SD Energy 12V 400Ah M PLUS is a metal-case lithium energy storage solution designed for those seeking maximum physical durability and advanced technical features in camper van, boat and off-grid energy storage systems. This special “M” series is equipped with an industrial-grade, impact-resistant metal enclosure, a built-in LCD display showing real-time state of charge, Grade A LiFePO4 cells, a JK BMS board from a leader in lithium battery management, and a superior 5-year warranty. With both its LCD display and integrated Bluetooth connection, it provides the convenience of monitoring your energy in two ways.
SD Energy 400Ah M PLUS delivers a massive net energy reserve of 5120Wh (5.12 kWh) in a dedicated metal enclosure that provides complete protection against vibration and impact in demanding road conditions. The high-resolution LCD display integrated into the enclosure allows you to instantly view the battery’s remaining capacity and voltage without checking your phone. The active balancing algorithm of its intelligent JK BMS board maximizes cell life, maintaining first-day battery performance for 6,000 cycles at 80% DoD. It also provides exceptional stability, even with devices drawing very high discharge current, with support for 450A peak current during start-up surges.
Industrial Metal Enclosure: An ultra-durable outer housing that protects against impacts, vibration and demanding environmental conditions in camper van and boat installation areas.
Built-in LCD Display: Easily monitor the state of charge, total voltage and system status directly from the battery.
Genuine LiFePO4 Cells: Quality from a pioneer in the global lithium market, delivering high-current stability and maximum cycle life.
Smart JK BMS & Bluetooth: Active cell balancing helps prevent overheating, while the mobile app enables wireless monitoring of each cell’s voltage with millivolt precision.
High Peak Power (350A): Compared with standard 400Ah models, it successfully operates heavy inverter loads with 350A peak-current support for up to 10 seconds during start-up surges.
5-Year Assurance: A one-to-one replacement with a new product warranty for manufacturing defects during the first two years, followed by a free technical repair warranty for the next three years.
| Specification | Technical Details (SD Energy 400Ah M Plus) |
|---|---|
| Brand / Model / Series | SD Energy 12V 400Ah M Plus (Metal Case Series) |
| Cell Chemistry | Lithium Iron Phosphate (LiFePO4) Prismatic |
| BMS Technology | JK BMS (with integrated Bluetooth and active balancing) |
| Enclosure Construction / Material | Impact-resistant industrial metal enclosure |
| Visual Display | Integrated LCD display screen |
| Nominal Voltage / Capacity | 12 V / 400 Ah |
| Total Stored Energy | 5,120 Wh (5.12 kWh) |
| Charge / Discharge Cut-off Voltage | 12.8 V (Max.) / 11.6 V (Min.) |
| Standard Continuous Charge / Discharge Current | 300 A / 300 A |
| Peak Charge / Discharge Current (Pulse – 10 sec) | 450 A / 450 A |
| Communication / Connectivity | Bluetooth (supports the JK BMS mobile app) |
| Dimensions (W × D × H) | 395 × 560 × 170 mm |
| Net Weight | 50 kg (including durable metal enclosure) |
| Operating Charging / Discharge Temperature | 0°C to 45°C / -5°C to 60°C |
| Cooling Method | Natural Cooling |
| Cycle Life | 6,000 cycles (80% DoD) |
| Warranty Period | 5-year warranty (2 years replacement + 3 years repair) |
| Certifications and Standards | UN38.3, CE, MSDS, ISO, RoHS, UL |
