Deye Three-Phase On-Grid Inverter SUN-125K-G01P3-EU-AM8, 125kW

This is a high-power inverter for commercial and utility-scale photovoltaic plants. It gathers the current produced by hundreds of panels and converts it into the current delivered into the building's installation or into the grid, with very low losses. It does not work with a battery, so it has no backup role during an outage; it is a production device, designed to work for years on end with minimal intervention. It has eight independent inputs for panels, which allows a large array to be divided into many separately handled zones.

The 125 kW of output power accepts up to 187.5 kW of panels, that is a significant oversizing, which brings extra energy in the morning and evening hours and in the winter months. The panels are connected in 32 strings, four on each of the eight inputs, with 40 A maximum current per input, so the designer can match roof or ground configurations exactly. The wide operating range, 200-1000 V, and the maximum input voltage of 1100 V leave room for long strings and for very cold mornings, when the panel voltage rises. At 1006 x 516 x 325.5 mm and 103 kg it requires a load-bearing structure and lifting equipment; the IP65 enclosure withstands dust and water, and above 45 degrees C the power decreases in a controlled way, so a well-ventilated location matters. The AFCI protection can be ordered optionally, detecting the electric arc on the direct-current side, an additional fire safety measure.

Rated AC power 125 kW, maximum apparent power 135 kVA, output 220/380 V or 230/400 V (0.85-1.1 Un), 50 Hz (45-55) or 60 Hz (55-65), maximum AC current 204.6 A / 195.7 A, power factor adjustable between 0.8 capacitive and 0.8 inductive, THDi under 3%. PV input: maximum power 187.5 kW, maximum input voltage 1100 V, nominal voltage 600 V, start-up from 250 V, MPPT range 200-1000 V, 8 trackers with 4 strings each (32 strings) and 40 A maximum operating current on each MPPT. Maximum efficiency 98.80%, European efficiency 98.20%, AFCI available optionally, transformerless topology, intelligently controlled air cooling, IP65, 1006 x 516 x 325.5 mm, 103 kg, operating temperature -25...+60 degrees C with derating above 45 degrees C, RS485 and RS232 communication, standard warranty 5 years.

Who it suits

Suitable for ground-mounted photovoltaic parks and very large industrial roofs, with over 180 kWp on each inverter, where a high ratio between panel power and inverter power is sought.

Terms explained

• AFCI: A system that detects the spark produced by a loosened connection on the direct-current cables and shuts down the installation, reducing the fire risk.
• Panel string: A group of panels connected one after another; 32 strings means that a large array can be divided into many groups, handled separately.
• Maximum input voltage: The voltage limit the device withstands on the panel side; it matters on very cold mornings, when the panels deliver a higher voltage than during the rest of the day.

Technical specifications

Recommended applications

• Utility-scale photovoltaic plants and ground-mounted parks
• Large industrial roofs (over 180 kWp per inverter)
• Projects with a high DC/AC ratio (up to 1.5)
• Installations requiring DC arc fault detection (optional AFCI)

Warranty

5 years

Technical details

Specifications confirmed from the manufacturer's datasheet

The Deye SUN-125K-G01P3-EU-AM8 is part of the G01P3-EU-AM8 series (120-136 kW) of three-phase string inverters for commercial and utility photovoltaic plants. The rated AC power is 125 kW, with a maximum apparent power of 135 kVA.

The photovoltaic side accepts up to 187.5 kW of PV power, a maximum input voltage of 1100 V and a nominal voltage of 600 V, with start-up from 250 V and MPPT tracking over a very wide range, 200-1000 V. The inverter has 8 MPPT trackers with 4 strings each (32 strings in total) and 40 A maximum operating current on each MPPT, which allows a high DC/AC ratio and great granularity in string design.

The AC output is 220/380 V or 230/400 V (0.85-1.1 Un), at 50 Hz (45-55) or 60 Hz (55-65), with a maximum current of 204.6 A / 195.7 A. The power factor is adjustable between 0.8 capacitive and 0.8 inductive, and THDi is under 3%. The maximum efficiency is 98.80%, and the European one 98.20%. The AFCI protection (DC arc fault detection) is available optionally.

In construction, the inverter has an IP65 enclosure, transformerless topology and intelligent air cooling, dimensions of 1006 x 516 x 325.5 mm and a weight of 103 kg. The operating range is -25...+60 degrees C, with derating above 45 degrees C. Communication is via RS485 and RS232, and the standard warranty is 5 years.