---
title: "Growatt MID 40K-HU vs Growatt WIT 40K-A-US L2 / WIT 40K-AU-US L2 - Inverter Comparison | ComparePV"
description: "Compare Growatt MID 40K-HU vs Growatt WIT 40K-A-US L2 / WIT 40K-AU-US L2 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/growatt-mid-40k-hu/growatt-wit-40k-a-us-l2-wit-40k-au-us-l2"
updated: 2026-01-16
---

# Growatt MID 40K-HU vs Growatt WIT 40K-A-US L2 / WIT 40K-AU-US L2

MID 40K-HU leads on the differences that matter

The largest is max efficiency: 0.6 pp more efficient. 4 of 12 comparable parameters are identical, with 20 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Growatt MID 40K-HU](https://comparepv.com/inverter/growatt-mid-40k-hu) | [Growatt WIT 40K-A-US L2 / WIT 40K-AU-US L2](https://comparepv.com/inverter/growatt-wit-40k-a-us-l2-wit-40k-au-us-l2) |
| Manufacturer | Growatt | Growatt |
| Rated AC power | 40 kW | 40 kW |
| Type | Hybrid | Hybrid |


## Where they differ

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


| Parameter | MID 40K-HU | WIT 40K-A-US L2 / WIT 40K-AU-US L2 | Difference |
| --- | --- | --- | --- |
| Max efficiency | 98.6 % | 98.0 % | +0.6 pp for MID 40K-HU |
| Max AC power | 40.00 kW | 44.00 kW | 4.00 kW apart |
| Weight | 48.0 kg | 120.0 kg | -72.0 kg for MID 40K-HU |
| Weight per kW | 1.2 kg/kW | 3.0 kg/kW | -1.8 kg/kW for MID 40K-HU |
| Max AC current | 66.7 A | 122.2 A | 55.5 A apart |
| Ingress protection | IP66 | IP66/NEMA 4X | IP66 vs IP66/NEMA 4X |
| Battery voltage | 600-980 V | 380~450V | 600-980 V vs 380~450V |
| Dimensions | 570x680x256 mm | 820x1350x501 mm | 570x680x256 mm vs 820x1350x501 mm |


## Every compared parameter


| Parameter | MID 40K-HU | WIT 40K-A-US L2 / WIT 40K-AU-US L2 |
| --- | --- | --- |
| Rated AC power | 40.00 kW | 40.00 kW |
| Max AC power | 40.00 kW | 44.00 kW |
| Grid connection | 3-phase | 3-phase |
| Nominal AC voltage | 400 V | - |
| Max AC current | 66.7 A | 122.2 A |
| Max PV power | 80.00 kW | - |
| DC/AC ratio | 2.00 | - |
| Max DC voltage | 1000 V | - |
| MPPT voltage range | 200-1000 V | - |
| Start voltage | 160 V | - |
| MPP trackers | - | - |
| Strings per tracker | 2 | - |
| Max input current per tracker | 40.0 A | - |
| European efficiency | 97.2 % | - |
| Max efficiency | 98.6 % | 98.0 % |
| CEC efficiency | - | - |
| Battery input | Yes | Yes |
| Battery voltage | 600-980 V | 380~450V |
| Max charge current | 42 A | - |
| Backup power | 30.0 kW | - |
| Weight | 48.0 kg | 120.0 kg |
| Weight per kW | 1.2 kg/kW | 3.0 kg/kW |
| Dimensions | 570x680x256 mm | 820x1350x501 mm |
| Ingress protection | IP66 | IP66/NEMA 4X |
| Cooling | forced-air | - |
| Noise | 55 dB | - |
| Max operating temperature | 60 °C | 60 °C |
| Wi-Fi | Yes | - |
| Ethernet | - | - |
| Arc fault protection | Yes | - |
| Integrated DC switch | Yes | - |
| Warranty | 5 yrs | - |


## Related comparisons

- [Growatt MID 40K-HU vs GoodWe GW40K-ET-10](https://comparepv.com/compare-inverters/growatt-mid-40k-hu/goodwe-gw40k-et-10) - 13 differences, the largest is european efficiency
- [Growatt MID 40K-HU vs Ginlong Solis S6-EH3P40K-H](https://comparepv.com/compare-inverters/growatt-mid-40k-hu/ginlong-solis-s6-eh3p40k-h) - 10 differences, the largest is max efficiency
- [Growatt MID 40K-HU vs Deye SUN-40K-SG01HP3-EU-BM4](https://comparepv.com/compare-inverters/growatt-mid-40k-hu/deye-sun-40k-sg01hp3-eu-bm4) - 15 differences, the largest is max input current per tracker


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Source: https://comparepv.com/compare-inverters/growatt-mid-40k-hu/growatt-wit-40k-a-us-l2-wit-40k-au-us-l2

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