Solax X1-VAST-8K 8.0kW HV Single Phase Hybrid Inverter IP66

  
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Solax X1-VAST-8K 8.0kW HV Single Phase Hybrid Inverter

  • 8kW high‑voltage single phase hybrid inverter for flexible solar and battery storage on UK commercial and industrial sites.
  • Dual battery ports with 2‑in‑1 function and microgrid/backup modes to support whole‑building loads without extra hardware.
  • High efficiency, IP66 weather protection and smart energy features for reliable long‑term operation and simple management.

Brief description

The Solax X1‑VAST‑8K is a single‑phase high‑voltage hybrid inverter rated at 8.0kW AC output, designed to work with PV arrays and compatible batteries in a flexible storage system. It provides grid‑connected, off‑grid and backup (EPS) operation in one unit, with dual battery inputs and microgrid and generator modes to suit complex sites.

With 16000Wp maximum PV input power, four MPPT trackers, 200% oversizing capability and a low PV start‑up voltage of 40V, it makes good use of available roof or ground‑mount PV, even under mixed string layouts and low‑light conditions. Protection, smart scheduling and V2G/V2H readiness support safe operation and future‑ready integration.

Key features

  • 8kW single phase hybrid inverter – Nominal AC output power 8000W and EPS off‑grid rated power 8000VA for single‑phase commercial and industrial loads.
  • Flexible high‑voltage PV and battery inputs – Max. PV input 16000Wp, four MPPTs, dual battery ports and 2‑in‑1 function for scaling storage and generation.
  • Smart energy and VPP‑ready – V2G/V2H ready, with support for Smart Schedule, Scene and TOU, plus VPP interfaces including FCAS, IEEE 2030.5 and OpenADR.
  • Strong protection and reliability – 10s 200% EPS output with ≤10ms switch time, SPD Type II on DC and AC, optional AFCI, IP66 enclosure and comprehensive electrical protections.
  • Simple installation and wiring – Functional wiring cover, additional ports for simplified cabling, wireless meter compatibility and pocket WiFi + LAN options.

Where to use this inverter

The X1‑VAST‑8K suits small commercial buildings, logistics depots, workshops and light industrial sites that need single‑phase hybrid operation with battery storage. It is appropriate for behind‑the‑meter solar storage systems, peak‑shaving, backup for critical loads and microgrid applications on sites with compatible generation and storage.

Because it is a high‑voltage hybrid inverter with grid‑connected and EPS functions, installation and commissioning must be carried out by qualified electricians familiar with Solax equipment and UK regulations such as G99. Energian can help specify complete systems and arrange installation via trusted UK partners.

Technical specifications 

Input PV

  • Max. PV input power: 16000Wp (X1‑VAST‑8K).
  • Max. DC voltage: 600V.
  • Nominal DC operating voltage: 360V.
  • No. of MPPT trackers / Strings per MPPT tracker: 4 / 1 (X1‑VAST‑8K).
  • Max. input current per MPPT: 20A / 20A / 20A / 20A (X1‑VAST‑8K row).
  • Max. short‑circuit current per MPPT: 25A / 25A / 25A / 25A (X1‑VAST‑8K row).
  • MPPT operating voltage range: 40–560V.
  • Start output voltage: 50V.
  • PV oversizing and input capacity: 200% PV oversizing and power input capacity (feature statement).

Output / Input AC (grid‑connected)

  • Rated grid voltage (AC voltage range): 220 / 230 / 240V.
  • Rated grid frequency: 50 / 60Hz.
  • Nominal AC output power: 8000W (X1‑VAST‑8K).
  • Max. apparent AC output power: 8000VA (X1‑VAST‑8K).
  • Max. AC output current: 34.8A (X1‑VAST‑8K).
  • Max. apparent AC input power: 14500VA.
  • Max. AC input current: 43.5A.
  • Displacement power factor: 0.8 leading to 0.8 lagging.
  • Total harmonic distortion (THDi, rated power): < 2%.

EPS (off‑grid or backup) output

  • Off‑grid nominal voltage; frequency: 230V; 50 / 60Hz.
  • Off‑grid rated power: 8000VA (X1‑VAST‑8K).
  • Off‑grid rated current: 34.8A (X1‑VAST‑8K).
  • Off‑grid peak power: 2 times off‑grid rated power, 10s.
  • Total harmonic distortion (THDv, linear load): < 2%.
  • Switch time: ≤10ms UPS level switch time (feature), < 6ms stated in table.

Battery

  • Battery voltage range: 360–480V.
  • Max. charge / discharge current: 30A.
  • Dual battery ports: Dual battery ports and 2‑in‑1 function for expansion (feature statement).
  • Communication interface (battery): CAN.

V2G / V2H and smart energy

  • Smart energy features: V2G/V2H ready for smart home energy integration.
  • Management functions: Smart Schedule, Scene and TOU.
  • VPP readiness: VPP ready, supporting FCAS, IEEE 2030.5 and OpenADR.
  • Meter options: Wireless meter compatible for convenient setup.

Efficiency

  • Max. MPPT efficiency: 99.9%.
  • Max. efficiency: 97.6%.
  • Max. battery charge/discharge efficiency: 97.0%.

Protection

  • Anti‑islanding protection: Yes.
  • DC reverse polarity protection: Yes.
  • Insulation monitoring: Yes.
  • Residual current monitoring: Yes.
  • AC overcurrent protection: Yes.
  • AC short‑circuit protection: Yes.
  • AC overvoltage protection: Yes.
  • Over‑heat protection: Yes.
  • Surge protection: Type II, DC and AC.
  • Battery reverse charging from grid: Yes.
  • AFCI: Optional.

General data

  • IP class: IP66.
  • Operating temperature range: −35 to +60°C (derate at 45°C).
  • Humidity: 4–100% (condensing).
  • Altitude: < 3000m.
  • Typical noise emission: < 35dB.
  • Cooling concept: Natural convection.
  • Topology: Transformerless.
  • Communication: CT, meter (optional), external control RS485, pocket WiFi + LAN (optional Pocket WiFi 3.0 / Pocket WiFi 4G), DRM, USB upgrade.
  • Dimensions (W × H × D): 590 × 400 × 180mm.
  • Net weight: 30 ± 2kg.

Standards and certification

  • Safety: EN / IEC 62109‑1 / ‑2.
  • EMC: EN 61000‑6‑1 / ‑2 / ‑3 / ‑4; EN 61000‑3‑2 / ‑3 / ‑11 / ‑12.
  • Certification (grid and country codes): AS / NZS 4777, G99, EN 50549‑10, BR140, IEC 61727, IEC 61683, RD1699, NRS 097‑2‑1, PEA / MEA, VFR2019.
  • Notes: Max. input voltage is upper DC limit; exceeding operating voltage range may trigger inverter protection.

Documents available for download

Shipping and support

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 20 8064 0335 or info@energian.co.uk for a quotation.

UK expert support is available – contact us with any questions or support requests via phone, email or live chat, or visit our office for an in‑person consultation about Solax X1‑VAST hybrid inverters and wider commercial and industrial energy solutions.