SolaX X3 Forth String Three Phase Inverter Range

SolaX X3 Forth String Three Phase Inverter Range

The SolaX X3 Forth series is a flagship three-phase string inverter line engineered for large commercial, industrial, and utility-scale solar PV systems. With power ratings from 75kW up to 150kW, the X3 Forth delivers outstanding efficiency, advanced safety, and flexible system design for high-yield energy generation.

Key Features

• Available sizes: 80kW, 100kW, 110kW, 120kW, 125kW
• Up to 12 independent MPPTs, 2 strings per tracker (24 strings total)
• Ultra-wide MPPT voltage range: 180–1000V DC (start-up voltage: 200V)
• Maximum DC input voltage: 1100V
• Maximum input current per MPPT: 32A (short-circuit current: 46A)
• Maximum PV array input power: up to 225kW (model dependent)
• 150% PV oversizing and 110% AC overloading capability
• Maximum efficiency: up to 99%
• Smart air cooling for efficient heat dissipation and longer system life
• Heat dissipation design reduces system weight and size by over 5%
• Night-time reactive power compensation
• I-V curve diagnosis and string current monitoring
• Built-in export power control and remote setting/upgrading
• 24-hour operation monitoring with Solax Cloud integration (open API)
• Type II SPD on both AC & DC sides for surge protection
• AC terminal temperature detection for added safety
• AFCI (Arc Fault Circuit Interrupter) protection (optional)
• IP66 protection for outdoor/indoor installation
• Aluminium AC cable connection available
• Parallel operation: up to 60 units (9MW) via SolaX Datahub 1000
• Compact and lightweight design: 985 × 660 × 327.5 mm, 77–83.3 kg
• Max. operation altitude: 4000m (derating above 3000m)
• Certifications: VDE4105, EN50549, CEI 0-21, IEC 62109-1/2, AS 4777.2, and more

Technical Specifications

• Phases: 3 (Three-phase)
• Max. DC input voltage: 1100V
• MPPT voltage range: 180–1000V
• Start-up voltage: 200V
• Number of MPPTs: up to 12
• Strings per MPPT: 2
• Max. input current per MPPT: 32A
• Max. short-circuit current per MPPT: 46A
• Max. PV array input power: up to 225kW (model dependent)
• Rated AC output power: 75kW to 150kW (model dependent

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on all orders

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Delivery fee of £15

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX