50K-4T grid-tied string inverter 50 kW
Country: Germany · Model: 50K-4T
A compact 50 kW inverter for a three-phase 400 V grid with an AC overload capability of 110 %, that is, with an output of up to 55 kVA. It is intended for commercial and industrial rooftop solar plants and for projects modernising old plants.
- Rated power
- 50 kW (max. 55 kVA)
- MPP trackers
- 4 (2 inputs each)
- Max. PV power
- 75 kWp
- DC voltage
- max. 1100 V; MPPT 540–850 V
Technical specifications
| Rated power | 50 kW (max. 55 kVA) |
|---|---|
| MPP trackers | 4 (2 inputs each) |
| Max. PV power | 75 kWp |
| DC voltage | max. 1100 V; MPPT 540–850 V |
| Grid | 3P/N/PE 230/400 V |
| Efficiency | max. 98.8 %, European 98.2 % |
| Protection rating | IP65, −30…+60 °C |
| Dimensions / weight | 480×585×220 mm, 37 kg |
| Protection | DC SPD type I+II, AFCI (option) |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The four MPP trackers have two inputs each, so eight strings with a total peak power of up to 75 kWp are connected to the unit. The lower tracking limit is raised to 540 V, the upper is 850 V, and the absolute maximum DC voltage is 1100 V. The output connects to a 3P/N/PE 230/400 V grid. The highest efficiency is 98.8 %, the European efficiency 98.2 %. The 480×585×220 mm case is the same as for the 25K-3T and 33K-3T, and the weight is only a kilogram more, 37 kg. The operating temperature range is from −30 to +60 °C with an IP65 protection rating. A type I+II SPD is installed on the DC side, and AFCI arc-fault shutdown is available as an option.
How to choose
The deciding factors here are the 50 kW rating and the array limit of 75 kWp. When strings are short and in heat their voltage may fall below 540 V, the 25K-3T or 33K-3T, whose tracking starts from 480 V, are more appropriate. For a roof of 150 or 165 kWp it is simpler to install one 110K-10T or 125K-10T with ten trackers than several 50 kW units.
Request a price and lead time
50K-4T grid-tied string inverter 50 kW. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What does the 110 % AC overload capability in the 50K-4T inverter give?
At a rating of 50 kW the inverter can deliver up to 55 kVA to the grid. The margin in apparent power is needed when the grid operator requires reactive power generation without curtailing active power.
What is the minimum string voltage for tracker operation in the 50K-4T?
MPP tracking works from 540 to 850 V. The string is built so that in summer the operating voltage does not fall below 540 V, and in winter the open-circuit voltage does not exceed 1100 V.
Is the 50K-4T suitable for modernising an old solar plant?
Yes, the model is designed for modernisation projects too. A rating of 50 kW with an array of up to 75 kWp makes it possible to replace several older units of lower power with one.
Where can the 50K-4T be mounted?
The IP65 case withstands −30 to +60 °C, so the unit is installed outdoors on a roof or on a support structure. With a weight of 37 kg the wall or frame must be designed for such a load.
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