The Off-Grid Inverter WTI-NB-12K/48-220-F is a high-capacity power conversion unit designed to manage and regulate electrical energy between multiple sources and loads within an independent power system. Based on the visual structure in the images, the unit adopts a compact wall-mounted metal enclosure with an integrated control panel, featuring a central LCD interface and physical navigation buttons, allowing users to directly access system data and operating status. The front panel includes clearly labeled indicators such as AC, INV, CHG, and FAULT, which provide immediate visual feedback on system conditions and operational states.
From a user interaction perspective, the inverter is engineered for stable and intuitive operation. The 6-inch LCD display provides structured parameter visibility, enabling users to monitor voltage levels, load conditions, and charging status without requiring external tools. The physical button layout supports precise parameter adjustments, reducing the complexity of commissioning and maintenance. With a weight of 15 kg and dimensions of 512 by 432 by 128 mm, the unit maintains a balance between structural robustness and manageable installation. Noise control at 50 dB ensures that the inverter operates within acceptable acoustic levels, contributing to a controlled working environment. The system integrates communication interfaces including RS485, CAN, and WiFi, enabling both local and remote data access, which improves operational transparency and system management efficiency.

| Model | WTI-NB-12K/48-220-F |
| AC Input | |
| Nominal Voltage | 208/220/230/240V ac,L+N+PE |
| Frequency Range | 50/60Hz |
| Input Voltage Range | 90-280 APP;170-264 UPS |
| Current Input (Max Continuous) | 52A |
| AC Output | |
| Output Voltage | 208/220/230/240V ac,L1+N1+L2+N2+PE |
| Rated Power | 12kW |
| Power factor | ≥0.99 |
| Current Output (Maximum Continuous) | 54.5 |
| Max Output Overcurrent Protection / Bypass | 70A/1min |
| Max Output Overcurrent Protection / Battery | 1min@102%~125%Load 10s@>125%Load |
| Battery | |
| Battery Type | LFP |
| Rated Voltage | 48V |
| Voltage Range | 42-58.4V |
| Max Charging Current | 160A |
| Default Charging Current | 100A |
| Default Utility Charging Current | 40A @Utility Only |
| PV Input | |
| Number of MPPT / Strings per MPPT | 2/2 |
| Max DC Input Power | Total 15kW (9kW per MPPT) |
| Max Open Circuit Voltage | 500V dc |
| MPPT Voltage Range | 60-450V dc |
| Startup Voltage | 80V |
| Max MPPT Charging Current | 160A |
| Max DC Input Current | Dual MPPT: 22.5A + 22.5A / Single MPPT: 27A |
| Maxi DC Short Circuit Current | 33A |
| Features | |
| Parallel Operation | - |
| Protection Degree (IP Rating) | IP20 |
| General Parameters | |
| Noise | 50dB |
| Dimensions | 512*432*128mm |
| Weight | 15kg |
| Display and Communication | |
| Display | LCD(6'') |
| Communication | 485/CAN/wifi |
Supporting Solar Power, Mains Power And Battery Connection
DPS Digital Control Technology, Dual-Transformer Online Design, Adopting Input PFC Technology, Input Power Reaches 0.99, Efficient Inverter Topology Output
New Type Of High-Efficiency MOSFET, Less Heat Generation, Smaller Size,longer Lifespan
Combined With WENTAl ESS, Optimized Design, Longer Battery Life
'0' V Start-Up
Equipped With An External WIFI Module, It Can Be Remotely Monitored Via A Mobile App (optional)
