---
title: "Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) - Inverter Comparison | ComparePV"
description: "Compare Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/growatt-mac-66ktl3-x-mv/solaredge-solaredge-se66-6k-k66-6se"
updated: 2026-01-16
---

# Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE)

MAC 66KTL3-X MV leads on the differences that matter

The largest is rated ac power: 0.60 kW apart. 5 of 13 comparable parameters are identical, with 19 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Growatt MAC 66KTL3-X MV](https://comparepv.com/inverter/growatt-mac-66ktl3-x-mv) | [SolarEdge SE66.6K (K66.6SE)](https://comparepv.com/inverter/solaredge-solaredge-se66-6k-k66-6se) |
| Manufacturer | Growatt | SolarEdge |
| Rated AC power | 66 kW | 66.6 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

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


| Parameter | MAC 66KTL3-X MV | SolarEdge SE66.6K (K66.6SE) | Difference |
| --- | --- | --- | --- |
| Rated AC power | 66.00 kW | 66.60 kW | 0.60 kW apart |
| Max DC voltage | 1100 V | 1000 V | 100 V apart |
| Max efficiency | 98.8 % | 98.1 % | +0.7 pp for MAC 66KTL3-X MV |
| Max AC power | 73.30 kW | 66.60 kW | 6.70 kW apart |
| Max PV power | 85.80 kW | 90.00 kW | 4.20 kW apart |
| Max AC current | 88.2 A | 80.0 A | 8.2 A apart |
| DC/AC ratio | 1.30 | 1.35 | +0.05 for SolarEdge SE66.6K (K66.6SE) |
| Dimensions | 508x680x281 mm | 540x315x260 mm | 508x680x281 mm vs 540x315x260 mm |


## Every compared parameter


| Parameter | MAC 66KTL3-X MV | SolarEdge SE66.6K (K66.6SE) |
| --- | --- | --- |
| Rated AC power | 66.00 kW | 66.60 kW |
| Max AC power | 73.30 kW | 66.60 kW |
| Grid connection | 3-phase | 3-phase |
| Nominal AC voltage | - | 480 V |
| Max AC current | 88.2 A | 80.0 A |
| Max PV power | 85.80 kW | 90.00 kW |
| DC/AC ratio | 1.30 | 1.35 |
| Max DC voltage | 1100 V | 1000 V |
| MPPT voltage range | 200-1000 V | - |
| Start voltage | 250 V | - |
| MPP trackers | 3 | - |
| Strings per tracker | 4 | - |
| Max input current per tracker | 13.0 A | - |
| European efficiency | - | 98.0 % |
| Max efficiency | 98.8 % | 98.1 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 52.0 kg | - |
| Weight per kW | 0.8 kg/kW | - |
| Dimensions | 508x680x281 mm | 540x315x260 mm |
| Ingress protection | IP65 | IP65 |
| Cooling | forced-air | forced-air |
| Noise | - | 60 dB |
| Max operating temperature | 60 °C | 60 °C |
| Wi-Fi | Yes | - |
| Ethernet | - | Yes |
| Arc fault protection | - | Yes |
| Integrated DC switch | Yes | Yes |
| Warranty | 5 yrs | - |


## Related comparisons

- [Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) - Primary unit](https://comparepv.com/compare-inverters/growatt-mac-66ktl3-x-mv/solaredge-solaredge-se66-6k-k66-6se-primary-unit) - 9 differences, the largest is rated ac power
- [Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) - Secondary unit](https://comparepv.com/compare-inverters/growatt-mac-66ktl3-x-mv/solaredge-solaredge-se66-6k-k66-6se-secondary-unit) - 9 differences, the largest is rated ac power
- [Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (Synergy, 277/480V)](https://comparepv.com/compare-inverters/growatt-mac-66ktl3-x-mv/solaredge-solaredge-se66-6k-synergy-277-480v) - 10 differences, the largest is rated ac power
- [SolarEdge SE66.6K (K66.6SE) vs SolarEdge SE66.6K (Synergy) - secondary unit (physical)](https://comparepv.com/compare-inverters/solaredge-solaredge-se66-6k-k66-6se/solaredge-solaredge-se66-6k-synergy-secondary-unit-physical) - The same specification on paper


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Source: https://comparepv.com/compare-inverters/growatt-mac-66ktl3-x-mv/solaredge-solaredge-se66-6k-k66-6se

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