Deye Three-Phase On-Grid Inverter SUN-25K-G05, 25kW

This is a grid-connected inverter, without a battery, designed for buildings with medium consumption: small industrial halls, offices, farms. It takes the current produced by the panels and transforms it into the current used by the building's installation, and the surplus goes into the grid. It has no backup role during a power outage; instead it is simple, light and efficient, converting into useful current almost all the energy received from the panels.

The 25 kW on the grid side allow up to 32.5 kW of panels to be installed, that is an oversizing that brings more energy in the weak hours and in the winter months. The panels are split over two independent inputs, each with two strings, and each input accepts up to 26 A, enough for modern modules, which deliver high currents. The wide operating range, 200-1000 V, and the maximum voltage of 1100 V leave room for long strings and for very cold days, when the panel voltage rises. The unit weighs 20 kg and measures 362 x 527 x 220 mm, so wall mounting is simple for the power it has; the IP65 enclosure resists dust and water, and the air cooling is intelligently controlled, the fans starting only when needed. Maintenance is limited to periodically cleaning the cooling openings and checking the connections.

Rated AC power 25 kW, maximum apparent power 27.5 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 41.7 A / 39.8 A, power factor adjustable between 0.8 capacitive and 0.8 inductive, THDi below 3%. PV input: maximum power 32.5 kW, maximum input voltage 1100 V, nominal voltage 600 V, start-up from 250 V, MPPT range 200-1000 V, 2 trackers with 2+2 strings, maximum operating currents 26+26 A and short-circuit currents 39+39 A. Maximum efficiency 98.50%, European efficiency 98%, transformerless topology, intelligently controlled air cooling, IP65, 362 x 527 x 220 mm, 20 kg, operating temperature -25...+60 degrees C, RS485 and RS232 communication, standard warranty 5 years.

Who it suits

Suitable for a company, a farm or an office building with a 25-32.5 kWp installation without a battery, especially when modern modules with a high string current are used.

Terms explained

• DC oversizing: Installing a panel power greater than the inverter power; a little is lost at the peak of sunny days, but energy is gained in the morning, in the evening and in winter.
• Short-circuit current (Isc): The maximum current a string of panels can deliver in the worst case; the inverter must withstand it, otherwise the panels on that input must be reduced.
• THDi: A measure of how clean the current delivered into the grid is; a low value means that the installation does not disturb other connected equipment.

Technical specifications

Recommended applications

• Commercial installations of 25-32 kWp on industrial halls and office buildings
• Agricultural prosumers and small factories
• Systems with high-current modules (Isc up to 39 A per MPPT)
• Groupings of several inverters for parks of a few hundred kW

Warranty

5 years

Technical details

Specifications confirmed from the manufacturer's datasheet

Deye SUN-25K-G05 belongs to the G05 series of three-phase string inverters (18-25 kW) and has a rated AC power of 25 kW, with a maximum apparent power of 27.5 kVA. The photovoltaic side accepts up to 32.5 kW of PV power, an input voltage of maximum 1100 V and a nominal voltage of 600 V, with start-up from 250 V and MPPT tracking in the wide range 200-1000 V.

Two MPPT trackers are available, each with two strings (2+2), maximum operating currents of 26+26 A and maximum short-circuit currents of 39+39 A, which allows modern high-current modules to be used without limitations.

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 41.7 A / 39.8 A. The power factor is adjustable between 0.8 capacitive and 0.8 inductive, and the THDi is below 3%. The maximum efficiency reaches 98.50%, and the European efficiency 98%.

The inverter has a transformerless topology and intelligent air cooling, an IP65 enclosure, dimensions of 362 x 527 x 220 mm and a weight of only 20 kg, which simplifies wall mounting. The operating range is -25...+60 degrees C, communication is via RS485 and RS232, and the standard warranty is 5 years.