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STP 20-US-50 (Sunny Tripower X-US 20) vs SG20KTL-M 7 of 18 identical Swap Change inverters

SMA Solar STP 20-US-50 (Sunny Tripower X-US 20) vs Sungrow SG20KTL-M

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
VS
Sungrow
SG20KTL-M
20 kW 98.3 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

11 differences, and they point both ways

The largest is max dc voltage: 100 V 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 STP 20-US-50 (Sunny Tripower X-US 20) SG20KTL-M Difference
Max DC voltage 1000 V 1100 V 100 V apart
Max input current per tracker 24.0 A 22.0 A 2.0 A more headroom
Weight 35.0 kg 24.0 kg 11.0 kg lighter
Weight per kW 1.8 kg/kW 1.2 kg/kW 0.6 kg/kW lighter
Nominal AC voltage 480 V 400 V 80 V apart
Max AC current 24.0 A 31.9 A 7.9 A apart
Start voltage 188 V 250 V 62 V earlier start
MPP trackers 3 2 1 tracker more
Ingress protection Type 4X (UL 50E) IP65 Type 4X (UL 50E) vs IP65
MPPT voltage range 150-1000 V 200-1000 V 150-1000 V vs 200-1000 V
Dimensions 762x728x266 mm 485x370x210 mm 762x728x266 mm vs 485x370x210 mm
02

Full specification

Parameter STP 20-US-50 (Sunny Tripower X-US 20) SG20KTL-M Difference
AC output
Rated AC power 20.00 kW 20.00 kW Same
Max AC power 20.00 kW 20.00 kW Same
Grid connection 3-phase 3-phase Same
Nominal AC voltage 480 V 400 V 80 V apart
Max AC current 24.0 A 31.9 A 7.9 A apart
PV input
Max PV power 30.00 kW - Not published by Sungrow
DC/AC ratio 1.50 - Not published by Sungrow
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-US-50 (Sunny Tripower X-US 20)
MPP trackers 3 2 +1 trackers for STP 20-US-50 (Sunny Tripower X-US 20)
Strings per tracker 2 2 Same
Max input current per tracker 24.0 A 22.0 A +2.0 A for STP 20-US-50 (Sunny Tripower X-US 20)
Efficiency
European efficiency - 98.3 % Not published by SMA Solar
Max efficiency - 98.6 % Not published by SMA Solar
CEC efficiency 97.5 % - Not published by Sungrow
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 24.0 kg -11.0 kg for SG20KTL-M
Weight per kW 1.8 kg/kW 1.2 kg/kW -0.6 kg/kW for SG20KTL-M
Dimensions 762x728x266 mm 485x370x210 mm 762x728x266 mm vs 485x370x210 mm
Ingress protection Type 4X (UL 50E) IP65 Type 4X (UL 50E) vs IP65
Cooling forced-air forced-air Same
Noise 59 dB - Not published by Sungrow
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi Yes - Not published by Sungrow
Ethernet Yes - Not published by Sungrow
Arc fault protection Yes - Not published by Sungrow
Integrated DC switch Yes Yes Same
Warranty
Warranty 10 yrs - Not published by Sungrow
03

More useful comparisons

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SMA Solar STP 20-US-50 (Sunny Tripower X-US 20) vs Fronius Verto 20.0
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Huawei
SMA Solar STP 20-US-50 (Sunny Tripower X-US 20) vs Huawei SUN2000-20KTL-M2
13 differences, the largest is max dc voltage
Same type, similar size
Huawei
Sungrow SG20KTL-M vs Huawei SUN2000-20KTL-M0
8 differences, the largest is max ac power
04

Written summary

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