Product overview
The product is an integrated intelligent inverter with built-in charge controller system designed for large photovoltaic power Its built-in controller can realize charge management for a battery pack by multiple solar arrays to improve charge efficiency and life of the battery pack. Thanks to its full digital vector control technology based on real-time processing by DSP,MCU and DDC,it has perfect protection functions and high reliability. Its mains supply preferred mode,and battery preferred mode are all settable,thus making it easy to meet the different application needs of users. It has an LCD .It is widely applied to large solar power generation occasions including families schools, public lighting, industrial and mining enterprises, frontier defense, sea islands, pasturing areas, etc.
Features
◆Pure sine wave 220VAC/230VAC
◆Built-in MPPT 100A
◆Lithium battery activation function Utility
◆Compatible work with LiFePO4 battery via RS485
◆Pure Sine Wave -Power factor 1.0
◆LCD real-time display of the device parameters, running state at a glance
◆Detachable dust cover for harsh environment
◆Low frequency(Built in Square transformer)
◆Support multiple output priority: SBU,SUB
◆Communication interface:RS232/RS485/Dry contact
◆EQ function to optimize battery performance and extend lifecycle
| Model | NKD-10KW | NKD-15KW | NKD-20KW | NKD-30KW |
| Rated Power | 10KW | 15KW | 20KW | 30 KW |
| Battery | Battery Voltage | 192VDC/220VDC/240VDC |
| Voltage of Over discharge protection | 168VDC/189VDC/210VDC |
| Restart voltage after low battery | 216VDC/243VDC/270VDC |
| MPPT Controller | Controller Types | With maximum power point tracking (MPPT) function controller |
| Rate Current | Solar1: 50A;Solar 2: 50A |
| Current Limiting Protection | Solar1: 52A:Solar 2: 52A |
| Rate Voltage | 192VDC/220VDC/240VDC |
| Operating Voltage Range | 260-420VDC |
| Charge mode | Three stages:constant current (quick charge), constant pressure, floating charge |
| Battery Type | Sealed lead-acid battery, colloidal lead-acid battery, open lead-acidbattery (you can customize parameters to charge other types of batteries) |
| PV module input power | 192VDC:Solar 1,10KW； Solar 2,10KW； 220VDC:Solar 1,11.5KW； Solar 2,11.5KW； 240VDC:Solar 1,12.5KW； Solar 2,12.5KW； |
| Vmax-pv | <420VDC |
| Vlow-py | 240VDC/250VDC/270VDC |
| Vstar-pv | 260VDC/270VDC/290VDC |
| Vovet-pv | 425VDC |
| Floating Charge Votage (Lead Acid Battery) | 220.8VDC/248.4VDC/276VDC (Can be customized) |
| Average charging Voltage (Lead Acid Battery) | 232VDC/261 VDC/290VDC(Can be customized) |
| PV module utilization | ≤99.97% |
| Machine Efficiency | ≥96.5% |
| Output Regulation Accuracy | ≤±1.5% |
| Temperature Coefficient | ±0.02%/°C |
| Protective function | Input/output overvoltage protection,anti reverse protection,short circuit protection,over temperature protection,etc. |
| Inverter | Input voltage | 380VAC±20% |
| Input Frequency | 50Hz/60Hz±5% |
| Output Voltage | 220VAC±5% |
| Output Frequency | 50/60Hz±1% |
| Output wave | pure sine wave THD<4%(full load) |
| Conversion time | 1~3s |
| Overload | 120%/20S; >150%/100ms; |
| Efficiency | ≥90% (100% resistive load) |
| Accuracy Of Load Transient Voltage | <±5% ( 0-100% ) |
| Defensive function | -10-40°C |
| Operating ambient temperature | Output short circuit, overvoltage, low voltage, low battery power protection |
| Environment relative humidity | 20-90%(No Condensation) |
| Product Size: L*W*H (mm) | 536*560*1015 | 635*566*1295 |
| Weight(Kg) | 148 | 165 | 182 | 252 |
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