String inverter Three-phase

G05 Three-Phase String Inverter · 5–25 kW

SUN-5/6/8/10/12/15/20/25K-G05-AU

5–25 kW

Three-phase PV-only string inverters from 5 to 25 kW for grid-tied solar without storage. Every size has two MPP trackers and a max. PV input power of 150% of its rating. Peak efficiency is 98.2–98.5%, zero export is supported with an external meter, and Deye rates the range to AS/NZS 4777.2. There are three chassis: 5–12 kW (11 kg, natural cooling), 15 kW (15 kg) and 20/25 kW (20 kg, 1100 V PV input).

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Available ratings: 5 / 6 / 8 / 10 / 12 / 15 / 20 / 25 kW: SUN-5K … SUN-25K-G05-AU
Rated AC power: 5–25 kW
Phase: Three (230/400 V, 240/415 V)
Max. PV input power: 7.5–37.5 kW (150% of rated)
MPP trackers: 2 on every size (1+1, 1+2 or 2+2 strings)
Max. PV input voltage: 1000 V (5–15 kW) · 1100 V (20/25 kW)
Max. efficiency: 98.2–98.5%
Warranty: 10 years

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Specifications

PV input

Max. PV input power: 7.5 / 9 / 12 / 15 / 18 / 22.5 / 30 / 37.5 kW (5 / 6 / 8 / 10 / 12 / 15 / 20 / 25K)
Max. PV access power: 10 / 12 / 16 / 20 / 24 / 30 / 40 / 50 kW (5 / 6 / 8 / 10 / 12 / 15 / 20 / 25K)
Max. PV input voltage: 1000 V (5–15K) · 1100 V (20/25K)
Start-up voltage: 140 V (5–10K) · 250 V (12–25K)
MPPT voltage range: 120–850 V (5–10K) · 200–850 V (12/15K) · 200–1000 V (20/25K)
Full-load MPPT voltage range: 350–850 V (5/6K) · 450–850 V (8–12K) · 480–850 V (15K) · 500–850 V (20K) · 550–850 V (25K)
Rated PV input voltage: 600 V
Max. operating PV input current: 13+13 A (5–12K) · 13+26 A (15K) · 26+26 A (20/25K)
Max. input short-circuit current: 19.5+19.5 A (5–12K) · 19.5+39 A (15K) · 39+39 A (20/25K)
No. of MPP trackers / strings: 2 / (1+1) (5–12K) · 2 / (1+2) (15K) · 2 / (2+2) (20/25K)
Max. inverter backfeed current to the array: 0 A
PV connector: VP-D4

AC output

Rated AC output active power: 5 / 6 / 8 / 10 / 12 / 15 / 20 / 25 kW
Max. AC output apparent power: 5 / 6 / 8 / 10 / 12 / 15 / 20 / 25 kVA
Rated = max. AC output current: 7.2 / 8.7 / 11.6 / 14.5 / 17.4 / 21.7 / 29 / 36.2 A
Output voltage / range: 230/400 V · 240/415 V, 0.85Un–1.1Un
Grid frequency / range: 50 Hz (45–55 Hz)
Grid connection: 3L + N + PE
Power factor adjustment range: 0.8 leading to 0.8 lagging
THDi: <3%
DC injection current: <0.5% In

Efficiency

Max. efficiency: 98.2% (5/6K) · 98.3% (8–12K) · 98.5% (15–25K)
Euro efficiency: 97.6% (5/6K) · 97.8% (8–12K) · 98.0% (15–25K)
MPPT efficiency: >99%

Protection

Built-in protection: DC reverse polarity, AC over-current, over-voltage and short-circuit, thermal, insulation impedance, DC component and residual current monitoring
Anti-islanding: Yes (active frequency shift)
DC switch: Integrated
Arc-fault circuit interrupter (AFCI): Optional
Surge protection: Type II (DC), Type II (AC)
Protection class / overvoltage category: Class I · OVC II (DC), OVC III (AC)

General

Operating temperature: −25 to +65 °C (5–15K) · −25 to +60 °C (20/25K); derating above 45 °C
Permissible humidity: 0–100%
Permissible altitude: 4000 m
Noise: ≤30 dB(A) (5–12K) · ≤40 dB(A) (15K) · ≤50 dB (20/25K)
Protection degree: IP65
Topology: Non-isolated (transformerless)
Cooling: Natural (5–12K) · intelligent air cooling (15–25K)
Dimensions (W×H×D): 332 × 457 × 203 mm (5–12K) · 332 × 472 × 203 mm (15K) · 362 × 527 × 220 mm (20/25K), excluding connectors and brackets
Weight: 11 kg (5–12K) · 15 kg (15K) · 20 kg (20/25K)
Communication: RS485 / RS232, WiFi / LAN monitoring
Display: LCD1602 (the June 2026 25K manual prints LCD + LED)
Grid standard: AS/NZS 4777.2
Safety / EMC: IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2
Warranty: 10 years

