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STP 12-50 (Sunny Tripower X 12) vs SG12RT-20 9 of 20 identical Swap Change inverters

SMA Solar STP 12-50 (Sunny Tripower X 12) vs Sungrow SG12RT-20

SMA Solar STP 12-50 (Sunny Tripower X 12)
SMA Solar
STP 12-50 (Sunny Tripower X 12)
12 kW 97.6 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Sungrow SG12RT-20
Sungrow
SG12RT-20
12 kW 98.1 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SG12RT-20 leads on the differences that matter

The largest is european efficiency: 0.5 pp more efficient. 9 of 20 comparable parameters are identical, with 12 more left out because at least one datasheet does not publish them.

See all 11 differences
How alike are they
9 of 20 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 20 parameters
Parameter STP 12-50 (Sunny Tripower X 12) SG12RT-20 Difference
European efficiency 97.6 % 98.1 % 0.5 pp more efficient
Max DC voltage 1000 V 1100 V 100 V apart
Weight 35.0 kg 17.0 kg 18.0 kg lighter
Weight per kW 2.9 kg/kW 1.4 kg/kW 1.5 kg/kW lighter
Max input current per tracker 24.0 A 25.0 A 1.0 A more headroom
Max efficiency 98.2 % 98.5 % 0.3 pp more efficient
Nominal AC voltage 230 V 400 V 170 V apart
MPP trackers 3 2 1 tracker more
MPPT voltage range 150-1000 V 160-1000 V 150-1000 V vs 160-1000 V
Strings per tracker 2 1 1 string apart
Dimensions 762x728x266 mm 480x370x195 mm 762x728x266 mm vs 480x370x195 mm
02

Full specification

Parameter STP 12-50 (Sunny Tripower X 12) SG12RT-20 Difference
AC output
Rated AC power 12.00 kW 12.00 kW Same
Max AC power 12.00 kW 12.00 kW Same
Grid connection 3-phase 3-phase Same
Nominal AC voltage 230 V 400 V 170 V apart
Max AC current 20.0 A 20.0 A Same
PV input
Max PV power 18.00 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 160-1000 V 150-1000 V vs 160-1000 V
Start voltage 188 V 180 V Effectively the same
MPP trackers 3 2 +1 trackers for STP 12-50 (Sunny Tripower X 12)
Strings per tracker 2 1 1 string apart
Max input current per tracker 24.0 A 25.0 A +1.0 A for SG12RT-20
Efficiency
European efficiency 97.6 % 98.1 % +0.5 pp for SG12RT-20
Max efficiency 98.2 % 98.5 % +0.3 pp for SG12RT-20
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 17.0 kg -18.0 kg for SG12RT-20
Weight per kW 2.9 kg/kW 1.4 kg/kW -1.5 kg/kW for SG12RT-20
Dimensions 762x728x266 mm 480x370x195 mm 762x728x266 mm vs 480x370x195 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

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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.