Roller PRO	V19 4.3″	JK‑PB2A16S20P	✅ 2A	✕	✅ GF‑60	JKLUR015D

Customize Your Build

DIY Accessories & Customization

Mix and match components to create the perfect battery system. All accessories are engineered for seamless integration.

🧠

JK BMS

Active balancing 2A, 200A continuous. Extends pack life by equalizing cells in real time. RS485/CAN.

JK‑PB2A16S20P

🔌

CCS Harness

Cell Contact System with pre‑terminated wires and custom copper busbars. Reduces assembly time and errors.

16S · 280/314Ah

🌡️

Heating Pad

Low‑temperature protection for cold climates. Maintains optimal cell temperature during charging.

12V / 24V

⚙️

Breaker & Terminal

DCB‑1P200A breaker + T‑200A terminal. Over‑current protection and secure high‑current connections.

200A / 250A

🔹 100% OEM / ODM — Customize branding, colors, and accessory bundles. Contact us for bulk orders.

Use Cases

Where the 6U Rack Shines

Versatile enough for residential, commercial, and mobile energy storage.

🏠

Home Energy

Store solar energy for overnight use. Reduce grid dependence with a 15‑16kWh 51.2V pack.

☀️

Off‑Grid Solar

Remote cabins, farms, and telecom sites. Reliable power where the grid doesn't reach.

🏢

Data Center Backup

Rack‑mount form factor fits standard server racks. UPS and peak‑shaving applications.

🚐

RV & Mobile

Caster versions make it easy to move. Power your adventures with silent, clean energy.

Why JKESS

Built for Safety & Longevity

⚖️

Active Balancing — The Game Changer

The problem: In any series‑connected battery pack, cell voltage drift is inevitable. Over time, the weakest cell limits the entire pack's capacity, leading to premature failure.

The JKESS solution: Our JK‑PB2A16S20P BMS features 2A active balancing — it transfers energy from higher‑voltage cells to lower‑voltage cells in real time. This keeps all cells perfectly equalized, maximizing usable capacity and extending cycle life by up to 40%.

📈 Result: More cycles, more kWh, lower total cost of ownership.

🛡️

Safety & Structural Integrity

The 6U enclosure is fabricated from high‑grade steel with a powder‑coated finish for corrosion resistance. The design incorporates a pre‑load compression system that applies 300kgf of pressure to the cell stack — a critical feature for prismatic LiFePO₄ cells to prevent swelling and maintain electrical contact.

Ventilation channels and thermal management keep operating temperatures within safe limits. The enclosure meets rigorous industrial standards for vibration and shock resistance.

300kgf Pre‑loadPowder‑coated SteelThermal Vents19″ Rack

Market Trend

51.2V · 280Ah — The Global Standard

The 16S 280Ah / 314Ah LiFePO₄ configuration has emerged as the most popular residential energy storage format worldwide. According to industry data, over 60% of new home battery installations in 2025–2026 use this voltage and capacity tier.

60%+

Market Share (Residential)

15‑16

kWh per Pack

280‑314

Ah Capacity Options

Source: Global Energy Storage Market Report 2026 · LFP adoption continues to accelerate due to falling cell prices.

Why Choose JKESS

Global Reach, Local Support

🏭

EU & US Warehouses

Inventory in Europe and the United States. Fast local shipping — no long ocean waits.

🚚

DDP / Tax‑Free Shipping

Delivered Duty Paid to most countries. No hidden customs fees or surprises at delivery.

✅

CE · FCC · RoHS

All products fully certified. Meets international safety and environmental standards.

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OEM / ODM Support

100% customization — branding, colors, accessory bundles. Your project, your specs.

Help Center

Frequently Asked Questions

Everything you need to know about the 6U Rack Battery Kit.

01. Does this kit include battery cells?+

No. The JKESS 6U Rack Battery Box is an enclosure kit only. It does not include LiFePO₄ prismatic cells. You will need to purchase 16 cells of 280Ah, 304Ah, or 314Ah capacity separately. We recommend using reputable brands such as EVE, CATL, or REPT. The enclosure is designed specifically for the standard 3.2V prismatic form factor (L173*W72*H207mm approximately). Always use matched cells from the same batch for optimal performance.

02. What type of cells are compatible?+

The enclosure supports 16S (16 cells in series) configuration of standard prismatic LiFePO₄ cells. Compatible capacities: 280Ah, 304Ah, and 314Ah. The physical footprint must match the standard L173*W72*H207mm size (with some variation for terminal height). The pre‑load compression system is adjustable to accommodate minor thickness differences. Always verify cell dimensions before ordering.

