SolaX X3-Ultra 20.0kW HV 3-Phase Hybrid Inverter

  
By SolaX
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SolaX X3‑Ultra 20.0kW HV 3‑Phase Hybrid Inverter

  • 20kW three‑phase high‑voltage hybrid inverter for commercial and industrial solar‑plus‑storage systems.
  • 200% PV oversizing, up to 110% AC output and 60A battery charge / discharge for larger arrays and battery banks.
  • Microgrid and generator functions with fast EPS switchover for robust backup and off‑grid operation.

Brief description

The SolaX X3‑Ultra 20.0kW is a three‑phase C&I hybrid inverter designed to couple high‑power PV generation with high‑voltage lithium battery storage on a single platform. It offers 20kW rated output, support for substantial PV array sizes and an ultra‑wide operating voltage range, making it suitable for demanding commercial and industrial sites on three‑phase supply.

With up to 60A charging and discharging current, 200% PV oversizing and microgrid / generator modes, X3‑Ultra 20.0kW can be used for peak‑shaving, backup and islanded operation. Smart load management, VPP readiness and UPS‑level switchover help sites make better use of solar, storage and flexible loads such as heat pumps and EV chargers.

Key features

  • 20kW three‑phase hybrid inverter – Rated output power 20000W and 20000VA with 230 / 400V three‑phase operation for medium‑large sites.
  • High‑performance PV input – 40kWp recommended array power, up to 36A per MPPT and 200% PV oversizing for modern high‑power modules.
  • Strong battery and EPS capability – Max. 60A charge / discharge (30A × 2), rated EPS power 20000VA and 200% EPS overload for 10s with switchover time under 10ms.
  • Smart energy management – Built‑in shadow tracking, smart load management, ~0.3s load response time and VPP compatibility via OpenADR, IEEE 2030.5, FCAS and API.
  • Designed for harsh environments – IP66 enclosure, Type II SPD on AC and DC sides, optional AFCI and operating temperature from −35°C to +60°C with derating.

Where to use this inverter

X3‑Ultra 20.0kW is designed for three‑phase sites with significant solar and battery capacity, such as logistics depots, warehouses, manufacturing units and large commercial buildings. It suits applications where solar‑plus‑storage is used for peak‑shaving, backup for critical loads or microgrids with generator support.

Because it is a high‑voltage three‑phase hybrid inverter with parallel capability and advanced controls, installation and commissioning must be carried out by qualified electricians familiar with SolaX equipment and UK grid codes (including G99). Energian can help design complete systems and arrange installation via trusted UK partners.

Technical specifications 

PV input

  • Max. recommended PV array power: 40kWp (X3‑ULT‑20K).
  • Max. PV input voltage: 1000V DC (upper DC limit; higher voltage may damage the inverter).
  • Rated PV input voltage: 600V DC.
  • Operation voltage range: 120–950V DC (20kW group).
  • MPPT voltage range: 160–950V DC.
  • Start‑up voltage: 200V DC.
  • No. of MPPT trackers / strings per MPPT: 2 / (2 / 2).
  • Max. input current per MPPT: 36A / 36A.
  • Max. input short‑circuit current per MPPT: 45A / 45A.
  • PV oversizing: 200% PV oversizing with up to 110% AC output (series feature).

AC input & output (on‑grid)

  • Rated output power: 20000W.
  • Rated output current: 29.0A.
  • Max. output apparent power: 22000VA.
  • Max. output continuous current: 31.9A.
  • Rated AC voltage: 3 / N / PE, 220 / 380V AC; 3 / N / PE, 230 / 400V AC.
  • Max. AC input apparent power: 20000VA (for the 20kW group).
  • Max. AC input current: 29.0A.
  • Rated AC frequency: 50Hz / 60Hz.
  • Adjustable power factor range: ~1 (0.8 lagging to 0.8 leading).
  • THDi at rated power: < 3%.

Battery

  • Battery type: Lithium.
  • Battery voltage range: 120–800V DC.
  • Compatibility note: Compatible with a minimum of 3 HS Series batteries; if total voltage of the 3 batteries is less than 127V and there is no PV input, the system cannot start up.
  • Max. charge / discharge current: 60A DC (30A × 2 for dual ports).
  • Low voltage note: When battery voltage is below 180V, the inverter limits battery current to less than 20A.

EPS (off‑grid) output with battery

  • Rated EPS output voltage / frequency: 230V / 400V AC, 50Hz / 60Hz.
  • Rated EPS output power: 20000VA.
  • Peak EPS output power: 2 × rated power for 10s (i.e. up to 40000VA for 20kW).
  • Switchover time: < 10ms (UPS‑level).

Efficiency

  • Max. efficiency: 98.0%.
  • European efficiency: 97.7%.

Environment limits

  • Ingress protection: IP66.
  • Operation temperature range: −35°C to +60°C (derating above 45°C).
  • Max. operation altitude: 3000m.
  • Relative humidity: 0–100% RH (condensing).
  • Overvoltage category: Mains: III; Battery: II; PV: II.

General

  • Dimensions (W × H × D): 696 × 526 × 240mm.
  • Net weight: 47kg.
  • Cooling concept: Smart air cooling.
  • Communication interfaces: Meter (RS‑485), DI × 2, DO × 1, Modbus.
  • Power consumption (night): < 5W.
  • Topology: Non‑isolated.

Protection and certification

  • Certifications: VDE 4105, G99, AS 4777, EN 50549, CEI 0‑21, IEC 61727, PEA / MEA, NRS‑097‑2‑1, RD 1699, TOR.
  • Standard protections: Over / under voltage protection, DC reverse‑polarity protection, residual current detection, over‑temperature protection, DC isolation protection, grid monitoring, DC injection monitoring, back‑feed current monitoring.
  • Active anti‑islanding method: Frequency shift.
  • Surge protection: DC: Type II; AC: Type II.
  • Arc‑fault circuit interrupter (AFCI): Optional.

Documents available for download