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MID 40KTL3-X vs SE66.6K (for 220V/230V line-to-line grids) 7 of 18 identical Swap Change inverters

Growatt MID 40KTL3-X vs SolarEdge SE66.6K (for 220V/230V line-to-line grids)

Growatt MID 40KTL3-X
Growatt
MID 40KTL3-X
40 kW 98.5 % 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

MID 40KTL3-X leads on the differences that matter

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 MID 40KTL3-X SE66.6K (for 220V/230V line-to-line grids) Difference
Rated AC power 40.00 kW 38.45 kW 1.55 kW apart
European efficiency 98.5 % 98.0 % 0.5 pp more efficient
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 60.00 kW 67.28 kW 7.28 kW apart
DC/AC ratio 1.50 1.75 0.25 more oversizing headroom
Max efficiency 98.8 % 98.3 % 0.5 pp more efficient
Nominal AC voltage 400 V 230 V 170 V apart
Max AC current 66.6 A 96.5 A 29.9 A apart
Ingress protection IP66 IP65 IP66 vs IP65
MPPT voltage range 200-1000 V 370-600 V 200-1000 V vs 370-600 V
02

Full specification

Parameter MID 40KTL3-X 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 66.6 A 96.5 A 29.9 A apart
PV input
Max PV power 60.00 kW 67.28 kW 7.28 kW apart
DC/AC ratio 1.50 1.75 +0.25 for SE66.6K (for 220V/230V line-to-line grids)
Max DC voltage 1100 V 600 V 500 V apart
MPPT voltage range 200-1000 V 370-600 V 200-1000 V vs 370-600 V
Start voltage 250 V - Not published by SolarEdge
MPP trackers - - Neither datasheet publishes this
Strings per tracker 2 - Not published by SolarEdge
Max input current per tracker 26.0 A - Not published by SolarEdge
Efficiency
European efficiency 98.5 % 98.0 % +0.5 pp for MID 40KTL3-X
Max efficiency 98.8 % 98.3 % +0.5 pp for MID 40KTL3-X
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 30.5 kg - Not published by SolarEdge
Weight per kW 0.8 kg/kW - Not published by SolarEdge
Dimensions 435x580x230 mm - Not published by SolarEdge
Ingress protection IP66 IP65 IP66 vs IP65
Cooling forced-air forced-air Same
Noise - 67 dB Not published by Growatt
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 5 yrs - Not published by SolarEdge
03

More useful comparisons

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7 differences, the largest is max ac power
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Ginlong Solis
Growatt MID 40KTL3-X vs Solis-40K
7 differences, the largest is max pv power
Same type, similar size
Sungrow
Growatt MID 40KTL3-X vs Sungrow SG40CX-P2
10 differences, the largest is max input current per tracker
04

Written summary

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