Skip to main content
MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) 5 of 13 identical Swap Change inverters

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

Growatt MAC 66KTL3-X MV
Growatt
MAC 66KTL3-X MV
66 kW Grid-tie
Open inverter page Datasheet PDF
VS
SolarEdge SE66.6K (K66.6SE)
SolarEdge
SolarEdge SE66.6K (K66.6SE)
66.6 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

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.

See all 8 differences
How alike are they
5 of 13 comparable
parameters are identical
identical differs not published
01

What actually differs

8 of 13 parameters
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 more efficient
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 more oversizing headroom
Dimensions 508x680x281 mm 540x315x260 mm 508x680x281 mm vs 540x315x260 mm
02

Full specification

Parameter MAC 66KTL3-X MV SolarEdge SE66.6K (K66.6SE) Difference
AC output
Rated AC power 66.00 kW 66.60 kW 0.60 kW apart
Max AC power 73.30 kW 66.60 kW 6.70 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage - 480 V Not published by Growatt
Max AC current 88.2 A 80.0 A 8.2 A apart
PV input
Max PV power 85.80 kW 90.00 kW 4.20 kW apart
DC/AC ratio 1.30 1.35 +0.05 for SolarEdge SE66.6K (K66.6SE)
Max DC voltage 1100 V 1000 V 100 V apart
MPPT voltage range 200-1000 V - Not published by SolarEdge
Start voltage 250 V - Not published by SolarEdge
MPP trackers 3 - Not published by SolarEdge
Strings per tracker 4 - Not published by SolarEdge
Max input current per tracker 13.0 A - Not published by SolarEdge
Efficiency
European efficiency - 98.0 % Not published by Growatt
Max efficiency 98.8 % 98.1 % +0.7 pp for MAC 66KTL3-X MV
CEC efficiency - - Neither datasheet publishes this
Battery
Battery input - - Neither datasheet publishes this
Battery voltage - - Neither datasheet publishes this
Max charge current - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 52.0 kg - Not published by SolarEdge
Weight per kW 0.8 kg/kW - Not published by SolarEdge
Dimensions 508x680x281 mm 540x315x260 mm 508x680x281 mm vs 540x315x260 mm
Ingress protection IP65 IP65 Same
Cooling forced-air forced-air Same
Noise - 60 dB Not published by Growatt
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi Yes - Not published by SolarEdge
Ethernet - Yes Not published by Growatt
Arc fault protection - Yes Not published by Growatt
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs - Not published by SolarEdge
03

More useful comparisons

Open all inverters
Same type, similar size
SolarEdge
Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) - Primary unit
9 differences, the largest is rated ac power
Same type, similar size
SolarEdge
Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (K66.6SE) - Secondary unit
9 differences, the largest is rated ac power
Same type, similar size
SolarEdge
Growatt MAC 66KTL3-X MV vs SolarEdge SE66.6K (Synergy, 277/480V)
10 differences, the largest is rated ac power
Same type, similar size
SolarEdge
SolarEdge SE66.6K (K66.6SE) vs SolarEdge SE66.6K (Synergy) - secondary unit (physical)
The same specification on paper
04

Written summary

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.