--- title: "Growatt MID 30KTL3-X vs SMA Solar STP 30-US-50 (Sunny Tripower X-US 30) - Inverter Comparison | ComparePV" description: "Compare Growatt MID 30KTL3-X vs SMA Solar STP 30-US-50 (Sunny Tripower X-US 30) side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/growatt-mid-30ktl3-x/sma-solar-stp-30-us-50-sunny-tripower-x-us-30" updated: 2026-01-16 --- # Growatt MID 30KTL3-X vs SMA Solar STP 30-US-50 (Sunny Tripower X-US 30) 11 differences, and they point both ways The largest is warranty: 5 yrs longer. 12 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 | [Growatt MID 30KTL3-X](https://comparepv.com/inverter/growatt-mid-30ktl3-x) | [SMA Solar STP 30-US-50 (Sunny Tripower X-US 30)](https://comparepv.com/inverter/sma-solar-stp-30-us-50-sunny-tripower-x-us-30) | | Manufacturer | Growatt | SMA Solar | | Rated AC power | 30 kW | 30 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | MID 30KTL3-X | STP 30-US-50 (Sunny Tripower X-US 30) | Difference | | --- | --- | --- | --- | | Warranty | 5 yrs | 10 yrs | +5 yrs for STP 30-US-50 (Sunny Tripower X-US 30) | | Max DC voltage | 1100 V | 1000 V | 100 V apart | | Max input current per tracker | 26.0 A | 24.0 A | +2.0 A for MID 30KTL3-X | | Max AC power | 33.30 kW | 30.00 kW | 3.30 kW apart | | Weight | 29.5 kg | 35.0 kg | -5.5 kg for MID 30KTL3-X | | Nominal AC voltage | 400 V | 480 V | 80 V apart | | Max AC current | 50.5 A | 36.0 A | 14.5 A apart | | Start voltage | 250 V | 188 V | -62 V for STP 30-US-50 (Sunny Tripower X-US 30) | | Ingress protection | IP66 | Type 4X (UL 50E) | IP66 vs Type 4X (UL 50E) | | MPPT voltage range | 200-1000 V | 150-1000 V | 200-1000 V vs 150-1000 V | | Dimensions | 435x580x230 mm | 762x728x266 mm | 435x580x230 mm vs 762x728x266 mm | ## Every compared parameter | Parameter | MID 30KTL3-X | STP 30-US-50 (Sunny Tripower X-US 30) | | --- | --- | --- | | Rated AC power | 30.00 kW | 30.00 kW | | Max AC power | 33.30 kW | 30.00 kW | | Grid connection | 3-phase | 3-phase | | Nominal AC voltage | 400 V | 480 V | | Max AC current | 50.5 A | 36.0 A | | Max PV power | 45.00 kW | 45.00 kW | | DC/AC ratio | 1.50 | 1.50 | | Max DC voltage | 1100 V | 1000 V | | MPPT voltage range | 200-1000 V | 150-1000 V | | Start voltage | 250 V | 188 V | | MPP trackers | - | 3 | | Strings per tracker | 2 | 2 | | Max input current per tracker | 26.0 A | 24.0 A | | European efficiency | 98.5 % | - | | Max efficiency | 98.8 % | - | | CEC efficiency | - | 98.0 % | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 29.5 kg | 35.0 kg | | Weight per kW | 1.0 kg/kW | 1.2 kg/kW | | Dimensions | 435x580x230 mm | 762x728x266 mm | | Ingress protection | IP66 | Type 4X (UL 50E) | | Cooling | forced-air | forced-air | | Noise | - | 59 dB | | Max operating temperature | 60 °C | 60 °C | | Wi-Fi | Yes | Yes | | Ethernet | Yes | Yes | | Arc fault protection | Yes | Yes | | Integrated DC switch | Yes | Yes | | Warranty | 5 yrs | 10 yrs | ## Related comparisons - [Growatt MID 30KTL3-X vs Growatt MID 30KTL3-X2 (Pro.E)](https://comparepv.com/compare-inverters/growatt-mid-30ktl3-x/growatt-mid-30ktl3-x2-pro-e) - 5 differences, the largest is max input current per tracker - [Growatt MID 30KTL3-X vs Growatt MID 30KTL3-X2-1](https://comparepv.com/compare-inverters/growatt-mid-30ktl3-x/growatt-mid-30ktl3-x2-1) - 5 differences, the largest is max input current per tracker - [Growatt MID 30KTL3-X vs GoodWe GW30K-MT](https://comparepv.com/compare-inverters/growatt-mid-30ktl3-x/goodwe-gw30k-mt) - 9 differences, the largest is max input current per tracker --- Source: https://comparepv.com/compare-inverters/growatt-mid-30ktl3-x/sma-solar-stp-30-us-50-sunny-tripower-x-us-30 Not in this file, on the page: a written summary generated on request.