03. What is active balancing and why does it matter?+

Active balancing is a BMS feature that transfers energy from higher‑voltage cells to lower‑voltage cells during charging and discharging. Unlike passive balancing (which burns excess energy as heat), active balancing preserves energy and works continuously. The JK‑PB2A16S20P BMS provides 2A active balancing per cell, ensuring all cells remain within 5mV of each other. This prevents "runner" cells from triggering over‑voltage protection and extends overall pack life by up to 40% by maximizing usable capacity.

04. What are the shipping times and warehousing options?+

JKESS maintains strategic warehouses in the EU (Germany) and the USA (California). For customers in these regions, standard delivery takes 3–7 business days. For other regions, we ship via DHL/FedEx priority with typical transit times of 5–12 business days. All shipments are DDP (Delivered Duty Paid) — import duties and taxes are prepaid, so you won't face unexpected charges at delivery. Tracking numbers are provided within 24 hours of dispatch.

05. Is the BMS compatible with other brands?+

The enclosure is designed to be BMS‑agnostic. You can install any BMS that supports 16S LiFePO₄ configuration, provided it fits physically. However, for the best performance and integration, we highly recommend using the JK‑PB2A16S20P BMS (available in PRO and CCS variants). This BMS is pre‑configured for the 6U enclosure, with mounting holes and wiring channels already aligned. If you use a third‑party BMS, you may need to adapt mounting and wiring — we provide CAD drawings to assist.

06. How difficult is the installation process?+

Installation is DIY‑friendly and typically takes 2–3 hours for an experienced builder. The kit includes a detailed manual with step‑by‑step instructions. You'll need basic tools: a torque wrench (4–6 Nm), hex keys, and a multimeter. The PRO and CCS variants come with pre‑wired BMS and harnesses, which significantly reduce assembly time. We also provide video tutorials on our support portal. If you're unsure, we recommend consulting a professional installer — but many DIYers successfully build their packs with our kit.

07. What is the warranty policy?+

All JKESS enclosure kits come with a 3‑year limited warranty against manufacturing defects in materials and workmanship. The BMS (where included) carries a separate 2‑year warranty. The warranty covers the enclosure, hardware, and BMS; it does not cover battery cells (which are supplied by the customer) or damage caused by improper installation, misuse, or environmental factors. We stand behind our products and offer responsive technical support via email at [email protected].

08. What are the wiring and connection considerations?+

The 6U enclosure uses 4# pure copper silicone wire for main power connections, rated for 200A continuous current. The breaker (DCB‑1P200A) and terminal blocks (T‑200A or INV‑250A) are pre‑installed. For the CCS version, custom copper busbars are included for cell‑to‑cell connections. Important: Always use the provided torque specs (4–6 Nm) when tightening connections. Loose connections cause resistance and heat. Use a properly sized cable lug crimper for the main power leads. We recommend using a 70mm² or 2/0 AWG cable for the battery‑to‑inverter connection.

09. What is the CCS harness and why is it useful?+

CCS (Cell Contact System) is a pre‑assembled wiring harness that connects all cell voltage sense wires and temperature sensors to the BMS in a single, organized bundle. It eliminates the tedious and error‑prone task of individually wiring each cell. The CCS version includes custom copper busbars for series connections, plus the harness with labeled connectors. This reduces assembly time by 50%, minimizes wiring mistakes, and ensures consistent contact pressure. It's especially valuable for installers who build multiple packs or for users who want a clean, professional installation.

10. How can I contact support or place a custom order?+

For all inquiries — sales, technical support, custom OEM/ODM requests, or bulk orders — please email us at [email protected]. Our team responds within 24 business hours. We support 100% customization: we can brand the enclosure with your logo, adjust colors, and tailor accessory bundles. For urgent technical issues, we offer remote support sessions. Visit our website www.jkess.com for more resources, manuals, and firmware updates.

Industry Insights

Energy Storage News & Trends

Stay informed with the latest developments in LiFePO₄ and energy storage.

📉

LFP Cell Prices Drop 15% in Q1 2026

Falling raw material costs make 280Ah packs more affordable than ever.

🏡

Residential Storage to Grow 28% in 2026

Solar + storage adoption accelerates as grid prices rise globally.

⚡

Active Balancing: The New BMS Standard

Why 2A active balancers are becoming essential for long‑life packs.

🇪🇺

EU Boosts Home Storage Incentives

New subsidies make residential battery systems more accessible.

🔬

LiFePO₄ vs NMC: Safety & Cycle Life

Why LFP remains the top choice for stationary storage.

Ready to Build Your Battery Pack?

Contact our sales team for pricing, customization, or technical consultation. We're here to help.

✉️ Email: [email protected] Visit jkess.com →

All inquiries replied within 24 hours · OEM/ODM welcomed

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