---
title: "Growatt MID 15KTL3-X vs SMA Solar STP 15-50 (Sunny Tripower X 15) - Inverter Comparison | ComparePV"
description: "Compare Growatt MID 15KTL3-X vs SMA Solar STP 15-50 (Sunny Tripower X 15) side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/growatt-mid-15ktl3-x/sma-solar-stp-15-50-sunny-tripower-x-15"
updated: 2026-01-16
---

# Growatt MID 15KTL3-X vs SMA Solar STP 15-50 (Sunny Tripower X 15)

MID 15KTL3-X leads on the differences that matter

The largest is european efficiency: 0.8 pp more efficient. 11 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 15KTL3-X](https://comparepv.com/inverter/growatt-mid-15ktl3-x) | [SMA Solar STP 15-50 (Sunny Tripower X 15)](https://comparepv.com/inverter/sma-solar-stp-15-50-sunny-tripower-x-15) |
| Manufacturer | Growatt | SMA Solar |
| Rated AC power | 15 kW | 15 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

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


| Parameter | MID 15KTL3-X | STP 15-50 (Sunny Tripower X 15) | Difference |
| --- | --- | --- | --- |
| European efficiency | 98.6 % | 97.8 % | +0.8 pp for MID 15KTL3-X |
| Max DC voltage | 1100 V | 1000 V | 100 V apart |
| Max efficiency | 98.8 % | 98.2 % | +0.5 pp for MID 15KTL3-X |
| Max AC power | 16.60 kW | 15.00 kW | 1.60 kW apart |
| Weight | 23.0 kg | 35.0 kg | -12.0 kg for MID 15KTL3-X |
| Weight per kW | 1.5 kg/kW | 2.3 kg/kW | -0.8 kg/kW for MID 15KTL3-X |
| Nominal AC voltage | 400 V | 230 V | 170 V apart |
| Start voltage | 250 V | 188 V | -62 V for STP 15-50 (Sunny Tripower X 15) |
| MPP trackers | 2 | 3 | +1 trackers for STP 15-50 (Sunny Tripower X 15) |
| MPPT voltage range | 200-1000 V | 150-1000 V | 200-1000 V vs 150-1000 V |
| Max AC current | 24.2 A | 25.0 A | 0.8 A apart |
| Dimensions | 395x525x222 mm | 762x728x266 mm | 395x525x222 mm vs 762x728x266 mm |


## Every compared parameter


| Parameter | MID 15KTL3-X | STP 15-50 (Sunny Tripower X 15) |
| --- | --- | --- |
| Rated AC power | 15.00 kW | 15.00 kW |
| Max AC power | 16.60 kW | 15.00 kW |
| Grid connection | 3-phase | 3-phase |
| Nominal AC voltage | 400 V | 230 V |
| Max AC current | 24.2 A | 25.0 A |
| Max PV power | 22.50 kW | 22.50 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 | 2 | 3 |
| Strings per tracker | - | 2 |
| Max input current per tracker | - | 24.0 A |
| European efficiency | 98.6 % | 97.8 % |
| Max efficiency | 98.8 % | 98.2 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 23.0 kg | 35.0 kg |
| Weight per kW | 1.5 kg/kW | 2.3 kg/kW |
| Dimensions | 395x525x222 mm | 762x728x266 mm |
| Ingress protection | IP65 | IP65 |
| 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 |
| Integrated DC switch | Yes | Yes |
| Warranty | 5 yrs | 5 yrs |


## Related comparisons

- [Growatt MID 15KTL3-X vs Sungrow SG15KTL-M](https://comparepv.com/compare-inverters/growatt-mid-15ktl3-x/sungrow-sg15ktl-m) - 4 differences, the largest is max ac power
- [Growatt MID 15KTL3-X vs Huawei SUN2000-15KTL-M2](https://comparepv.com/compare-inverters/growatt-mid-15ktl3-x/huawei-sun2000-15ktl-m2) - 9 differences, the largest is weight
- [Growatt MID 15KTL3-X vs Huawei SUN2000-15KTL-M0](https://comparepv.com/compare-inverters/growatt-mid-15ktl3-x/huawei-sun2000-15ktl-m0) - 9 differences, the largest is weight


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Source: https://comparepv.com/compare-inverters/growatt-mid-15ktl3-x/sma-solar-stp-15-50-sunny-tripower-x-15

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