Three-Phase String Inverter · 33-50 kW
MID 33-50KTL3-X2 (Pro.E) Three-Phase String Inverter
Models: MID 33KTL3-X2 (Pro.E) / MID 36KTL3-X2 (Pro.E) / MID 40KTL3-X2 (Pro.E) / MID 50KTL3-X2 (Pro.E)
A three-phase string inverter platform for commercial and industrial PV. Four power classes from 33 kW to 50 kW use three or four MPPT inputs, 20 A high-current strings and a 200-1000 V operating range. The series supports 1.5x DC oversizing, optional high-precision string monitoring and smart IV curve scanning, with IP66 protection for outdoor installation.
33-50 kW
Rated AC output
3 / 4
MPPT inputs
1.5x
DC oversizing
IP66
Protection rating
Product Overview
The MID 33-50KTL3-X2 (Pro.E) series covers 33 kW, 36 kW, 40 kW and 50 kW three-phase models. The 33 and 36 kW models use three MPPT inputs in a 2+2+1 configuration; the 40 and 50 kW models use four MPPT inputs in a 2+2+1+1 configuration. All models provide a 200-1000 V MPPT range and 1100 V maximum DC input voltage.
The platform supports 1.5x DC oversizing, 20 A high-current strings and optional high-precision string monitoring with smart IV curve scanning. Maximum efficiency is 98.8%, China efficiency is 98.5% and MPPT efficiency is 99.9%. Smart air cooling and IP66 protection support outdoor commercial and industrial installations.
Key Features
- Three or four MPPT inputs
- 20 A high-current string design
- 1.5x DC oversizing capability
- 200-1000 V MPPT operating range
- 1100 V maximum DC input voltage
- Optional high-precision string monitoring
- Smart IV curve scanning
- Flexible monitoring and one-click diagnosis
- Smart air cooling
- IP66 protection for outdoor installation
- 5-year standard warranty; 10-year option
Technical Specifications
DC Input
| Parameter | MID 33KTL3-X2 (Pro.E) | MID 36KTL3-X2 (Pro.E) | MID 40KTL3-X2 (Pro.E) | MID 50KTL3-X2 (Pro.E) |
|---|---|---|---|---|
| Maximum DC input power | 49,500 W | 54,000 W | 60,000 W | 75,000 W |
| Maximum DC input voltage | 1100 V | 1100 V | 1100 V | 1100 V |
| Start-up voltage | 200 V | 200 V | 200 V | 200 V |
| MPPT operating voltage range / rated input voltage | 200-1000 V / 600 V | 200-1000 V / 600 V | 200-1000 V / 600 V | 200-1000 V / 600 V |
| Maximum current per MPPT | 40 A / 40 A / 20 A | 40 A / 40 A / 20 A | 40 A / 40 A / 20 A / 20 A | 40 A / 40 A / 20 A / 20 A |
| Number of MPPTs / strings per MPPT | 3 / 2+2+1 | 3 / 2+2+1 | 4 / 2+2+1+1 | 4 / 2+2+1+1 |
AC Output
| Parameter | MID 33KTL3-X2 (Pro.E) | MID 36KTL3-X2 (Pro.E) | MID 40KTL3-X2 (Pro.E) | MID 50KTL3-X2 (Pro.E) |
|---|---|---|---|---|
| Rated AC output power | 33,000 W | 36,000 W | 40,000 W | 50,000 W |
| Maximum AC output apparent power | 36,600 VA | 40,000 VA | 44,400 VA | 55,500 VA |
| Maximum AC output current | 55.5 A | 60.6 A | 67.3 A | 84.1 A |
| Rated output voltage / range | 400 V / 340-440 V | 400 V / 340-440 V | 400 V / 340-440 V | 400 V / 340-440 V |
| Rated grid frequency / range | 50 Hz, 60 Hz / ±5 Hz | 50 Hz, 60 Hz / ±5 Hz | 50 Hz, 60 Hz / ±5 Hz | 50 Hz, 60 Hz / ±5 Hz |
| Power factor | 1 | 1 | 1 | 1 |
| Power factor adjustment range | 0.8 leading to 0.8 lagging | 0.8 leading to 0.8 lagging | 0.8 leading to 0.8 lagging | 0.8 leading to 0.8 lagging |
| THDi | <3% | <3% | <3% | <3% |
| AC connection type | 3W+N+PE | 3W+N+PE | 3W+N+PE | 3W+N+PE |
Efficiency and Protection
| Maximum efficiency | 98.8% |
| China efficiency | 98.5% |
| MPPT efficiency | 99.9% |
| DC reverse polarity protection | Yes |
| DC input switch | Yes |
| DC / AC surge protection | Class II |
| Insulation resistance detection | Yes |
| Anti-islanding protection | Yes |
| AC short-circuit protection | Yes |
| String monitoring | Optional |
| Arc fault detection | Optional |
General Data
| Dimensions (W × H × D) | 580 × 435 × 230 mm |
| Weight | 31 kg / 31 kg / 37 kg / 37 kg (33 / 36 / 40 / 50 kW models) |
| Operating temperature range | -30 °C to +60 °C |
| Maximum altitude | 4000 m (no derating up to 2000 m) |
| Night-time self-consumption | <1 W |
| Topology | Transformerless |
| Cooling | Smart air cooling |
| Protection rating | IP66 |
| Relative humidity | 0-100%, non-condensing |
Interfaces, Warranty and Certification
| DC input connector | H4 / MC4 (optional) |
| AC output connector | Waterproof PG gland + OT terminal |
| Display | LED / WiFi + APP |
| Communication | USB / RS485 standard; WiFi / GPRS / 4G / LAN optional |
| Warranty | 5 years standard; 10 years optional |
| Certification | CQC |
Applications
The series is intended for grid-connected commercial and industrial PV systems that need flexible MPPT count and 1.5x DC oversizing.
- Commercial and industrial rooftop PV
- Distributed generation projects
- Small ground-mounted arrays
- Projects with multiple array orientations
- Systems using high-current PV modules
OEM & Custom Requirements
Project supply and private-label requirements can be confirmed against the standard MID 33-50KTL3-X2 (Pro.E) platform. Share the required power class, string plan, monitoring option and destination market.
- Private-label enclosure and documentation
- Power class selection from 33 kW to 50 kW
- Communication and connector configuration
- Manual localisation for the target market
- Packaging and delivery planning
Need a project-specific quote?
Send us the required power class, string configuration, monitoring option and destination port. We will confirm the model, documentation package and delivery schedule.