Fox ESS H3/AC3 Three-Phase Hybrid Inverter (5kW–12kW)

Installed from £1,700.00

  • Three-phase hybrid & AC inverters from 5kW to 12kW output
  • Compatible with high-voltage lithium-ion batteries
  • Up to 98.5% charge and 97% discharge efficiency
  • IP65-rated, natural or fan-cooled for outdoor installation
  • Expandable — supports parallel operation and scalable battery storage
  • Remote monitoring via FoxCloud V2.0 (WiFi, LAN, 4G)

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Fox ESS H3/AC3 Hybrid Inverter — Three-Phase Solar + Storage with Unmatched Flexibility

The Fox ESS H3 and AC3 Series offer a powerful and scalable hybrid inverter platform for three-phase residential and light commercial applications. Ranging from 5kW to 12kW, these inverters deliver top-tier performance, battery integration, and future-proof expandability — all in an IP65-rated chassis designed for long-term durability.

Why Choose H3 or AC3?

  • Hybrid & AC options: Choose full hybrid (H3) or AC retrofit (AC3) models depending on your project.
  • High battery efficiency: Achieve up to 98.5% charge and 97% discharge performance.
  • Flexible battery support: Compatible with Fox LFP high-voltage batteries from 180–600V.
  • Expandable & parallel-ready: Scale up with up to 10 units in parallel and up to 18 batteries in series.
  • Comprehensive safety: Includes AFCI (optional), surge protection, insulation detection, and more.

Reliable, Grid-Tied or Backup-Ready

Designed with on-grid and EPS backup support, the H3/AC3 Series includes up to 4 MPPT trackers and a maximum 1000V DC input voltage range for advanced PV design flexibility. Integrated fuse protection, smart BMS comms, and remote diagnostics reduce install time and simplify O&M.

Remote Monitoring with FoxCloud V2.0

Access real-time performance and smart alerts via the FoxCloud web portal or mobile app. Whether managing one site or ten, H3/AC3 delivers dependable visibility and control across your network.

Who is it for?

  • Installers and EPCs designing three-phase solar + storage solutions
  • Commercial clients needing robust backup and parallel scalability
  • Homes or small businesses seeking battery-ready energy control with premium efficiency

Technical Specifications

Model H3-5.0 H3-6.0 H3-8.0 H3-10.0 H3-12.0
Rated Output Power 5000W 6000W 8000W 10000W 12000W
Max PV Input Power 10000W 12000W 16000W 20000W 24000W
Battery Voltage Range 180V – 600V
Max Battery Charge/Discharge 26A
Max Efficiency 97.2% 97.2% 97.3% 97.3% 97.3%
Max Battery Charge Efficiency 98.5%
Max Battery Discharge Efficiency 97%
MPPTs / Strings 1 / 1 1 / 1 2 / 1 2 / 1 2 / 1
EPS Backup Yes (≤20 ms switch time)
Dimensions (W × H × D) 449 × 519 × 198 mm
Weight 28 kg
Cooling Natural & fan-assisted (model dependent)
IP Rating IP65
Certifications EN62109, EN50549, G98/G99, CEI 0-21, VDE-AR-N 4105

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