Fogstar Energy 12V DIY Kit (EVE Grade A MB31)

Key Features:

• Comprehensive Kit: Includes everything needed to assemble a 12V Fogstar battery, including the case, LiFePO4 cells, accessories, and BMS.
• Capacity: Grade A EVE 314Ah MB31
• Smart BMS: The included JK 200A Smart BMS with 2A Active Balancing and Bluetooth ensures optimal battery performance and safety.
• Durable Construction: The metal case with recessed terminals and ON/OFF switch provides a rugged and reliable housing for your battery.
• Warranty: Backed by a one-year warranty on all components, including cells, BMS, and case.
• Optional touchscreen available - interchange your ON/OFF button for a JK BMS LCD Touchscreen Display (4.3").

Kit Specifications:

• Voltage: 12V
• Capacity: 314Ah
• BMS: JK 200A Smart BMS with 2A Active Balancing and Bluetooth
• Case Material: Metal
• Case Dimensions: L 400 x W 220 x H 265 mm
• kWh: 4032kWh

Cell Specifications:

• Manufacturer: EVE
• Model: MB31
• Size: 173.7mm x 71.7mm x 204.6mm
• Capacity: 314Ah
• Weight: 5.6Kg
• Maximum Discharge: 1C (314A)
• Continuous Discharge: 0.5C (157A)
• Nominal Voltage: 3.2V
• Cycle Life : 8,000 cycles
• Protection: None
  

BMS Specifications:

• Model: 200A
• Balance Current: 2A
• Pack Structure: 4S-8S
• Nominal Voltage Per Cell: 3.2v
• Operating Temperature: -30°C~75°C
• P- / C-Connection Type: M6 Threaded Terminal - 2 each (4 total).

We recommend that users have a solid understanding of electrical systems and components before attempting to build their own battery.

Your Cells Require Top-Balancing

1. Connect the Cells in Parallel – Link all cells positive to positive, negative to negative to equalise their voltage.
2. Charge Slowly to 3.65V – Use a constant voltage power supply with a low current (≤10A). 
3. Hold at 3.65V Until Current Drops Below 1A – Keep charging until the current naturally drops. This means all cells are fully charged and balanced.
4. Disconnect and Assemble Your Pack – Once balanced, disconnect the cells and build your battery. Avoid long-term storage at full charge.

More Information:

Supporting documents are available upon request (UN38.3, Specification Reports & MSDS) - contact our Customer Service team for more information.

• 1 year warranty on all 12V DIY Kits. Fogstar will verify your purchase prior to processing any warranty claims or returns.
• If it is determined that the product is faulty, we will ship a new product to you immediately, you will only be asked to cover the cost of the shipping. 
• Our warranty does not cover items that have been damaged due to gross negligence, normal wear and tear, damage due to accident or collision, abuse or incorrect installation.
• Keep away from animals and children.
• The EVE Grade A MB31 Prismatic batteries usually have a cycle life >8000 cycles before noticeable capacity drop off. Batteries should be recycled at this time.
• Do not crush, incinerate or modify.
• Only use within manufacturers specification.