Highlights

PV-only three-phase string inverters, 5–25 kW. For grid-tied solar with no battery input. Even the 5 and 6 kW sizes are three-phase.
Two MPP trackers on every size. Peak efficiency is 98.2–98.5% and MPPT efficiency is above 99%.
Max. PV input power is 150% of rated on every size (15 kW on the 10K). Deye’s catalogue also prints a max. PV access power of 200% of rated.
Zero export (with an external meter) and VSG (virtual synchronous generator) application are supported. String intelligent monitoring, AFCI and anti-PID are optional.
IP65 and AS/NZS 4777.2. The unit has an integrated DC switch and Type II surge protection on both DC and AC. Deye’s AU/NZ SUN series 10-year limited warranty (V2.17) covers every size. For the first five years it covers all parts and the labour Deye needs to repair the product. For the second five it covers parts only, excluding the LCD, fan, labour, taxes and duties. Neither period covers installer fees for installation, on-site inspection, removal or reinstallation.

Size comparison

5–12 kW

	5K	6K	8K	10K	12K
Rated AC power (kW)	5	6	8	10	12
Rated / max. AC current (A)	7.2	8.7	11.6	14.5	17.4
Max. PV input power (kW)	7.5	9	12	15	18
Max. PV access power (kW)	10	12	16	20	24
Max. PV input voltage (V)	1000	1000	1000	1000	1000
Start-up voltage (V)	140	140	140	140	250
MPPT range (V)	120–850	120–850	120–850	120–850	200–850
Full-load MPPT range (V)	350–850	350–850	450–850	450–850	450–850
Strings per MPPT (2 MPPTs)	1 + 1	1 + 1	1 + 1	1 + 1	1 + 1
Max. operating PV current (A)	13 + 13	13 + 13	13 + 13	13 + 13	13 + 13
Max. short-circuit current (A)	19.5 + 19.5	19.5 + 19.5	19.5 + 19.5	19.5 + 19.5	19.5 + 19.5
Max. / Euro efficiency (%)	98.2 / 97.6	98.2 / 97.6	98.3 / 97.8	98.3 / 97.8	98.3 / 97.8
W × H × D (mm)	332 × 457 × 203	332 × 457 × 203	332 × 457 × 203	332 × 457 × 203	332 × 457 × 203
Weight (kg)	11	11	11	11	11
Cooling	Natural	Natural	Natural	Natural	Natural
Noise	≤30 dB(A)	≤30 dB(A)	≤30 dB(A)	≤30 dB(A)	≤30 dB(A)

15–25 kW

	15K	20K	25K
Rated AC power (kW)	15	20	25
Rated / max. AC current (A)	21.7	29	36.2
Max. PV input power (kW)	22.5	30	37.5
Max. PV access power (kW)	30	40	50
Max. PV input voltage (V)	1000	1100	1100
Start-up voltage (V)	250	250	250
MPPT range (V)	200–850	200–1000	200–1000
Full-load MPPT range (V)	480–850	500–850	550–850
Strings per MPPT (2 MPPTs)	1 + 2	2 + 2	2 + 2
Max. operating PV current (A)	13 + 26	26 + 26	26 + 26
Max. short-circuit current (A)	19.5 + 39	39 + 39	39 + 39
Max. / Euro efficiency (%)	98.5 / 98.0	98.5 / 98.0	98.5 / 98.0
W × H × D (mm)	332 × 472 × 203	362 × 527 × 220	362 × 527 × 220
Weight (kg)	15	20	20
Cooling	Intelligent air	Intelligent air	Intelligent air
Noise	≤40 dB(A)	≤50 dB	≤50 dB

Every size shares these values: 230/400 V or 240/415 V (0.85Un–1.1Un), 3L + N + PE, 50 Hz (45–55 Hz), PF 0.8 leading to 0.8 lagging, THDi <3%, 600 V rated PV input voltage, VP-D4 PV connectors, IP65, non-isolated topology and 4000 m altitude. Full model codes take the form SUN-<rating>K-G05-AU. Max. PV input power and max. PV access power are printed as Deye labels them; none of the linked documents defines either term. AC output stays limited to the rated power on every size. Array sizing must also meet the rules that apply to the installation.

