SPT Series 15–25kW On-Grid PV Inverter
SPT Series (15–25kW) is a high-efficiency, three-phase on-grid solar inverter range designed for medium-scale commercial PV applications with dual MPPT and IP65 protection.
The SPT Series (15–25kW) is a high-performance, three-phase solar inverter designed for medium-scale commercial and industrial PV systems. Built for on-grid applications, it offers exceptional energy efficiency, intelligent MPPT control, and long-lasting durability, making it perfect for medium-sized solar installations.
Equipped with dual MPPT trackers, the SPT Series maximizes energy harvest from your solar array—even in partially shaded conditions. Its wide MPPT voltage range (480–850V) and high input voltage (1,100VDC) provide flexibility in system design and allow for oversizing up to 150%. With a peak efficiency of 98.75%, the inverter reduces energy loss and enhances your return on investment.
Housed in a rugged IP65-rated enclosure, the SPT inverter is suitable for outdoor installations and operates in extreme conditions, from -30°C to +60°C. It also features built-in USB/RS485 communication and optional WiFi/GPRS modules, enabling seamless remote monitoring and management via a mobile app or PC.
Whether you're powering a commercial rooftop, industrial facility, or distributed solar plant, the SPT Series combines advanced technology with robust design to ensure long-term performance, reliability, and energy savings.
| Product Model | SPT15KTL | SPT17KTL | SPT20KTL | SPT22KTL | SPT25KTL |
| DC Input | |||||
| Maximum DC Input Voltage | 1,100VDC | ||||
| Maximum DC Input Power | 18,000W | 20,000W | 23,000W | 25,000W | 28,000W |
| Rated DC Input Voltage | 650VDC | ||||
| MPPT Operating Voltage Range | 180–1,000VDC | ||||
| MPPT Voltage Range (Full Load) | 480V–850V | ||||
| Maximum Input Current of MPPT | 15A*2 | ||||
| PV Short-circuit Current | 36A | ||||
| MPPT Number | 2 | ||||
| Maximum Number of PV Strings per MPPT | 2/2 | ||||
| AC output | |||||
| Rated AC Output Power | 15,000W | 17,000W | 20,000W | 22,000W | 25,000W |
| Maximum AC Apparent Power | 16,500VA | 18,800VA | 22,000VA | 24,000VA | 27,500VA |
| Rated AC Output Voltage | 380VAC/400VAC | ||||
| Rated AC Output Frequency | 50Hz/60Hz | ||||
| Maximum AC Output Current | 25.1A | 28.4A | 33.4A | 36.8A | 41.8A |
| Power Factor | 1 | ||||
| THDi (Total Harmonic Current Distortion) | ＜3% | ||||
| AC Grid Connection Type | 3W+N+PE | ||||
| Efficiency | |||||
| Maximum Efficiency | 98.60% | 98.75% | 98.75% | 98.75% | 98.75% |
| China Effciency | 98.20% | 98.60% | 98.60% | 98.60% | 98.60% |
| MPPT Effciency | 99.90% | ||||
| Others | |||||
| DC Input Connector | H4/MC4 (Optional) | ||||
| AC Output Connector | Connector | ||||
| Cooling Method | Natural cooling | Intelligent fan cooling | |||
| Display | LED/WIFI+APP | ||||
| Self-consumption at Night | ＜1W | ||||
| Communication Port | USB/RS485(included), WIFI/GPRS(Optional) | ||||
| Mechanical parameters | |||||
| Dimension (Length*Width*Height) |
520mm*430mm*210mm | ||||
| Net Weight (kg) | 24.5 | 25 | |||
| Environment Parameters | |||||
| Relative Humidity | 0–100%, no condensation | ||||
| Enclosure | IP65 | ||||
| Operating Temperature Range | -30℃ ~ +60℃ | ||||
| Altitude | ≤ 4,000m | ||||
| Pollution Level | Ⅲ | ||||
| Surge Protection Level | DCⅡ/AC Ⅲ | ||||
Manual
SPT15-25KTL-Manual-EN-V1.1
Datasheet
SPT15-25KTL-DataSheet-EN
Product Highlights
High power density and long life components, stable and reliable.
IP65 Protection, supporting outdoor installation.
Dual MPPT inputs, maximum 150% DC input oversizing.
Maximum DC input voltage of 1,100VDC, maximum string input current of 15A.
Support 110% long term overload.
Optional GPRS and WiFi modules for remote monitoring.
DC Type II & AC Type SPD to prevent lightning damage.
Support anti-backflow function(optional).
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