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STP 20-50 (Sunny Tripower X 20) vs Fronius Verto 20.0 15 of 26 identical Swap Change inverters

SMA Solar STP 20-50 (Sunny Tripower X 20) vs Fronius Verto 20.0

SMA Solar STP 20-50 (Sunny Tripower X 20)
SMA Solar
STP 20-50 (Sunny Tripower X 20)
20 kW 97.9 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Fronius Verto 20.0
Fronius International
Fronius Verto 20.0
20 kW 98.3 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

Fronius Verto 20.0 leads on the differences that matter

The largest is max input current per tracker: 4.0 A more headroom. 15 of 26 comparable parameters are identical, with 6 more left out because at least one datasheet does not publish them.

See all 11 differences
How alike are they
15 of 26 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 26 parameters
Parameter STP 20-50 (Sunny Tripower X 20) Fronius Verto 20.0 Difference
Max input current per tracker 24.0 A 28.0 A 4.0 A more headroom
European efficiency 97.9 % 98.3 % 0.4 pp more efficient
Max efficiency 98.2 % 98.6 % 0.4 pp more efficient
Nominal AC voltage 230 V 400 V 170 V apart
Max AC current 36.6 A 30.3 A 6.3 A apart
MPP trackers 3 4 1 tracker more
Start voltage 188 V 150 V 38 V earlier start
Ingress protection IP65 IP66 IP65 vs IP66
Noise 59 dB 56 dB 2 dB quieter
MPPT voltage range 150-1000 V 150-870 V 150-1000 V vs 150-870 V
Dimensions 762x728x266 mm 730x540x278 mm 762x728x266 mm vs 730x540x278 mm
02

Full specification

Parameter STP 20-50 (Sunny Tripower X 20) Fronius Verto 20.0 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 230 V 400 V 170 V apart
Max AC current 36.6 A 30.3 A 6.3 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 1000 V 1000 V Same
MPPT voltage range 150-1000 V 150-870 V 150-1000 V vs 150-870 V
Start voltage 188 V 150 V -38 V for Fronius Verto 20.0
MPP trackers 3 4 +1 trackers for Fronius Verto 20.0
Strings per tracker 2 2 Same
Max input current per tracker 24.0 A 28.0 A +4.0 A for Fronius Verto 20.0
Efficiency
European efficiency 97.9 % 98.3 % +0.4 pp for Fronius Verto 20.0
Max efficiency 98.2 % 98.6 % +0.4 pp for Fronius Verto 20.0
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 35.2 kg Effectively the same
Weight per kW 1.8 kg/kW 1.8 kg/kW Same
Dimensions 762x728x266 mm 730x540x278 mm 762x728x266 mm vs 730x540x278 mm
Ingress protection IP65 IP66 IP65 vs IP66
Cooling forced-air forced-air Same
Noise 59 dB 56 dB -2 dB for Fronius Verto 20.0
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi Yes Yes Same
Ethernet Yes Yes Same
Arc fault protection Yes Yes Same
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs - Not published by Fronius International
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.