On-Grid
SMA undefined STP 125-70
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SMA • Sunny Tripower 125

STP 125-70

Region:Germany
Region shows where the seller or factory is located. Most ship globally, and all listed suppliers should be able to ship to your current location.
125kW
Nominal AC Power
98.4%
Max Efficiency
1020 x 795
Dimensions (mm)
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Ideal Use Case

The SMA STP 125-70 is tailored for specific solar energy needs. This inverter is an excellent choice if you:

Manage a large 125.0 kW commercial or industrial solar array
Use three-phase grid connection
Need 12 independent MPPT trackers for different roof orientations
Want maximum energy harvest (98.4% peak efficiency)
Focus on grid-tied operation without battery storage
Operate in extremely cold climates

Don’t guess your solar setup — calculate it first!

Take our Solar Quiz to get a personalized recommendation for panels, inverter, battery capacity, and system size — before you spend money on the wrong setup.

Run Technical Sizing

AC Output Data

Nominal AC Power125 kW
Max Efficiency98.4 %
Euro Efficiency98.1 %
Max AC Current0 A
Rated AC Current0 A
Number of Feed-in Phases3
THD (Total Harmonic Distortion)3 %

DC Input Data

MPP Voltage Range180~1000 V
Max DC Voltage1100 V
Rated DC Voltage600 V
Min DC Voltage to Start0 V
Max DC Current0 A
Number of MPP Trackers12
DC Inputs24

Mechanical & Environmental Data

Dimensions (W x H x D)1020 x 795 x 360 mm
Weight96.0 kg
Protection ClassIP65
DisplayLED
InterfaceEthernet, WLAN

Operating Conditions

Operating Temperature-25 ~ +60 ℃
Frequency45-65 Hz
Power Consumption (Night)0 W

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Product FAQ

What size solar array can the SMA STP 125-70 handle?

The SMA STP 125-70 has a nominal AC output of 125kW with a maximum efficiency of 98.4%. It is typically paired with a solar array of 150–163kW DC for optimal energy harvest.

Is the SMA STP 125-70 a hybrid inverter?

The SMA STP 125-70 is a on-grid inverter. To add battery storage, you would need a separate AC-coupled battery inverter or upgrade to a hybrid model.

Does the SMA STP 125-70 have WiFi monitoring?

Most SMA inverters come with or support optional WiFi/Ethernet dongles. This allows you to track your solar production and battery status via a mobile app or web portal in real-time.

How many MPPT trackers does the SMA STP 125-70 have?

This inverter features 12 independent MPPT trackers with a maximum DC input voltage of 1100V. Multiple trackers allow panels on different roof faces or orientations to operate independently for maximum yield.

Is the SMA STP 125-70 a three-phase inverter?

Yes, this is a three-phase inverter. Three-phase inverters are ideal for larger homes, commercial systems, or regions with three-phase grid connections.