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SG250-350HX-20 Solar String Inverters
SG250-350HX-20 Solar String Inverters

SG250-350HX-20 Solar String Inverters

SG250-350HX-20 Solar inverters with 6 MPPTs (99% efficiency), 24-30 inputs, IP66/C5 protection, real-time monitoring, low-cost operation in harsh environments.

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Description

HIGH YIELD

Up to 6 MPPTs with 99% maximum efficiency

65–75A per MPPT, compatible with diverse PV module configurations

Max 24-30 inputs, supporting flexible DC/AC ratios

Scalable design for optimized energy harvesting

PROVEN SAFETY

Integrated intelligent DC switch for automatic fault isolation

24/7 real-time insulation monitoring (AC/DC circuits)

IP66 & C5-M corrosion-resistant enclosure, engineered for extreme environments

IP68 self-cleaning cooling system: Dust-proof, low-noise operation, and extended lifespan

LOW COST

Nighttime reactive power (Q) support: Reduces auxiliary equipment costs

Power Line Communication (PLC): Eliminates dedicated communication wiring

Smart IV Curve Diagnosis: Enables predictive maintenance and lowers O&M expenses

GRID-FRIENDLY

Stable operation in weak grids (SCR ≥1.1)

30ms reactive power response (industry-leading speed)

Global grid code compliance: IEEE, IEC, VDE, and regional standards

Advanced grid support functions (LVRT/HVRT, frequency ride-through)


Type DesignationSG250HX-20SG320HX-20SG350HX-20

Input ( DC )

  • Max. PV input voltage1500 V
  • Min. PV input voltage / Startup input voltage500 V / 550 V
  • Nominal PV input voltage1080 V
  • MPPT voltage range500 V – 1500 V
  • No. of independent MPP inputs6
  • Max. number of input connector per MPPT45
  • Max. PV input current6 * 65 A6 * 75 A
  • Max. DC short-circuit current per MPPT6 * 100 A6 * 125 A

Output ( AC )

  • AC output power250 kW @ 40 ℃352 kVA @ 30 ℃ / 320 kVA @ 40 ℃ / 300 kVA @ 51 ℃ / 301.8 kVA @ 50 ℃352 kVA @ 30 ℃ / 320 kVA @ 40 ℃ / 295 kVA @ 50 ℃
  • Max. AC output power198.5 A254 A254A (Nominal output 231A)
  • Nominal AC voltage3 / PE, 800 V
  • AC voltage range640 – 920V
  • Nominal grid frequency / Grid frequency range50 Hz / 45 – 55 Hz, 60 Hz / 55 – 65 Hz
  • THD< 1 % ( Rated Condition )
  • DC current injection< 0.5 % In
  • Power factor at nominal power / Adjustable power factor> 0.99 / 0.8 leading – 0.8 lagging
  • Feed-in phases / AC connection3 / 3
  • Max. efficiency / European efficiency99.02 % / 98.8 %

Protection

  • DC reverse connection protectionYes
  • AC short circuit protectionYes
  • Leakage current protectionYes
  • Grid monitoringYes
  • Ground fault monitoringYes
  • DC switchYes
  • AC switchNo
  • PV string monitoringYes
  • Q at night functionYes
  • Anti-PID and PID recovery functionOptional
  • Surge protectionDC Type II / AC Type II

General Data

  • Dimensions ( W * H * D )1148 mm * 779 mm * 371 mm
  • Weight≤ 106 kg
  • TopologyTransformerless
  • Ingress protection ratingIP66
  • Night power consumption< 6 W
  • Operating ambient temperature range-30 to 60 ℃
  • Allowable relative humidity range0 % - 100 %
  • Cooling methodSmart forced air cooling
  • Max. operating altitude5000 m ( > 4000 m derating )
  • DisplayLED, Bluetooth+APP
  • CommunicationRS485 / PLC
  • DC connection typeEvo2
  • AC connection typeSupport OT / DT terminal (Max. 400 mm²)
  • ComplianceIEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, NBR16149, NBR16150, ABNT NBR IEC62216IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, EN 50549-2IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, VDE-AR-N 4110:2018, VDEAR-N 4120:2018, EN 50549-2, UNE 217002, NTS, UTE C15-712-1:2013
  • Grid SupportQ at night function, LVRT, HVRT,active & reactive power control and power ramp rate control, Q-U control, P-f control


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