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SG40CX-P2 vs SE66.6K (for 220V/230V line-to-line grids) 7 of 18 identical Swap Change inverters

Sungrow SG40CX-P2 vs SolarEdge SE66.6K (for 220V/230V line-to-line grids)

Sungrow SG40CX-P2
Sungrow
SG40CX-P2
40 kW 98.3 % euro Grid-tie
Open inverter page Datasheet PDF
VS
SolarEdge SE66.6K (for 220V/230V line-to-line grids)
SolarEdge
SE66.6K (for 220V/230V line-to-line grids)
38.45 kW 98.0 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

11 differences, and they point both ways

The largest is rated ac power: 1.55 kW apart. 7 of 18 comparable parameters are identical, with 14 more left out because at least one datasheet does not publish them.

See all 11 differences
How alike are they
7 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 18 parameters
Parameter SG40CX-P2 SE66.6K (for 220V/230V line-to-line grids) Difference
Rated AC power 40.00 kW 38.45 kW 1.55 kW apart
Max DC voltage 1100 V 600 V 500 V apart
Max AC power 44.00 kW 38.45 kW 5.55 kW apart
Max PV power 56.00 kW 67.28 kW 11.28 kW apart
DC/AC ratio 1.40 1.75 0.35 more oversizing headroom
European efficiency 98.3 % 98.0 % 0.3 pp more efficient
Nominal AC voltage 400 V 230 V 170 V apart
Max AC current 66.9 A 96.5 A 29.6 A apart
Max efficiency 98.5 % 98.3 % 0.2 pp more efficient
Ingress protection IP66 IP65 IP66 vs IP65
MPPT voltage range 160-1000 V 370-600 V 160-1000 V vs 370-600 V
02

Full specification

Parameter SG40CX-P2 SE66.6K (for 220V/230V line-to-line grids) Difference
AC output
Rated AC power 40.00 kW 38.45 kW 1.55 kW apart
Max AC power 44.00 kW 38.45 kW 5.55 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage 400 V 230 V 170 V apart
Max AC current 66.9 A 96.5 A 29.6 A apart
PV input
Max PV power 56.00 kW 67.28 kW 11.28 kW apart
DC/AC ratio 1.40 1.75 +0.35 for SE66.6K (for 220V/230V line-to-line grids)
Max DC voltage 1100 V 600 V 500 V apart
MPPT voltage range 160-1000 V 370-600 V 160-1000 V vs 370-600 V
Start voltage 200 V - Not published by SolarEdge
MPP trackers 4 - Not published by SolarEdge
Strings per tracker 2 - Not published by SolarEdge
Max input current per tracker 30.0 A - Not published by SolarEdge
Efficiency
European efficiency 98.3 % 98.0 % +0.3 pp for SG40CX-P2
Max efficiency 98.5 % 98.3 % +0.2 pp for SG40CX-P2
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 40.0 kg - Not published by SolarEdge
Weight per kW 1.0 kg/kW - Not published by SolarEdge
Dimensions 575x645x245 mm - Not published by SolarEdge
Ingress protection IP66 IP65 IP66 vs IP65
Cooling forced-air forced-air Same
Noise - 67 dB Not published by Sungrow
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi Yes Yes Same
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.