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STP 15-50 (Sunny Tripower X 15) vs SG15KTL-M 8 of 20 identical Swap Change inverters

SMA Solar STP 15-50 (Sunny Tripower X 15) vs Sungrow SG15KTL-M

SMA Solar STP 15-50 (Sunny Tripower X 15)
SMA Solar
STP 15-50 (Sunny Tripower X 15)
15 kW 97.8 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Sungrow
SG15KTL-M
15 kW 98.3 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SG15KTL-M leads on the differences that matter

The largest is european efficiency: 0.5 pp more efficient. 8 of 20 comparable parameters are identical, with 12 more left out because at least one datasheet does not publish them.

See all 12 differences
How alike are they
8 of 20 comparable
parameters are identical
identical differs not published
01

What actually differs

12 of 20 parameters
Parameter STP 15-50 (Sunny Tripower X 15) SG15KTL-M Difference
European efficiency 97.8 % 98.3 % 0.5 pp more efficient
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 2.3 kg/kW 1.6 kg/kW 0.7 kg/kW lighter
Max efficiency 98.2 % 98.6 % 0.4 pp more efficient
Nominal AC voltage 230 V 400 V 170 V apart
Start voltage 188 V 250 V 62 V earlier start
MPP trackers 3 2 1 tracker more
Max AC current 25.0 A 24.0 A 1.0 A apart
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 15-50 (Sunny Tripower X 15) SG15KTL-M Difference
AC output
Rated AC power 15.00 kW 15.00 kW Same
Max AC power 15.00 kW 15.00 kW Same
Grid connection 3-phase 3-phase Same
Nominal AC voltage 230 V 400 V 170 V apart
Max AC current 25.0 A 24.0 A 1.0 A apart
PV input
Max PV power 22.50 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 15-50 (Sunny Tripower X 15)
MPP trackers 3 2 +1 trackers for STP 15-50 (Sunny Tripower X 15)
Strings per tracker 2 2 Same
Max input current per tracker 24.0 A 22.0 A +2.0 A for STP 15-50 (Sunny Tripower X 15)
Efficiency
European efficiency 97.8 % 98.3 % +0.5 pp for SG15KTL-M
Max efficiency 98.2 % 98.6 % +0.4 pp for SG15KTL-M
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 24.0 kg -11.0 kg for SG15KTL-M
Weight per kW 2.3 kg/kW 1.6 kg/kW -0.7 kg/kW for SG15KTL-M
Dimensions 762x728x266 mm 485x370x210 mm 762x728x266 mm vs 485x370x210 mm
Ingress protection IP65 IP65 Same
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 5 yrs - Not published by Sungrow
03

More useful comparisons

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Sungrow SG15KTL-M vs Growatt MOD 15KTL3-X
9 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.