--- title: "GoodWe GW33K-SDT-CN-G40 vs Sungrow SG33CX-P2 - Inverter Comparison | ComparePV" description: "Compare GoodWe GW33K-SDT-CN-G40 vs Sungrow SG33CX-P2 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/goodwe-gw33k-sdt-cn-g40/sungrow-sg33cx-p2" updated: 2026-01-16 --- # GoodWe GW33K-SDT-CN-G40 vs Sungrow SG33CX-P2 10 differences, and they point both ways The largest is max input current per tracker: 9.0 A more headroom. 9 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 GW33K-SDT-CN-G40](https://comparepv.com/inverter/goodwe-gw33k-sdt-cn-g40) | [Sungrow SG33CX-P2](https://comparepv.com/inverter/sungrow-sg33cx-p2) | | Manufacturer | GoodWe | Sungrow | | Rated AC power | 33 kW | 33 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | GW33K-SDT-CN-G40 | SG33CX-P2 | Difference | | --- | --- | --- | --- | | Max input current per tracker | 21.0 A | 30.0 A | +9.0 A for SG33CX-P2 | | Max AC power | 36.30 kW | 33.00 kW | 3.30 kW apart | | Weight | 19.0 kg | 38.0 kg | -19.0 kg for GW33K-SDT-CN-G40 | | Weight per kW | 0.6 kg/kW | 1.2 kg/kW | -0.6 kg/kW for GW33K-SDT-CN-G40 | | Nominal AC voltage | 380 V | 400 V | 20 V apart | | Start voltage | 160 V | 200 V | -40 V for GW33K-SDT-CN-G40 | | MPP trackers | 2 | 3 | +1 trackers for SG33CX-P2 | | Max efficiency | 98.7 % | 98.5 % | +0.2 pp for GW33K-SDT-CN-G40 | | MPPT voltage range | 140-1000 V | 160-1000 V | 140-1000 V vs 160-1000 V | | Dimensions | 413x530x211 mm | 575x645x245 mm | 413x530x211 mm vs 575x645x245 mm | ## Every compared parameter | Parameter | GW33K-SDT-CN-G40 | SG33CX-P2 | | --- | --- | --- | | Rated AC power | 33.00 kW | 33.00 kW | | Max AC power | 36.30 kW | 33.00 kW | | Grid connection | 3-phase | 3-phase | | Nominal AC voltage | 380 V | 400 V | | Max AC current | 55.0 A | 55.2 A | | Max PV power | - | 46.20 kW | | DC/AC ratio | - | 1.40 | | Max DC voltage | 1100 V | 1100 V | | MPPT voltage range | 140-1000 V | 160-1000 V | | Start voltage | 160 V | 200 V | | MPP trackers | 2 | 3 | | Strings per tracker | 2 | 2 | | Max input current per tracker | 21.0 A | 30.0 A | | European efficiency | - | 98.3 % | | Max efficiency | 98.7 % | 98.5 % | | CEC efficiency | - | - | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 19.0 kg | 38.0 kg | | Weight per kW | 0.6 kg/kW | 1.2 kg/kW | | Dimensions | 413x530x211 mm | 575x645x245 mm | | Ingress protection | IP66 | IP66 | | Cooling | forced-air | forced-air | | Noise | 45 dB | - | | Max operating temperature | 60 °C | 60 °C | | Wi-Fi | - | - | | Ethernet | - | - | | Arc fault protection | - | Yes | | Integrated DC switch | Yes | Yes | | Warranty | - | - | ## Related comparisons - [GoodWe GW33K-SDT-CN-G40 vs Growatt MID 33KTL3-X](https://comparepv.com/compare-inverters/goodwe-gw33k-sdt-cn-g40/growatt-mid-33ktl3-x) - 9 differences, the largest is max input current per tracker - [GoodWe GW33K-SDT-CN-G40 vs Sungrow SG33CX](https://comparepv.com/compare-inverters/goodwe-gw33k-sdt-cn-g40/sungrow-sg33cx) - 7 differences, the largest is max input current per tracker - [GoodWe GW33K-SDT-CN-G40 vs Sungrow SG33T-P2-CN](https://comparepv.com/compare-inverters/goodwe-gw33k-sdt-cn-g40/sungrow-sg33t-p2-cn) - 8 differences, the largest is max input current per tracker - [Sungrow SG33CX-P2 vs SOFAR 33KTLX-G3](https://comparepv.com/compare-inverters/sungrow-sg33cx-p2/sofar-solar-sofar-33ktlx-g3) - 7 differences, the largest is max input current per tracker --- Source: https://comparepv.com/compare-inverters/goodwe-gw33k-sdt-cn-g40/sungrow-sg33cx-p2 Not in this file, on the page: a written summary generated on request.