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SEPLOS Mason 280L 48V 280Ah DIY Kit (14.3Kwh)


Please note: The V2 and V3 Seplos Mason kits are not compatible

The Seplos Mason 280L Kit includes all of the critical components required to create a DIY 48V 14.3kWh battery (prismatic cells sold separately).

We offer both Grade A and Grade B versions of this kit to account for the different terminals found on our EVE LF280K Prismatic Cells (Grade A & Grade B). The overall size of the kit does not change, however, the supplied busbars are different depending on your choice of prismatic cell.

We also offer two different types of BMS, the V2 (pre-December 2023) and V3 (post-December 2023). It's important to note; the V2 and V3 BMS are not compatible. Not sure what kit you have? Get in touch with our team and we'll be happy to help.

We also offer a horizontal, 'modular' version of the Seplos Mason which can be found here.

This kit is also suitable for EVE LF304K cells, to create a 15.5Kwh battery. LiFePO4 Prismatic cells are available to purchase here (16 required).

The kit includes the Seplos BMS (complete with Bluetooth) - which can be used to communicate with several inverters via CAN & RS485 such as Victron, Growatt, Sofar, Solis and more (a full list of inverter protocols can be found here).

Need cells too?
Check out our Seplos Mason Battery Bundles and save up to 15% on your purchase!

The kit includes:

  • 1* Battery Case (Bottom case, Top Bracket, Top cover)​
  • 1 * 48V 200A 16S Seplos BMS
  • 1 * 58V 400A Fuse
  • 4 * Handle
  • 2 * PCB Board for BMS and Cell Connection
  • 3 * Upper and Lower Latch lock
  • 1 * LCD Screen 
  • 1 * LCD Screen Sticker
  • 4 * Button Cap
  • 3 * Wires (LCD Screen wire, PCB board A and PCB board Connector)
  • 2 * Battery Terminals (P+ Terminal and P- Terminal)

Other components included:

  •  6 * Copper bus bars (BMS connection)
  • 15 * Aluminum bus bars (cell connection)
  • 10 * Epoxy sheet (between cell and the case)
  • 26 * EVA Tape (between cells)
  • 1 * PC sheet (top cover)

Screws Details:

  • 12 * Phillip Hex M4 * 8mm (PCB board fix)
  • 9 * Phillip Hex M5 * 8mm + Washer + Spring Set (ground cable and top bracket fix)
  • 7 * Phillip Hex M6 * 25mm + Washer + Spring Set (front Panel fix)
  • 10 * Phillip Round M3 * 8mm + Washer + Spring Set (BMS and LCD Screen fix)
  • 12 * Phillip Pan M5 * 10mm (latch fix)
  • 16 * Hexagan Socket Pan M4 * 10mm (P+/P- Terminals fix)
  • 42 * Hexagan Socket Countersunk M4 * 10mm (Handle and battery case)
  • 4 * Phillip Hex M6 * 14mm + Washer + Spring Set (foot fix)
  • 5 * Phillip Hex M8 * 10mm + Washer + Spring Set (P+/P- Bus bar fix)
  • 8 * Phillip Round M5 * 10mm + Washer

What is not included in this kit that you will need:

  • 16 x EVE LF280K or LF304K - Grade A or B.
  • Inverter Connection Cables
  • CAN or RS485 Communication Cables (often supplied with inverter)
  • Seplos RJ45 to USB Cable (to connect to PC for BMS software)

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