| Brand Name : | Weco |
| Model : | SL-4k4 LT LV/HV |
| Nominal Capacity : | 4.76 kWh |
| Usable Capacity : | 4.4 kWh |
| Single Module Nominal Voltage : | 51.2 Vdc |
| Voltage Range : | 46.5 – 56.8 Vdc |
| Usable Capacity (Ah) : | 86 Ah (Gross 93 Ah) |
| Depth of Discharge : | Up to 98% |
| Max Charge / Discharge Current : | Up to 1C max |
| Standard Charge / Discharge Current : | 0.5C |
| Modules Expandability : | 15 direct parallel (105 with LV HUB accessory) |
| Cluster Net Capacity : | 66 – 462 kWh (with LV HUB for multi-cluster application) |
| Dimensions (W × D × H) : | 492 × 580 × 155 mm |
| Weight : | 46 kg |
| Ingress Protection : | IP20 (indoor application only) |
| Discharge Temperature : | -20 ~ +60 °C |
| Charge Temperature : | -5 ~ +55 °C |
| Standard Temperature Range : | 25 °C ± 10 °C |
| Humidity : | 5% – 95% (no condensation) |
| Altitude : | < 3000 m |
| Expected Cycle Life @ STC : | > 6,000 cycles (25 °C) |
| Performance Warranty : | 10 years |
| Communication Interface : | RS485, CAN, RS232, Wi-Fi & Bluetooth (with external device) |
| Certifications : | CB / IEC62368-1 / IEC62619 / CE / EMC / UN38.3 |
| I/O : | 2 × programmable DI/DO |
| Monitoring : | Optional external device with WeCo App (Android / iOS) |
| Protection System : | Pre-Charge + MOSFET Protection, Three Protection Levels, Real-Time Balancing, Adaptive Charge |
The SL-4k4 LT is engineered around Weco’s adaptive BMS with Discharge CAN Logic and 3-Step Adaptive Charging, giving installers both tight integration with hybrid inverters and strong lifetime protection for the cells.
Modern Residential Solar Installs
A 4.76 kWh module size lets homeowners start small and scale as loads grow, with parallel expansion up to 105 modules when paired with an LV HUB.
Light Commercial and Multi-Cluster Systems
Cluster capacity of up to 462 kWh suits guesthouses, clinics, and small commercial sites that need serious storage without moving to industrial-grade equipment.
Lithium Retrofits on Existing Solar
Direct compatibility with mainstream hybrid inverters via CAN or RS485 makes the SL-4k4 LT a practical upgrade from aging lead-acid banks.
Long-Life Off-Grid Investments
6,000+ expected cycles and a 10-year performance warranty make this battery a strong fit for installations where lowest lifetime cost matters more than lowest upfront cost.
Hot and Humid Climates
Wide operating temperature envelope and 5–95% humidity tolerance suit tropical and sub-tropical deployments in protected indoor environments.
