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

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

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

Full specification

Parameter SG12RT-20 STP 12-50 (Sunny Tripower X 12) 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 400 V 230 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 1100 V 1000 V 100 V apart
MPPT voltage range 160-1000 V 150-1000 V 160-1000 V vs 150-1000 V
Start voltage 180 V 188 V Effectively the same
MPP trackers 2 3 +1 trackers for STP 12-50 (Sunny Tripower X 12)
Strings per tracker 1 2 1 string apart
Max input current per tracker 25.0 A 24.0 A +1.0 A for SG12RT-20
Efficiency
European efficiency 98.1 % 97.6 % +0.5 pp for SG12RT-20
Max efficiency 98.5 % 98.2 % +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 17.0 kg 35.0 kg -18.0 kg for SG12RT-20
Weight per kW 1.4 kg/kW 2.9 kg/kW -1.5 kg/kW for SG12RT-20
Dimensions 480x370x195 mm 762x728x266 mm 480x370x195 mm vs 762x728x266 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.