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(Synergy) - secondary unit (physical) vs (K66.6SE) - Primary unit 18 of 20 identical Swap Change inverters

SolarEdge SE66.6K (Synergy) - secondary unit (physical) vs SolarEdge SE66.6K (K66.6SE) - Primary unit

SolarEdge SE66.6K (Synergy) - secondary unit (physical)
SolarEdge
SolarEdge SE66.6K (Synergy) - secondary unit (physical)
66.6 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
VS
SolarEdge SE66.6K (K66.6SE) - Primary unit
SolarEdge
SolarEdge SE66.6K (K66.6SE) - Primary unit
66.6 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

(Synergy) - secondary unit (physical) leads on the differences that matter

The largest is weight: 3.0 kg lighter. 18 of 20 comparable parameters are identical, with 12 more left out because at least one datasheet does not publish them.

See all 2 differences
How alike are they
18 of 20 comparable
parameters are identical
identical differs not published
01

What actually differs

2 of 20 parameters
Parameter (Synergy) - secondary unit (physical) (K66.6SE) - Primary unit Difference
Weight 45.0 kg 48.0 kg 3.0 kg lighter
Dimensions 540x315x260 mm 940x315x260 mm 540x315x260 mm vs 940x315x260 mm
02

Full specification

Parameter (Synergy) - secondary unit (physical) (K66.6SE) - Primary unit Difference
AC output
Rated AC power 66.60 kW 66.60 kW Same
Max AC power 66.60 kW 66.60 kW Same
Grid connection 3-phase 3-phase Same
Nominal AC voltage 480 V 480 V Same
Max AC current 80.0 A 80.0 A Same
PV input
Max PV power 90.00 kW 90.00 kW Same
DC/AC ratio 1.35 1.35 Same
Max DC voltage 1000 V 1000 V Same
MPPT voltage range 680-1000 V - Not published by SolarEdge
Start voltage - - Neither datasheet publishes this
MPP trackers - - Neither datasheet publishes this
Strings per tracker - - Neither datasheet publishes this
Max input current per tracker 40.0 A - Not published by SolarEdge
Efficiency
European efficiency 98.0 % 98.0 % Same
Max efficiency 98.1 % 98.1 % Same
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 48.0 kg -3.0 kg for (Synergy) - secondary unit (physical)
Weight per kW 0.7 kg/kW 0.7 kg/kW Same
Dimensions 540x315x260 mm 940x315x260 mm 540x315x260 mm vs 940x315x260 mm
Ingress protection IP65 IP65 Same
Cooling forced-air forced-air Same
Noise 60 dB 60 dB Same
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi - - Neither datasheet publishes this
Ethernet Yes Yes Same
Arc fault protection Yes Yes Same
Integrated DC switch Yes Yes Same
Warranty
Warranty - - Neither datasheet publishes this
03

More useful comparisons

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SolarEdge SE66.6K (Synergy) - secondary unit (physical) vs SolarEdge SE66.6K (K66.6SE)
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SolarEdge SE66.6K (Synergy) - secondary unit (physical) vs SolarEdge SE66.6K (K66.6SE) - Secondary unit
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Same type, similar size
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SolarEdge SE66.6K (Synergy) - secondary unit (physical) 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.