Deye SUN-80K-G (80 kW) - three-phase grid-tie inverter

Eighty kilowatts in the very housing that holds sixty

The SUN-80K-G feeds 80 kW into a three-phase grid and accepts an array of up to 104 kW while staying in the 700 × 575 × 297 mm housing at 60 kg — exactly the one used by the SUN-60K-G (item 2066). For a designer this means something simple: installation cost, wall area, lifting gear and room requirements are identical, while the output is a third higher. Inside are four MPPT trackers, but now with four strings each, giving sixteen independent rows of panels. This is the typical machine for an industrial roof: a warehouse, a poultry farm, a grain elevator, a workshop with tens of kilowatts of daytime load. The inverter is grid-tie and batteryless: it stops when grid voltage disappears, so continuous processes need a separate backup source.

Five hundred volts: the main constraint of this model

Four trackers of 40 A give 160 A of DC in total — exactly the same as the smaller SUN-50K-G03 (item 2072) and SUN-60K-G (item 2066). The rating here is higher, however, so delivering 80 kW requires an array voltage of at least about 500 V, the strictest demand among all three-phase grid-tie models in this catalogue. In practice short strings are unusable: rows of at least fifteen or sixteen modern modules are needed to stay above the threshold even in the heat, when voltage sags. If the roof cannot accommodate rows that long, you end up with an expensive inverter that never reaches its rating, and the SUN-100K-G03 (item 2076) with six trackers, or two smaller machines, becomes the correct answer. Run this calculation before ordering, because it, not the nameplate 80 kW, determines what the meter will actually register.

Sixteen strings and the 40 A per tracker limit

Four strings per tracker look like pure flexibility, but that figure must be read together with the maximum operating current of 40 A. A modern 580–600 W module carries about 13–14 A, so four such strings in parallel produce 52–56 A — well above the limit, and the inverter will simply clip the excess. Four strings per tracker make sense in a different scenario: when rows are shorter, face different directions, or use older modules with lower current. For an array of identical high-current panels the optimum is three strings per tracker — twelve of the sixteen available inputs, with the rest left unused. The 60 A short-circuit rating per tracker provides margin for safe switching, but it does not lift the operating-current limit.

A hundred and thirty-three amps per phase: the power connection

Rated output current is 121.2 A per phase at 380 V and 115.9 A at 400 V, with a maximum of 133.3 A, so the line is designed around a 160 A breaker and 70 mm² copper or 95–120 mm² aluminium cable. Running cable of that size is a job in itself, with trays, supports and bending radii to calculate, and its cost belongs in the budget alongside the equipment. Voltage drop over a long run becomes the principal technical risk: the inverter raises its output voltage to push the current through and trips mid-working-day once the operator's limit is exceeded. Mandatory elements of the scheme are a three-phase breaker, a maintenance isolator and a type II AC surge protection device. Generating 80 kW can only be registered to a company or sole trader, and the permitted capacity in the connection agreement must cover that level.

A 104 kW array: two hundred panels and their upkeep

A maximum array of 104 kW with modern 580 W modules means around a hundred and eighty panels and roughly four hundred square metres of roof. At that scale effects appear that domestic systems never see: uneven soiling, local shadows from ventilation shafts, temperature differences between the centre and the edge of the array. The 1.3 oversizing ratio works here not only on the annual total but on stability: even with two or three rows switched off for maintenance the system still reaches its rating. Washing an array this size is planned at least once a year, and twice on sites near dirt roads or dusty processes, since soiling losses reach five to seven percent. Design safe access to every row from the start: without it, maintenance becomes an expensive operation with a cherry picker rather than routine work.

55 dB of noise and where to put the unit

Typical noise reaches 55 dB, the highest among the models discussed above, and understandably so: converting eighty kilowatts demands intensive airflow across the heatsink. Fifty-five decibels is roughly a loud conversation beside you, so an office area, a staff rest room or a shared wall with either is ruled out immediately. The right location is a plant room, a transformer substation, a separate annex or an outdoor mount under a canopy with restricted access. The IP65 housing and tolerance of 100 % humidity without condensation allow outdoor placement, but direct sun must be avoided: above forty-five degrees the unit reduces power smoothly. The operating altitude without derating is two thousand metres, which covers any industrial site in Ukraine with an enormous margin.

98.3 % European efficiency and the economics of a large plant

Peak efficiency of 98.7 % and a European weighted figure of 98.3 % mean that less than two percent of the energy generated is lost in conversion over a year. A 104 kW array in central Ukraine yields roughly 107 MWh a year, so inverter losses come to about 1.8 MWh — the annual consumption of a small apartment, for comparison. MPPT efficiency above 99 % is critical precisely on arrays like this, where four trackers serve different groups of panels and each must find its own optimum. Night-time consumption below 1 W is irrelevant against such generation and plays no part in payback calculations. Harmonic distortion below 3 % is essential on a site with its own substation: a dirty sine wave at this power level creates real problems for the transformer and for reactive power compensation.

How it differs from its neighbours in this catalogue

The SUN-60K-G (item 2066) in the same housing gives 60 kW and needs only 375 V for full power, which on a roof with short rows is a decisive advantage over the eighty. The SUN-100K-G03 (item 2076) and SUN-110K-G03 (item 2071) move to an 838 × 568 mm housing at 81 kg but carry six trackers of 40 A, giving 240 A of DC and a far lower voltage requirement. The SUN-50K-G03 (item 2072) stays in the light 44.5 kg housing and fits where the connection is capped at fifty kilowatts. The choice between the eighty and the hundred is decided by roof geometry rather than rating: if long rows are impossible, the larger six-tracker model performs better even on a smaller array. And once again, no G-series machine supplies power during a blackout — that requires three-phase LP3, SM2 or HP3 hybrids, or a diesel generator with automatic transfer.

Send us a roof plan with row dimensions and your connected capacity, and we will check whether your array will reach five hundred volts or whether a six-tracker model suits this site better.