Complete 48V 280Ah DIY LiFePO4 battery box kit with Smart 16S 200A BMS, active balancing, fan cooling, LCD monitoring and CAN/RS485 communication. Battery cells are not included.
Need to confirm cell dimensions, inverter protocol or kit configuration? Our engineering team can help before ordering.
Built for DIY energy storage projects that require a complete enclosure, smart BMS integration and flexible LiFePO4 cell configuration.
The Seplos MASON-280-FN-DIY kit provides a complete hardware platform for assembling a high-capacity LiFePO4 energy storage battery. It combines the battery enclosure, Seplos smart BMS, connection boards, busbars, active balancing hardware, fan cooling, fuse protection, LCD display, wiring and essential assembly components in one integrated package.
Designed for compatible 280Ah and 304Ah prismatic LiFePO4 cells, the Mason platform supports residential solar storage, off-grid power and scalable low-voltage energy storage projects. CAN and RS485 communication help integrate the completed battery with supported inverter systems, while Bluetooth monitoring provides convenient access to battery operating data.
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Integrated Seplos smart BMS provides cell monitoring, charge and discharge protection, system communication and real-time battery management.
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Cell balancing helps reduce voltage differences between cells and supports more stable operation in high-capacity LiFePO4 battery packs.
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Wireless battery monitoring provides convenient access to operating data and key BMS information during commissioning and daily use.
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The kit combines the enclosure, BMS, PCB boards, busbars, wiring and assembly hardware for a cleaner and more organized battery build.
Compatible cell and inverter details are covered in the dedicated system integration section below.
The complete Mason package list is preserved below. Main parts, auxiliary components and screw hardware are separated into three structured tables for faster checking without losing any original BOM detail.
The package tables preserve complete quantities, specifications, mounting hardware and connection components for this Mason configuration.
| No. | Qty | Item / Description |
|---|---|---|
| 1 | 1 | Battery Case (Main Box, Front Panel, Top Bracket, Front Bracket, Top Cover) |
| 2 | 1 | 48V 200A 16S Seplos BMS |
| 3 | 1 | 40V Fan |
| 4 | 1 | 2A 16S Relay Active Balance |
| 5 | 1 | 80V 400A Fuse with Base |
| 6 | 4 | Handle and Stand |
| 7 | 2 | PCB Board for BMS and Cell Connection |
| 8 | 3 | Upper and Lower Latch Lock |
| 9 | 1 | LCD Screen |
| 10 | 1 | LCD Screen Sticker |
| 11 | 4 | Button Cap |
| 12 | 8 | Wires (LCD Screen Wire, LED Wire, B+ Wire, Fan Power Wire, PCB Board A, and PCB Board Connector) |
| 13 | 2 | Battery Terminals (P+ Terminal and P- Terminal) |
| 14 | 1 | ON-OFF Switch |
| No. | Qty | Item / Description |
|---|---|---|
| 1 | 6 | Copper Bus Bars (BMS Connection) |
| 2 | 15 | Aluminum Bus Bars (Cell Connection) |
| 3 | 10 | Epoxy Sheet (Between Cell and the Case) |
| 4 | 26 | EVA Tape (Between Cells) |
| 5 | 1 | PC Sheet (Top Cover) |
| 6 | 4 | Terminal Dustproof Cap |
| 7 | 3 | Dustproof Net |
| No. | Qty | Item / Description |
|---|---|---|
| 1 | 32 | Hex Flange Nut M6 (To Fix the Aluminum Bus Bars) |
| 2 | 12 | Phillip Hex M4 × 8mm (PCB Board Fix) |
| 3 | 9 | Phillip Hex M5 × 8mm + Washer + Spring Set (Ground Cable and Top Bracket Fix) |
| 4 | 7 | Phillip Hex M6 × 25mm + Washer + Spring Set (Front Panel Fix) |
| 5 | 6 | Phillip Round M3 × 8mm + Washer + Spring Set (BMS Fix) |
| 6 | 4 | Phillip Round M3 × 6mm + Washer + Spring Set (LCD Screen Fix) |
| 7 | 12 | Phillip Pan M5 × 10mm (Latch Fix) |
| 8 | 16 | Hexagon Socket Pan M4 × 10mm (P+/P- Terminals Fix) |
| 9 | 42 | Hexagon Socket Countersunk M4 × 10mm (Handle and Battery Case) |
| 10 | 6 | Phillip Hex M6 × 14mm + Washer + Spring Set (Foot Fix) |
| 11 | 5 | Phillip Hex M8 × 10mm + Washer + Spring Set (P+/P- Bus Bar Fix) |
| 12 | 4 | Hex Flange Nut M4 |
| 13 | 4 | Phillip Round M4 × 8mm + Washer + Spring Set |
| 14 | 4 | Phillip Round M4 × 35mm + Washer + Spring Set |
Key product-specific technical data for this Mason DIY battery configuration.
