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SolarEdge SE66.6K (K66.6SE) - Secondary unit vs MAC 66KTL3-X MV 6 of 15 identical Swap Change inverters

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

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

9 differences, and they point both ways

The largest is rated ac power: 0.60 kW apart. 6 of 15 comparable parameters are identical, with 17 more left out because at least one datasheet does not publish them.

See all 9 differences
How alike are they
6 of 15 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 15 parameters
Parameter SolarEdge SE66.6K (K66.6SE) - Secondary unit MAC 66KTL3-X MV Difference
Rated AC power 66.60 kW 66.00 kW 0.60 kW apart
Max DC voltage 1000 V 1100 V 100 V apart
Max efficiency 98.1 % 98.8 % 0.7 pp more efficient
Max AC power 66.60 kW 73.30 kW 6.70 kW apart
Max PV power 90.00 kW 85.80 kW 4.20 kW apart
Weight 45.0 kg 52.0 kg 7.0 kg lighter
Max AC current 80.0 A 88.2 A 8.2 A apart
DC/AC ratio 1.35 1.30 0.05 more oversizing headroom
Dimensions 540x315x260 mm 508x680x281 mm 540x315x260 mm vs 508x680x281 mm
02

Full specification

Parameter SolarEdge SE66.6K (K66.6SE) - Secondary unit MAC 66KTL3-X MV Difference
AC output
Rated AC power 66.60 kW 66.00 kW 0.60 kW apart
Max AC power 66.60 kW 73.30 kW 6.70 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage 480 V - Not published by Growatt
Max AC current 80.0 A 88.2 A 8.2 A apart
PV input
Max PV power 90.00 kW 85.80 kW 4.20 kW apart
DC/AC ratio 1.35 1.30 +0.05 for SolarEdge SE66.6K (K66.6SE) - Secondary unit
Max DC voltage 1000 V 1100 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 98.1 % 98.8 % +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 45.0 kg 52.0 kg -7.0 kg for SolarEdge SE66.6K (K66.6SE) - Secondary unit
Weight per kW 0.7 kg/kW 0.8 kg/kW Effectively the same
Dimensions 540x315x260 mm 508x680x281 mm 540x315x260 mm vs 508x680x281 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

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SolarEdge SE66.6K (K66.6SE) - Secondary unit vs SolarEdge SE66.6K (K66.6SE)
The same specification on paper
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SolarEdge SE66.6K (K66.6SE) - Secondary unit vs SolarEdge SE66.6K (K66.6SE) - Primary unit
2 differences, the largest is weight
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SolarEdge
SolarEdge SE66.6K (K66.6SE) - Secondary unit vs SolarEdge SE66.6K (Synergy, 277/480V)
One difference: dimensions
04

Written summary

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