--- title: "Deye SUN-18K-G02 vs Fronius Verto 17.5 - Inverter Comparison | ComparePV" description: "Compare Deye SUN-18K-G02 vs Fronius Verto 17.5 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-fronius-verto-17-5" updated: 2026-01-17 --- # Deye SUN-18K-G02 vs Fronius Verto 17.5 15 differences, and they point both ways The largest is rated ac power: 0.50 kW apart. 8 of 23 comparable parameters are identical, with 9 more left out because at least one datasheet does not publish them. ## The two inverters | Attribute | A | B | | --- | --- | --- | | Inverter | [Deye SUN-18K-G02](https://comparepv.com/inverter/deye-sun-18k-g02) | [Fronius Verto 17.5](https://comparepv.com/inverter/fronius-international-fronius-verto-17-5) | | Manufacturer | Deye | Fronius International | | Rated AC power | 18 kW | 17.5 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | SUN-18K-G02 | Fronius Verto 17.5 | Difference | | --- | --- | --- | --- | | Rated AC power | 18.00 kW | 17.50 kW | 0.50 kW apart | | European efficiency | 97.8 % | 98.3 % | +0.5 pp for Fronius Verto 17.5 | | Max AC power | 19.80 kW | 17.50 kW | 2.30 kW apart | | Max PV power | 21.60 kW | 26.25 kW | 4.65 kW apart | | DC/AC ratio | 1.20 | 1.50 | +0.30 for Fronius Verto 17.5 | | MPP trackers | 2 | 4 | +2 trackers for Fronius Verto 17.5 | | Weight | 28.0 kg | 35.2 kg | -7.2 kg for SUN-18K-G02 | | Noise | 45 dB | 56 dB | -12 dB for SUN-18K-G02 | | Weight per kW | 1.6 kg/kW | 2.0 kg/kW | -0.5 kg/kW for SUN-18K-G02 | | Max AC current | 28.7 A | 26.5 A | 2.2 A apart | | Start voltage | 250 V | 150 V | -100 V for Fronius Verto 17.5 | | Max operating temperature | 65 °C | 60 °C | +5 °C for SUN-18K-G02 | | Ingress protection | IP65 | IP66 | IP65 vs IP66 | | MPPT voltage range | 200-850 V | 150-870 V | 200-850 V vs 150-870 V | | Dimensions | 520x400x240 mm | 730x540x278 mm | 520x400x240 mm vs 730x540x278 mm | ## Every compared parameter | Parameter | SUN-18K-G02 | Fronius Verto 17.5 | | --- | --- | --- | | Rated AC power | 18.00 kW | 17.50 kW | | Max AC power | 19.80 kW | 17.50 kW | | Grid connection | 3-phase | 3-phase | | Nominal AC voltage | 400 V | 400 V | | Max AC current | 28.7 A | 26.5 A | | Max PV power | 21.60 kW | 26.25 kW | | DC/AC ratio | 1.20 | 1.50 | | Max DC voltage | 1000 V | 1000 V | | MPPT voltage range | 200-850 V | 150-870 V | | Start voltage | 250 V | 150 V | | MPP trackers | 2 | 4 | | Strings per tracker | - | 2 | | Max input current per tracker | - | 28.0 A | | European efficiency | 97.8 % | 98.3 % | | Max efficiency | 98.6 % | 98.5 % | | CEC efficiency | - | - | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 28.0 kg | 35.2 kg | | Weight per kW | 1.6 kg/kW | 2.0 kg/kW | | Dimensions | 520x400x240 mm | 730x540x278 mm | | Ingress protection | IP65 | IP66 | | Cooling | forced-air | forced-air | | Noise | 45 dB | 56 dB | | Max operating temperature | 65 °C | 60 °C | | Wi-Fi | Yes | Yes | | Ethernet | Yes | Yes | | Arc fault protection | - | Yes | | Integrated DC switch | Yes | Yes | | Warranty | - | - | ## Related comparisons - [Deye SUN-18K-G02 vs Fronius International Symo Advanced 17.5-3-M](https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-symo-advanced-17-5-3-m) - 14 differences, the largest is rated ac power - [Deye SUN-18K-G02 vs Fronius Symo 17.5-3 480](https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-fronius-symo-17-5-3-480) - 10 differences, the largest is rated ac power - [Deye SUN-18K-G02 vs SolarEdge SE17.3KUS](https://comparepv.com/compare-inverters/deye-sun-18k-g02/solaredge-se17-3kus) - 14 differences, the largest is rated ac power - [Fronius Verto 17.5 vs Growatt MID 17KTL3-X](https://comparepv.com/compare-inverters/fronius-international-fronius-verto-17-5/growatt-mid-17ktl3-x) - 14 differences, the largest is rated ac power --- Source: https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-fronius-verto-17-5 Not in this file, on the page: a written summary generated on request.