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MID 20KTL3-X vs STP 20-US-50 (Sunny Tripower X-US 20) 9 of 21 identical Swap Change inverters

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

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

STP 20-US-50 (Sunny Tripower X-US 20) leads on the differences that matter

The largest is warranty: 5 yrs longer. 9 of 21 comparable parameters are identical, with 11 more left out because at least one datasheet does not publish them.

See all 12 differences
How alike are they
9 of 21 comparable
parameters are identical
identical differs not published
01

What actually differs

12 of 21 parameters
Parameter MID 20KTL3-X STP 20-US-50 (Sunny Tripower X-US 20) Difference
Warranty 5 yrs 10 yrs 5 yrs longer
Max DC voltage 1100 V 1000 V 100 V apart
Max AC power 22.00 kW 20.00 kW 2.00 kW apart
Weight 23.0 kg 35.0 kg 12.0 kg lighter
Weight per kW 1.1 kg/kW 1.8 kg/kW 0.6 kg/kW lighter
Nominal AC voltage 400 V 480 V 80 V apart
Max AC current 31.9 A 24.0 A 7.9 A apart
Start voltage 250 V 188 V 62 V earlier start
MPP trackers 2 3 1 tracker more
Ingress protection IP65 Type 4X (UL 50E) IP65 vs Type 4X (UL 50E)
MPPT voltage range 200-1000 V 150-1000 V 200-1000 V vs 150-1000 V
Dimensions 395x525x222 mm 762x728x266 mm 395x525x222 mm vs 762x728x266 mm
02

Full specification

Parameter MID 20KTL3-X STP 20-US-50 (Sunny Tripower X-US 20) Difference
AC output
Rated AC power 20.00 kW 20.00 kW Same
Max AC power 22.00 kW 20.00 kW 2.00 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage 400 V 480 V 80 V apart
Max AC current 31.9 A 24.0 A 7.9 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 1100 V 1000 V 100 V apart
MPPT voltage range 200-1000 V 150-1000 V 200-1000 V vs 150-1000 V
Start voltage 250 V 188 V -62 V for STP 20-US-50 (Sunny Tripower X-US 20)
MPP trackers 2 3 +1 trackers for STP 20-US-50 (Sunny Tripower X-US 20)
Strings per tracker - 2 Not published by Growatt
Max input current per tracker - 24.0 A Not published by Growatt
Efficiency
European efficiency 98.6 % - Not published by SMA Solar
Max efficiency 98.8 % - Not published by SMA Solar
CEC efficiency - 97.5 % Not published by Growatt
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 23.0 kg 35.0 kg -12.0 kg for MID 20KTL3-X
Weight per kW 1.1 kg/kW 1.8 kg/kW -0.6 kg/kW for MID 20KTL3-X
Dimensions 395x525x222 mm 762x728x266 mm 395x525x222 mm vs 762x728x266 mm
Ingress protection IP65 Type 4X (UL 50E) IP65 vs Type 4X (UL 50E)
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 10 yrs +5 yrs for STP 20-US-50 (Sunny Tripower X-US 20)
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.