12V 280Ah/306Ah/314Ah DIY Battery Box for RV ESS

12V DIY Battery Box Kit for 280Ah-314Ah Prismatic Cells (with JK Smart BMS)

Build your high-capacity LiFePO4 battery system with professional ease. This 12V DIY Battery Enclosure is the ultimate solution for housing 4 prismatic cells, featuring an integrated smart management system and multiple output ports for camping, marine, or off-grid power.

Universal Compatibility for Prismatic Cells

This heavy-duty stainless steel box is precision-sized (Internal: 173x72x204mm per cell) to accommodate 4 pieces of the most popular Grade A cells, including:

• EVE: 280Ah, 304Ah, 306Ah, 314Ah

• Hithium: 280Ah, 314Ah

• REPT: 280Ah, 314Ah

• CATL: 280Ah, 302Ah

• Cornex: 280Ah, 314Ah

Advanced JK B2A8S20P Smart BMS

Safety and longevity are at the core of this kit. The pre-installed JK B2A8S20P Active Balance BMS provides:

• 2A Active Balancing: Keeps cell voltages consistent to maximize battery lifespan.

• 200A Continuous Discharge: Powerful enough for high-wattage inverters and appliances.

• Bluetooth APP Monitoring: Real-time tracking of SOC, voltage, and temperature via the JK BMS App.

• Comprehensive Protection: Overcharge, over-discharge, overcurrent, short circuit, and high/low-temperature safeguards.

Plug-and-Play Front Panel Design

Skip the complex wiring. Our front panel is designed for maximum convenience:

• 50A Anderson Charging Port: Dedicated port for plug-and-play charging without using the main M8 terminals.

• Real-Time 3.2-inch Display: Monitor your battery status at a glance without needing your phone.

• Built-in DC Outputs: Includes a 12V Cigarette Lighter socket and USB ports for charging mobile devices and small electronics directly.

Complete Packing List (Everything Included)

This kit contains all the mechanical and electronic components needed for assembly (Cells Not Included):

• 1x Stainless Steel Battery Case (Durable & Corrosion-resistant)

• 2x High-Current Terminals (1 Positive, 1 Negative)

• 1x 3.2-inch LCD Status Display

• 1x 50A Anderson Connector (Pre-installed)

• 1x 12V Cigarette Lighter & USB Module

• 3x Flexible Busbars (Allows for cell thermal expansion)

• 5x Epoxy Insulation Plates (For safety and cell separation)

• 3x High-Temp Silicone Wires (BMS B- to cell, BMS P- to negative, Cell to positive)