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SolarEdge SE66.6K (K66.6SE) vs SE66.6K (400V grid) 11 of 17 identical Swap Change inverters

SolarEdge SE66.6K (K66.6SE) vs SolarEdge SE66.6K (400V grid)

SolarEdge SE66.6K (K66.6SE)
SolarEdge
SolarEdge SE66.6K (K66.6SE)
66.6 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
VS
SolarEdge SE66.6K (400V grid)
SolarEdge
SE66.6K (400V grid)
66.6 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SE66.6K (400V grid) leads on the differences that matter

The largest is max pv power: 26.55 kW apart. 11 of 17 comparable parameters are identical, with 15 more left out because at least one datasheet does not publish them.

See all 6 differences
How alike are they
11 of 17 comparable
parameters are identical
identical differs not published
01

What actually differs

6 of 17 parameters
Parameter SolarEdge SE66.6K (K66.6SE) SE66.6K (400V grid) Difference
Max PV power 90.00 kW 116.55 kW 26.55 kW apart
DC/AC ratio 1.35 1.75 0.40 more oversizing headroom
Noise 60 dB 67 dB 7 dB quieter
Nominal AC voltage 480 V 400 V 80 V apart
Max AC current 80.0 A 96.5 A 16.5 A apart
Max efficiency 98.1 % 98.3 % 0.2 pp more efficient
02

Full specification

Parameter SolarEdge SE66.6K (K66.6SE) SE66.6K (400V grid) 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 400 V 80 V apart
Max AC current 80.0 A 96.5 A 16.5 A apart
PV input
Max PV power 90.00 kW 116.55 kW 26.55 kW apart
DC/AC ratio 1.35 1.75 +0.40 for SE66.6K (400V grid)
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 - - Neither datasheet publishes this
Efficiency
European efficiency 98.0 % 98.0 % Same
Max efficiency 98.1 % 98.3 % +0.2 pp for SE66.6K (400V grid)
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 - - Neither datasheet publishes this
Weight per kW - - Neither datasheet publishes this
Dimensions 540x315x260 mm - Not published by SolarEdge
Ingress protection IP65 IP65 Same
Cooling forced-air forced-air Same
Noise 60 dB 67 dB -7 dB for SolarEdge SE66.6K (K66.6SE)
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi - Yes Not published by SolarEdge
Ethernet Yes Yes Same
Arc fault protection Yes Yes Same
Integrated DC switch Yes Yes Same
Warranty
Warranty - - Neither datasheet publishes this
03

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04

Written summary

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