---
title: "Deye SUN-18K-G02 vs Fronius Symo 17.5-3 480 - Inverter Comparison | ComparePV"
description: "Compare Deye SUN-18K-G02 vs Fronius Symo 17.5-3 480 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-symo-17-5-3-480"
updated: 2026-01-17
---

# Deye SUN-18K-G02 vs Fronius Symo 17.5-3 480

SUN-18K-G02 leads on the differences that matter

The largest is rated ac power: 0.50 kW apart. 6 of 16 comparable parameters are identical, with 16 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 Symo 17.5-3 480](https://comparepv.com/inverter/fronius-international-fronius-symo-17-5-3-480) |
| Manufacturer | Deye | Fronius International |
| Rated AC power | 18 kW | 17.495 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 Symo 17.5-3 480 | Difference |
| --- | --- | --- | --- |
| Rated AC power | 18.00 kW | 17.50 kW | 0.50 kW apart |
| Max efficiency | 98.6 % | 98.0 % | +0.6 pp for SUN-18K-G02 |
| Max AC power | 19.80 kW | 17.50 kW | 2.30 kW apart |
| Weight | 28.0 kg | 43.4 kg | -15.4 kg for SUN-18K-G02 |
| Weight per kW | 1.6 kg/kW | 2.5 kg/kW | -0.9 kg/kW for SUN-18K-G02 |
| Max AC current | 28.7 A | 21.0 A | 7.7 A apart |
| Start voltage | 250 V | 200 V | -50 V for Fronius Symo 17.5-3 480 |
| Max operating temperature | 65 °C | 60 °C | +5 °C for SUN-18K-G02 |
| Ingress protection | IP65 | NEMA 4X | IP65 vs NEMA 4X |
| Dimensions | 520x400x240 mm | 724x511x226 mm | 520x400x240 mm vs 724x511x226 mm |


## Every compared parameter


| Parameter | SUN-18K-G02 | Fronius Symo 17.5-3 480 |
| --- | --- | --- |
| 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 | - |
| Max AC current | 28.7 A | 21.0 A |
| Max PV power | 21.60 kW | - |
| DC/AC ratio | 1.20 | - |
| Max DC voltage | 1000 V | 1000 V |
| MPPT voltage range | 200-850 V | - |
| Start voltage | 250 V | 200 V |
| MPP trackers | 2 | - |
| Strings per tracker | - | - |
| Max input current per tracker | - | - |
| European efficiency | 97.8 % | - |
| Max efficiency | 98.6 % | 98.0 % |
| CEC efficiency | - | 97.5 % |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 28.0 kg | 43.4 kg |
| Weight per kW | 1.6 kg/kW | 2.5 kg/kW |
| Dimensions | 520x400x240 mm | 724x511x226 mm |
| Ingress protection | IP65 | NEMA 4X |
| Cooling | forced-air | forced-air |
| Noise | 45 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 | - | 10 yrs |


## Related comparisons

- [Deye SUN-18K-G02 vs Fronius Verto 17.5](https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-fronius-verto-17-5) - 15 differences, the largest is rated ac power
- [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 SolarEdge SE17.3KUS](https://comparepv.com/compare-inverters/deye-sun-18k-g02/solaredge-se17-3kus) - 14 differences, the largest is rated ac power
- [Fronius Symo 17.5-3 480 vs Growatt MID 17KTL3-X](https://comparepv.com/compare-inverters/fronius-international-fronius-symo-17-5-3-480/growatt-mid-17ktl3-x) - 11 differences, the largest is rated ac power


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Source: https://comparepv.com/compare-inverters/deye-sun-18k-g02/fronius-international-fronius-symo-17-5-3-480

Not in this file, on the page: a written summary generated on request.