Review the key system configuration before confirming cell compatibility, inverter communication and final installation requirements.
Cell dimensions and inverter compatibility are covered in the dedicated sections below.
Electrical, BMS, communication and enclosure specifications.
| BMS | Smart 16S 200A (Max 32pcs In Parallel) |
| Waterproof class | IP20 |
| Battery Size | (L*W*H)817*414*267mm |
| Weight(Kits) | 28kg |
| Display | LCD Screen |
| Battery Management System | Built-in BMS |
| Inverter Communication | CAN/RS485 ×2 |
Check the supported LiFePO4 cell dimensions and terminal spacing for this Mason enclosure, then use the official assembly resources before installation.
Model, cell brand, physical dimensions and electrode distance.
| Model | Brand | Cell Dimension | Electrode Distance |
|---|---|---|---|
| MASON-280A | GF 280AH | 72*174*204 MM | 123 MM |
| LISHEN 280AH | |||
| EVE 280K | |||
| MASON-280C | EVE 280AH | 72*174*200 MM | |
| MASON-280B | EVE 304AH | 72*174*204 MM | 89 MM |
If your LiFePO4 cell is not listed, verify the dimensions and electrode spacing with Seplos engineering before assembly.
Access assembly, operating and installation resources without interrupting the compatibility data above.
Step-by-step assembly reference for enclosure, BMS, busbars and internal hardware.
Operating instructions, wiring references and system configuration information.
Watch the Mason battery assembly process and key installation steps before commissioning.
Seplos low-voltage battery systems support communication with a wide range of mainstream inverters through CAN and RS485 protocols.
Protocol support at a glance
CAN and RS485 communication protocol reference.
| Brand | Protocol | Communication | Version |
|---|---|---|---|
| Pylontech | CAN-Bus-Protocol-PYLON | CAN | V1.3 |
| Goodwe | Goodwe Communication Protocol | CAN | V1.5 |
| Lolis | CAN Communication Protocol | CAN | V1.0 |
| Sofar | BMS CAN BUS Protocol | CAN | V1.0 |
| SMA | FSS-ConnectingBat-TI-EN-20W | CAN | V2.0 |
| Victron | Can-Bus_Bms_Protocol | CAN | V1.0 |
| LUXPOWER | Luxpowertek Battery CAN Protocol | CAN | V1.0 |
| Studer | Technical Specification Studer BMS Protocol | CAN | V1.03 |
| TBB | TBB BMS CAN Communication V1.02 | CAN | V1.02 |
| Deye | CAN-Bus-Protocol-PYLON-V1.3 | CAN | V1.0 |
| Sorocec | 2_CAN Protocol 1.0 | CAN | V1.0 |
| MEGAREVO | Hybrid Inverter_5K_BMS Protocol V1.01 | CAN | V1.01 |
| Amensolar | CAN-Bus-Protocol-PYLON | CAN | V1.0 |
| MUST | PV1800F-CAN Communication Protocol | CAN | V1.04.04 |
| AFORE | Luxpowertek Battery CAN Protocol | CAN | V1.0 |
| Pylontech | RS485-Protocol-Pylon-Low-Voltage | 485 | V3.5 |
| Voltronic Power | Voltronic Inverter And BMS 485 Communication Protocol | 485 | V1.0 |
| SRNE | PACE BMS Modbus Protocol For RS485 | 485 | V1.3 |
| Deye | RS485-Protocol-Pylon-Low-Voltage | 485 | V1.0 |
Tell us your cell model, inverter brand and project requirements. Our team can help confirm compatibility, configuration and the right Mason DIY solution before you order.
Your project information will only be used to evaluate your inquiry and provide relevant product or technical support.
