Skip to main content
STP 20000TL-30 vs Fronius Verto 20.0 10 of 24 identical Swap Change inverters

SMA Solar STP 20000TL-30 vs Fronius Verto 20.0

SMA Solar
STP 20000TL-30
20 kW 98.0 % 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

14 differences, and they point both ways

The largest is max input current per tracker: 5.0 A more headroom. 10 of 24 comparable parameters are identical, with 8 more left out because at least one datasheet does not publish them.

See all 14 differences
How alike are they
10 of 24 comparable
parameters are identical
identical differs not published
01

What actually differs

14 of 24 parameters
Parameter STP 20000TL-30 Fronius Verto 20.0 Difference
Max input current per tracker 33.0 A 28.0 A 5.0 A more headroom
European efficiency 98.0 % 98.3 % 0.3 pp more efficient
Max PV power 36.00 kW 30.00 kW 6.00 kW apart
DC/AC ratio 1.80 1.50 0.30 more oversizing headroom
MPP trackers 2 4 2 trackers more
Weight 61.0 kg 35.2 kg 25.8 kg lighter
Weight per kW 3.0 kg/kW 1.8 kg/kW 1.3 kg/kW lighter
Noise 51 dB 56 dB 6 dB quieter
Start voltage 188 V 150 V 38 V earlier start
Ingress protection IP65 IP66 IP65 vs IP66
Max AC current 29.0 A 30.3 A 1.3 A apart
MPPT voltage range 240-800 V 150-870 V 240-800 V vs 150-870 V
Strings per tracker 3 2 1 string apart
Dimensions 682x661x264 mm 730x540x278 mm 682x661x264 mm vs 730x540x278 mm
02

Full specification

Parameter STP 20000TL-30 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 400 V 400 V Same
Max AC current 29.0 A 30.3 A 1.3 A apart
PV input
Max PV power 36.00 kW 30.00 kW 6.00 kW apart
DC/AC ratio 1.80 1.50 +0.30 for STP 20000TL-30
Max DC voltage 1000 V 1000 V Same
MPPT voltage range 240-800 V 150-870 V 240-800 V vs 150-870 V
Start voltage 188 V 150 V -38 V for Fronius Verto 20.0
MPP trackers 2 4 +2 trackers for Fronius Verto 20.0
Strings per tracker 3 2 1 string apart
Max input current per tracker 33.0 A 28.0 A +5.0 A for STP 20000TL-30
Efficiency
European efficiency 98.0 % 98.3 % +0.3 pp for Fronius Verto 20.0
Max efficiency 98.4 % 98.6 % Effectively the same
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 61.0 kg 35.2 kg -25.8 kg for Fronius Verto 20.0
Weight per kW 3.0 kg/kW 1.8 kg/kW -1.3 kg/kW for Fronius Verto 20.0
Dimensions 682x661x264 mm 730x540x278 mm 682x661x264 mm vs 730x540x278 mm
Ingress protection IP65 IP66 IP65 vs IP66
Cooling forced-air forced-air Same
Noise 51 dB 56 dB -6 dB for STP 20000TL-30
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi - Yes Not published by SMA Solar
Ethernet Yes Yes Same
Arc fault protection - Yes Not published by SMA Solar
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs - Not published by Fronius International
03

More useful comparisons

Open all inverters
Same type, similar size
Growatt
SMA Solar STP 20000TL-30 vs Growatt MID 20KTL3-X
12 differences, the largest is european efficiency
Same type, similar size
Sungrow
SMA Solar STP 20000TL-30 vs Sungrow SG20KTL-M
11 differences, the largest is max dc voltage
Same type, similar size
Huawei
SMA Solar STP 20000TL-30 vs Huawei SUN2000-20KTL-M2
15 differences, the largest is max dc voltage
Same type, similar size
Huawei
Fronius Verto 20.0 vs Huawei SUN2000-20KTL-M0
12 differences, the largest is max dc voltage
04

Written summary

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