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STP 20-50 (Sunny Tripower X 20) vs MID 20KTL3-X 11 of 23 identical Swap Change inverters

SMA Solar STP 20-50 (Sunny Tripower X 20) vs Growatt MID 20KTL3-X

SMA Solar STP 20-50 (Sunny Tripower X 20)
SMA Solar
STP 20-50 (Sunny Tripower X 20)
20 kW 97.9 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Growatt MID 20KTL3-X
Growatt
MID 20KTL3-X
20 kW 98.6 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

MID 20KTL3-X leads on the differences that matter

The largest is european efficiency: 0.7 pp more efficient. 11 of 23 comparable parameters are identical, with 9 more left out because at least one datasheet does not publish them.

See all 12 differences
How alike are they
11 of 23 comparable
parameters are identical
identical differs not published
01

What actually differs

12 of 23 parameters
Parameter STP 20-50 (Sunny Tripower X 20) MID 20KTL3-X Difference
European efficiency 97.9 % 98.6 % 0.7 pp more efficient
Max DC voltage 1000 V 1100 V 100 V apart
Max efficiency 98.2 % 98.8 % 0.5 pp more efficient
Max AC power 20.00 kW 22.00 kW 2.00 kW apart
Weight 35.0 kg 23.0 kg 12.0 kg lighter
Weight per kW 1.8 kg/kW 1.1 kg/kW 0.6 kg/kW lighter
Nominal AC voltage 230 V 400 V 170 V apart
Max AC current 36.6 A 31.9 A 4.7 A apart
Start voltage 188 V 250 V 62 V earlier start
MPP trackers 3 2 1 tracker more
MPPT voltage range 150-1000 V 200-1000 V 150-1000 V vs 200-1000 V
Dimensions 762x728x266 mm 395x525x222 mm 762x728x266 mm vs 395x525x222 mm
02

Full specification

Parameter STP 20-50 (Sunny Tripower X 20) MID 20KTL3-X Difference
AC output
Rated AC power 20.00 kW 20.00 kW Same
Max AC power 20.00 kW 22.00 kW 2.00 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage 230 V 400 V 170 V apart
Max AC current 36.6 A 31.9 A 4.7 A apart
PV input
Max PV power 30.00 kW 30.00 kW Same
DC/AC ratio 1.50 1.50 Same
Max DC voltage 1000 V 1100 V 100 V apart
MPPT voltage range 150-1000 V 200-1000 V 150-1000 V vs 200-1000 V
Start voltage 188 V 250 V -62 V for STP 20-50 (Sunny Tripower X 20)
MPP trackers 3 2 +1 trackers for STP 20-50 (Sunny Tripower X 20)
Strings per tracker 2 - Not published by Growatt
Max input current per tracker 24.0 A - Not published by Growatt
Efficiency
European efficiency 97.9 % 98.6 % +0.7 pp for MID 20KTL3-X
Max efficiency 98.2 % 98.8 % +0.5 pp for MID 20KTL3-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 35.0 kg 23.0 kg -12.0 kg for MID 20KTL3-X
Weight per kW 1.8 kg/kW 1.1 kg/kW -0.6 kg/kW for MID 20KTL3-X
Dimensions 762x728x266 mm 395x525x222 mm 762x728x266 mm vs 395x525x222 mm
Ingress protection IP65 IP65 Same
Cooling forced-air forced-air Same
Noise 59 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 - Not published by Growatt
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs 5 yrs Same
03

More useful comparisons

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Huawei
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14 differences, the largest is max dc voltage
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Huawei
Growatt MID 20KTL3-X vs Huawei SUN2000-20KTL-M0
8 differences, the largest is weight
04

Written summary

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