Sungrow SG125CX-P2 125kW Commercial 3-Phase Inverter

  
By Sungrow
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Sungrow SG125CX‑P2 125 kW 3‑Phase Commercial Solar Inverter

  • 125 kW three‑phase inverter for large commercial and industrial PV systems up to 175 kW DC, ideal for logistics centres, warehouses and ground‑mount arrays.
  • 12 independent MPPTs with two strings each for highly flexible string design and strong performance on complex or partially shaded sites.
  • IP66, C5‑rated enclosure with integrated DC/AC surge protection and AFCI 2.0 support for reliable outdoor operation in harsh and coastal environments.

The Sungrow SG125CX‑P2 is a 125 kW three‑phase string inverter for 1000 V DC commercial and industrial solar systems up to 175 kW of PV modules. It suits large rooftops and mid‑scale ground‑mount projects on logistics hubs, factories, cold stores and depots where dependable output, grid support and straightforward servicing are key. With 12 MPPTs, high efficiency and robust protection, it provides a practical backbone for multi‑string PV systems connected to 230/400 V three‑phase supplies.

Key features

  • 12 MPPTs, each supporting two strings, for fine‑grained string layout and better yield across mixed orientations and shading conditions.
  • Max. efficiency 98.5 % and European efficiency 98.3 %, helping to minimise conversion losses on high‑capacity arrays.
  • Dynamic shading optimisation mode plus smart IV‑curve diagnosis and grid fault recording for easier remote monitoring and O&M.
  • Compatible with aluminium AC cables up to 240 mm² and drawer‑style cable sealing plate to support AC cable pre‑assembly.
  • Integrated DC Type I+II and AC Type II surge protection, AFCI 2.0 support, IP66 and C5 anti‑corrosion rating for long‑term outdoor use.

Technical specifications

DC input

  • Recommended max. PV input power: 175 kW.
  • Max. PV input voltage: 1100 V DC.
  • Min. PV input voltage / start‑up input voltage: 180 V DC / 200 V DC.
  • Rated PV input voltage: 600 V DC.
  • MPP voltage range: 180 V – 1000 V DC.
  • Number of independent MPP inputs: 12.
  • Number of PV strings per MPPT: 2.
  • Max. PV input current: 360 A (30 A × 12).
  • Max. DC short‑circuit current: 480 A (40 A × 12).
  • Max. current for DC connector: 20 A.
  • DC 15 A current input per string, compatible with over 500 W+ PV modules.

AC output

  • Max. AC output power: 125 kVA.
  • Rated AC output apparent power: 125 kVA.
  • Max. AC output current: 181.1 A.
  • Rated AC output current (at 230 V phase‑neutral): 181.1 A.
  • Rated AC voltage: 3 / N / PE, 230 / 400 V.
  • AC voltage range: 320 V – 480 V.
  • Rated grid frequency: 50 Hz / 60 Hz.
  • Grid frequency range: 45 – 55 Hz / 55 – 65 Hz.
  • Harmonic (THD): < 3 % at rated power.
  • Power factor at rated power / adjustable power factor: > 0.99 / 0.8 leading – 0.8 lagging.
  • Feed‑in phases / connection phases: 3 / 3‑N‑PE.

Efficiency

  • Max. efficiency: 98.5 %.
  • European efficiency: 98.3 %.

Protection and monitoring

  • Grid monitoring: yes.
  • DC reverse‑polarity protection: yes.
  • AC short‑circuit protection: yes.
  • Leakage current protection: yes.
  • Surge protection: DC Type I+II / AC Type II.
  • Ground fault monitoring: yes.
  • DC switch: yes.
  • PV string monitoring: yes.
  • Q‑at‑night function: yes.
  • Arc fault circuit interrupter (AFCI): yes.
  • PID recovery function: yes.

General data

  • Dimensions (W × H × D): 1020 × 795 × 360 mm.
  • Mounting method: wall‑mounting bracket.
  • Weight: 87 kg.
  • Topology: transformerless.
  • Degree of protection: IP66.
  • Corrosion category: C5.
  • Night power consumption: < 5 W.
  • Operating ambient temperature range: −30 °C to 60 °C.
  • Allowable relative humidity range (non‑condensing): 0 % – 100 %.
  • Cooling method: smart forced‑air cooling.
  • Max. operating altitude: 4000 m (derating above 3000 m).
  • Display: LED, Bluetooth + app.
  • Communication: RS485 / optional WLAN, Ethernet.
  • DC connection type: Evo2 (max. 6 mm²).
  • AC connection type: OT / DT terminal (max. 240 mm²).
  • Grid compliance: IEC 62109‑1, EN/IEC 61000‑6‑1/2/3/4, IEC 61727, IEC 62116, EN 50549‑1/2, UTE C15‑712‑1, VDE V 0126‑1‑1, VDE‑AR‑N 4105:2018, VFR 2019, NC RfG, G99, UNE 217002, NTS, CEI 0‑21 2019, CEI 0‑16 2019, NRS‑097‑2‑1.
  • Grid support: Q‑at‑night function, LVRT, HVRT, active and reactive power control, power ramp‑rate control.

Shipping and installation

Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If a shipping rate is not shown at checkout, please contact us on +44 2080 640335 or info@energian.co.uk for a tailored quote.

This is a high‑power grid‑connected commercial inverter and is not a plug‑and‑play product. We recommend installation and commissioning by one of our trusted solar partners or a suitably qualified electrician experienced with G99 and commercial three‑phase systems.

UK expert support

Energian provides UK‑based technical support for Sungrow commercial inverters. If you need help with system design, protection coordination, grid connection studies or compatibility with your PV modules and switchgear, contact us by phone, email or live chat, or visit our office for an in‑person consultation.

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