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STP 125-70 (Sunny Tripower 125) vs SG125CX-P2 18 of 23 identical Swap Change inverters

SMA Solar STP 125-70 (Sunny Tripower 125) vs Sungrow SG125CX-P2

SMA Solar STP 125-70 (Sunny Tripower 125)
SMA Solar
STP 125-70 (Sunny Tripower 125)
125 kW 98.1 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Sungrow SG125CX-P2
Sungrow
SG125CX-P2
125 kW 98.3 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SG125CX-P2 leads on the differences that matter

The largest is max pv power: 12.50 kW apart. 18 of 23 comparable parameters are identical, with 9 more left out because at least one datasheet does not publish them.

See all 5 differences
How alike are they
18 of 23 comparable
parameters are identical
identical differs not published
01

What actually differs

5 of 23 parameters
Parameter STP 125-70 (Sunny Tripower 125) SG125CX-P2 Difference
Max PV power 187.50 kW 175.00 kW 12.50 kW apart
Weight 96.0 kg 93.0 kg 3.0 kg lighter
European efficiency 98.1 % 98.3 % 0.2 pp more efficient
DC/AC ratio 1.50 1.40 0.10 more oversizing headroom
Ingress protection IP65 IP66 IP65 vs IP66
02

Full specification

Parameter STP 125-70 (Sunny Tripower 125) SG125CX-P2 Difference
AC output
Rated AC power 125.00 kW 125.00 kW Same
Max AC power 125.00 kW 125.00 kW Same
Grid connection 3-phase 3-phase Same
Nominal AC voltage 400 V 400 V Same
Max AC current 181.1 A 181.1 A Same
PV input
Max PV power 187.50 kW 175.00 kW 12.50 kW apart
DC/AC ratio 1.50 1.40 +0.10 for STP 125-70 (Sunny Tripower 125)
Max DC voltage 1100 V 1100 V Same
MPPT voltage range 180-1000 V 180-1000 V Same
Start voltage 200 V 200 V Same
MPP trackers 12 12 Same
Strings per tracker 2 2 Same
Max input current per tracker 30.0 A 30.0 A Same
Efficiency
European efficiency 98.1 % 98.3 % +0.2 pp for SG125CX-P2
Max efficiency 98.4 % 98.5 % 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 96.0 kg 93.0 kg -3.0 kg for SG125CX-P2
Weight per kW 0.8 kg/kW 0.7 kg/kW Effectively the same
Dimensions 795x1020x360 mm 795x1020x360 mm Same
Ingress protection IP65 IP66 IP65 vs IP66
Cooling forced-air forced-air Same
Noise 71 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 Yes Same
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs - Not published by Sungrow
03

More useful comparisons

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SMA Solar STP 125-70 (Sunny Tripower 125) vs Ginlong Solis S5-GC125K-HV
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SMA Solar STP 125-70 (Sunny Tripower 125) vs Growatt MAX 125KTL3-X LV
7 differences, the largest is max input current per tracker
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SMA Solar STP 125-70 (Sunny Tripower 125) vs SOFAR 125KTLX-G4-A
8 differences, the largest is max input current per tracker
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Ginlong Solis
Sungrow SG125CX-P2 vs Ginlong Solis S6-GC125K
8 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.