Three chassis

5–12 kW is the compact 11 kg unit with natural cooling (≤30 dB(A)). Each of its two trackers takes one string. The 12K moves to a 250 V start-up and a 200–850 V MPPT window.
15 kW has a slightly taller body (15 kg) with fan cooling. Tracker 2 takes two strings (1+2, 13+26 A).
20/25 kW is the larger 20 kg chassis. Each tracker takes two strings (26+26 A), and max. PV input is 1100 V. Its operating ceiling is +60 °C, compared with +65 °C for the smaller sizes.

Zero export

Zero export needs an external energy meter on the inverter’s RS485 port. The AU manuals support the Eastron SDM630MCT 40 mA with external CTs, which is the three-phase meter Suncloud supplies. The manuals list other supported meters, including the direct-connect Eastron SDM630-Modbus V2 (up to 100 A). For single-phase sites, see the single-phase G04 / G02P1 string inverters. The G05 has no battery port, so adding storage later needs an AC-coupled battery system or a hybrid inverter.

Where Deye’s documents disagree

20/25 kW MPPT range. The June 2026 18/20K manual prints 200–1100 V. The July 2025 18–25K datasheet, the March 2026 catalogue, the June 2026 25K manual and the SUN-18–25K-G05P3-AU-CM2 manual (Ver 2.5, June 2026) all print 200–1000 V, which this page uses. All of them print 1100 V max. PV input voltage. Check the delivered unit’s rating label and manual before you design strings above 1000 V.
20/25 kW operating temperature. The July 2025 18–25K datasheet prints −25 to +65 °C. The June 2026 manuals print −25 to +60 °C with derating above 45 °C, and the catalogue prints −25 to +60 °C. This page uses −25 to +60 °C.
25 kW display. The June 2026 25K manual and the SUN-18–25K-G05P3-AU-CM2 manual print an LCD + LED display. The July 2025 18–25K datasheet, the March 2026 catalogue and the June 2026 18/20K manual print LCD1602.
Superseded 18–25K datasheet. Deye’s May 2025 issue printed 1000 V max. PV input, a 200–850 V MPPT range and natural cooling. The July 2025 issue linked here replaces it.
12 kW PV input. The December 2025 3–12K datasheet prints 16.5 kW. The AU manual and the catalogue both print 18 kW.
6 kW current. The catalogue prints 7.8 A. The AU manual and the datasheet print 8.7 A, which matches 6 kW at 230/400 V.
December 2025 datasheet re-issues. Deye’s December 2025 datasheets for 3–12K and 15K use generic grid values (380/400 V, 50/60 Hz). The 3–12K sheet also prints one efficiency line (98.3% max., 97.5% Euro) for every size, and the 15K sheet prints natural cooling and 97.5% Euro efficiency. The AU manuals give 230/400 V · 240/415 V, 50 Hz and the per-size values above. Deye’s earlier July 2025 AU issue of the 15K datasheet printed 230/400 V · 240/415 V, 50 Hz, 98.0% Euro efficiency and intelligent air cooling, which agree with the manual.
Model suffix. Some Deye order codes and documents use -G05P3-AU for three-phase G05 units, for example the SUN-18–25K-G05P3-AU-CM2 manual. Confirm the exact model code when ordering.

Figures are from Deye’s AU installation manuals (SUN-3–12K-G05-AU, SUN-15K-G05-AU and SUN-25K-G05-AU Ver 2.3; SUN-18/20K-G05-AU Ver 1.0; all 17 June 2026). They were cross-checked against the Deye Australia catalogue (Ver 4.3, 31 March 2026, linked above; G05 data on pp. 13–18) and the linked datasheets (3–12K and 15K updated 13 December 2025; 18–25K 25 July 2025), plus Deye’s July 2025 AU issue of the 15K datasheet. The catalogue is the only source for max. PV access power, and the source for protection class I and, for 5–15 kW, the LCD1602 display, which the 3–12K and 15K manuals do not print. The warranty term is from Deye’s AU/NZ SUN series 10-year limited warranty (V2.17, July 2026): p.2 lists SUN-3–25K-G05-AU, and pp. 1 and 4 set the terms. Confirm the exact model code and ratings against the unit’s rating label before quoting or commissioning.