Deye SUN-60K-G (60 kW) - three-phase grid-tie inverter

Sixty kilowatts: the point where the engineering changes

The SUN-60K-G feeds 60 kW into a three-phase grid and accepts an array of up to 78 kW across four MPPT trackers with three strings each. It is the first model in this catalogue to leave the compact housing of the series for the large one: 700 × 575 × 297 mm at a weight of 60 kg. Sixty kilograms is no longer a two-person lift — it needs four people, a chain hoist, or assembly on a prepared frame that is then raised as a unit. The 60 kW rating itself corresponds to a mid-sized industrial site: a workshop of several hundred square metres, a greenhouse complex, a cold store, a small factory. The inverter is grid-tie with no battery input and stops together with the grid during an outage, so backing up critical processes requires separate equipment.

A 45–55 Hz frequency window: why it matters in Ukraine

The datasheet quotes a grid operating range of 45–55 Hz for fifty-hertz networks, while the SUN-30K-G04 (item 2051) and SUN-50K-G03 (item 2072) are limited to a narrower 47–52 Hz window. The difference becomes tangible on an unstable power system: during emergency frequency sags a narrow-window inverter disconnects and returns only after a hold time, whereas a wide-window one keeps running. On a site where generation covers part of its own consumption, every such disconnection is not only lost kilowatt-hours but also a jump in grid draw at the worst possible moment. The limits should be understood: the effective range is set by the configured grid code, and under Ukrainian connection rules the inverter will follow the operator's requirements rather than the datasheet maximum. The hardware margin is nevertheless there, which separates this unit from models where the narrow window is physically fixed.

One hundred amps per phase: the site's power section

Rated output current is 90.9 A per phase at 380 V and 87 A at 400 V, with a maximum of exactly 100 A, so the line is designed around a 125 A breaker and 50 mm² copper cable. At these currents aluminium cable of a larger cross-section is often the smarter choice on price, but it demands correct lugs and an annual torque check. Route length becomes critical: over fifty metres to the main board, voltage drop must be calculated, otherwise the inverter raises its output voltage and trips on overvoltage. A type II AC surge protection device is mandatory, as is a separate isolator for safe shutdown during maintenance. The connections themselves use an IP65 plug on the grid side and MC4 connectors on the panel side; everything beyond that belongs to the site's electrical design.

A 78 kW array and zero export

An array-to-rating ratio of 1.3 means up to 78 kW of panels can be connected to this 60 kW inverter. For a commercial site in Ukraine that most often goes together with zero-export operation: the operator permits generation for own needs but forbids feeding the surplus into the grid. In that mode oversizing is essential, because it lifts the morning and evening parts of the curve, when the business is already working and the sun is still low. Controlling zero export requires a meter or current transformers at the incomer that report present consumption to the inverter, which then limits output in real time. This has to be designed in before installation: without measurement at the incomer no software limit will function, and breaching the contract risks the operator disconnecting your generation.

98.3 % European efficiency at a 78-kilowatt scale

Peak efficiency is 98.7 % and the European weighted figure is 98.3 %, noticeably above the 98 % of the smaller models in the series. At industrial scale three tenths of a percent turn into real money: a 78 kW array produces around 80 MWh a year, so every tenth of a percent is worth roughly 80 kWh. The higher figure comes from the fact that the unit spends most of the day in the 30–70 % load band for which the power stage is optimised. MPPT efficiency above 99 % matters on large arrays with moving shadows from neighbouring buildings or masts: the algorithm keeps up and does not stick on a local maximum. Harmonics below 3 % are no formality on a site with motors and variable-frequency drives — they are the condition under which your own equipment avoids extra heating from a dirty sine wave.

Mounting sixty kilograms: planning the space and the lift

A housing 700 mm wide and 575 mm tall needs a load-bearing wall or a welded frame rated for at least double the weight. Raising it to working height calls for a chain hoist on a beam or four people with props, with the mounting rail fixed and levelled beforehand. Leave at least thirty centimetres of free air above and to the sides: sixty kilowatts of conversion at peak means several hundred watts of heat that must go somewhere. Noise of up to 50 dB allows a plant room but not an office area or a position next to workstations. The IP65 housing tolerates outdoor installation, though for a device of this class a protected room with controlled access and clear approach from all sides is the better arrangement.

Twelve strings and industrial-grade monitoring

Four trackers of three strings give twelve separate current and voltage curves, uploaded to the cloud over Wi-Fi, LAN, RS485 or RS232. On an industrial array of two hundred panels this is the only way to spot degradation: one failed string is about eight percent of generation, easily written off as weather in a summary graph. Set up comparison between strings inside each tracker — rows with identical orientation should produce identical curves, and any steady deviation above five percent signals a problem. Ground fault monitoring catches deteriorating insulation at an early stage, which is especially valuable across several hundred metres of DC cable. The event log preserves the reason for each shutdown and becomes your evidence if the inverter keeps stopping because of grid parameters rather than its own faults.

How it differs from its neighbours in this catalogue

The SUN-50K-G03 (item 2072) has the same four trackers and twelve strings but 50 kW at 44.5 kg, so if your connection does not exceed fifty kilowatts it wins on installation simplicity. The SUN-80K-G (item 2069) uses this very 700 × 575 mm housing and weighs the same 60 kg, yet delivers 80 kW with a 104 kW array on four strings per tracker, giving a third more output for identical installation effort. The SUN-100K-G03 (item 2076) and SUN-110K-G03 (item 2071) move to an 838 mm housing at 81 kg with six trackers — that is a dedicated room and a formal design. Further down the range the SUN-35K-G04 (item 2065) with three trackers remains the choice for sites up to forty kilowatts. Every G-series model stops alike when the grid disappears, so if production cannot tolerate downtime, backup must be built on three-phase LP3, SM2 or HP3 hybrids, or on a generator.

Send us a single-line diagram of the site, a daily consumption profile and the terms of your connection agreement, and we will size the inverter and the zero-export scheme around your production.