SD Energy 12V 400Ah Plus is a top-tier smart lithium energy storage solution built for those seeking both massive capacity and exceptional power output in camper vans, luxury motor yachts and advanced off-grid energy systems. Equipped with energy-dense Grade A LiFePO4 cells, a high-current JK BMS board for lithium battery management, and a superior 5-year warranty, this “Plus” model provides the convenience of monitoring your complete energy status in real time from your phone through its integrated Bluetooth connection.
While providing a net energy reserve of 5120Wh (5.12 kWh) in a single enclosure, SD Energy 400Ah Plus redefines current-output limits compared with standard 400Ah models. Thanks to its dedicated JK BMS board, it supports 300A continuous discharge current and up to 450A peak current during start-up surges. This lets you operate large residential air conditioners, induction cooktops, microwave ovens and other high-power appliances simultaneously in your camper van, without triggering system protection. Its intelligent active-balancing architecture continuously equalizes cell voltages, keeping the battery in first-day condition for 6,000 cycles at 80% DoD.
High-Current EVE Cells: EVE quality from a leader in the global lithium market, delivering stable voltage under heavy loads and maximum safety standards.
Heavy-Duty JK BMS System: Active cell balancing helps prevent overheating and manages a substantial 300A continuous current flow with comprehensive protection against overcharging, over-discharging and short-circuit risks.
Precision Bluetooth Integration: Wirelessly monitor each lithium cell’s voltage, real-time charge/discharge current and temperature through the mobile app, without opening the battery enclosure.
6,000-Cycle Life at 80% DoD: While conventional gel battery banks can reach the end of their service life within 1–2 years of intensive use, this long-life technology maintains its high first-day performance for up to 6,000 cycles.
5-Year Karavan Market 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 Plus) |
|---|---|
| Brand / Model | SD Energy 12V 400Ah Plus |
| Cell Manufacturer / Chemistry | EVE / Lithium Iron Phosphate (LiFePO4) Prismatic |
| BMS Technology | JK BMS (with integrated Bluetooth and active balancing) |
| Nominal Voltage | 12.8 V |
| Nominal Capacity | 400 Ah |
| Total Stored Energy | 5,120 Wh (5.12 kWh) — equivalent to two 2.56 kWh battery modules |
| Charge Cut-off Voltage (Max.) | 14.6 V |
| Discharge Cut-off Voltage (Min.) | 10.0 V |
| Standard Continuous Charging Current | 200 A |
| Peak Charging Current (Pulse – 10 sec) | 300 A |
| Maximum Continuous Discharge Current | 300 A |
| Peak Discharge Current | 450 A |
| Communication / Connectivity | Bluetooth (supports the JK BMS mobile app) |
| Dimensions (W × D × H) | 520 × 300 × 265 mm |
| Net Weight | 41 kg |
| 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 |
