---
title: "GoodWe GW17K-SDT-CN-G40 vs Sungrow SG17RT-20 - Inverter Comparison | ComparePV"
description: "Compare GoodWe GW17K-SDT-CN-G40 vs Sungrow SG17RT-20 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/goodwe-gw17k-sdt-cn-g40/sungrow-sg17rt-20"
updated: 2026-01-16
---

# GoodWe GW17K-SDT-CN-G40 vs Sungrow SG17RT-20

9 differences, and they point both ways

The largest is max input current per tracker: 4.0 A more headroom. 10 of 19 comparable parameters are identical, with 13 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [GoodWe GW17K-SDT-CN-G40](https://comparepv.com/inverter/goodwe-gw17k-sdt-cn-g40) | [Sungrow SG17RT-20](https://comparepv.com/inverter/sungrow-sg17rt-20) |
| Manufacturer | GoodWe | Sungrow |
| Rated AC power | 17 kW | 17 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | GW17K-SDT-CN-G40 | SG17RT-20 | Difference |
| --- | --- | --- | --- |
| Max input current per tracker | 21.0 A | 25.0 A | +4.0 A for SG17RT-20 |
| Max AC power | 18.70 kW | 17.00 kW | 1.70 kW apart |
| Weight | 17.0 kg | 20.0 kg | -3.0 kg for GW17K-SDT-CN-G40 |
| Nominal AC voltage | 380 V | 400 V | 20 V apart |
| Ingress protection | IP66 | IP65 | IP66 vs IP65 |
| MPPT voltage range | 140-1000 V | 160-1000 V | 140-1000 V vs 160-1000 V |
| Start voltage | 160 V | 180 V | -20 V for GW17K-SDT-CN-G40 |
| Strings per tracker | 2 | 1 | 1 string apart |
| Dimensions | 413x530x211 mm | 480x370x195 mm | 413x530x211 mm vs 480x370x195 mm |


## Every compared parameter


| Parameter | GW17K-SDT-CN-G40 | SG17RT-20 |
| --- | --- | --- |
| Rated AC power | 17.00 kW | 17.00 kW |
| Max AC power | 18.70 kW | 17.00 kW |
| Grid connection | 3-phase | 3-phase |
| Nominal AC voltage | 380 V | 400 V |
| Max AC current | 28.4 A | 28.3 A |
| Max PV power | - | - |
| DC/AC ratio | - | - |
| Max DC voltage | 1100 V | 1100 V |
| MPPT voltage range | 140-1000 V | 160-1000 V |
| Start voltage | 160 V | 180 V |
| MPP trackers | 2 | 2 |
| Strings per tracker | 2 | 1 |
| Max input current per tracker | 21.0 A | 25.0 A |
| European efficiency | - | 98.2 % |
| Max efficiency | 98.6 % | 98.6 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 17.0 kg | 20.0 kg |
| Weight per kW | 1.0 kg/kW | 1.2 kg/kW |
| Dimensions | 413x530x211 mm | 480x370x195 mm |
| Ingress protection | IP66 | IP65 |
| Cooling | forced-air | forced-air |
| Noise | 45 dB | - |
| Max operating temperature | 60 °C | 60 °C |
| Wi-Fi | - | - |
| Ethernet | - | - |
| Arc fault protection | - | - |
| Integrated DC switch | Yes | Yes |
| Warranty | - | - |


## Related comparisons

- [GoodWe GW17K-SDT-CN-G40 vs Growatt MID 17KTL3-X](https://comparepv.com/compare-inverters/goodwe-gw17k-sdt-cn-g40/growatt-mid-17ktl3-x) - 9 differences, the largest is weight
- [GoodWe GW17K-SDT-CN-G40 vs Huawei SUN2000-17KTL-M0](https://comparepv.com/compare-inverters/goodwe-gw17k-sdt-cn-g40/huawei-sun2000-17ktl-m0) - 10 differences, the largest is weight
- [GoodWe GW17K-SDT-CN-G40 vs Huawei SUN2000-17KTL-M2](https://comparepv.com/compare-inverters/goodwe-gw17k-sdt-cn-g40/huawei-sun2000-17ktl-m2) - 10 differences, the largest is weight
- [Sungrow SG17RT-20 vs SOFAR 17KTLX-G3](https://comparepv.com/compare-inverters/sungrow-sg17rt-20/sofar-solar-sofar-17ktlx-g3) - 6 differences, the largest is weight


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Source: https://comparepv.com/compare-inverters/goodwe-gw17k-sdt-cn-g40/sungrow-sg17rt-20

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