The H3 Plus is Fox ESS’s largest three-phase hybrid inverter and AC charger, available in 50–125kW models. Built for complex commercial installations, it offers enhanced capacity, extended configuration options and robust three-phase performance for larger energy storage projects.
The inverter is compatible with stackable CQ batteries and features 3 battery inputs, allowing battery capacity to be scaled to over 723kWh per inverter. It can also be installed without batteries as a grid-tied, battery-ready inverter. For larger systems, the H3 Plus can be paralleled for scalability, with up to 10 units supported when using AI Link.
*Requires AI Link.
The H3 Plus is available in 50-125kW models, giving installers high-capacity three-phase inverter options for complex commercial energy storage installations.
Available in 50, 60, 75, 80, 100 and 125kW model options, with 4-8 x MPPT, 180V start-up, EPS function, 3 battery inputs and IP65 rating.*
Pair with compatible Fox ESS CQ batteries, including CQ7 and CQ16 options. With 3 battery inputs, battery capacity can be scaled to over 723kWh per inverter. The inverter can also be installed without batteries as a grid-tied, battery-ready inverter.
The H3 Plus can be installed with compatible stackable CQ batteries, or without batteries as a grid-tied, battery-ready inverter. Storage capacity depends on the selected battery range: CQ7 systems can range from 28.08kWh to 294.84kWh, while CQ16 systems can range from 64.28kWh to 723.15kWh.
*Some H3 Plus model options may not be available in the UK.
The H3 Plus is compatible with Fox ESS stackable CQ batteries, with CQ6 and CQ16 options available. With 3 battery inputs, battery capacity can be scaled to over 723kWh per inverter. It can also be installed without batteries as a grid-tied, battery-ready inverter.
The CQ16 is a modular-based storage solution developed for the H3 Plus to provide maximum scalability. With 3 battery inputs available on the H3 Plus, capacity can range from 4 x CQ16 at 64.28kWh to 45 x CQ16 at 723.15kWh. The CQ16 is an indoor battery with intelligent air cooling control.
| Battery Model | Minimum # Batteries | Maximum # Batteries | Capacity range |
| CQ7 | 4 x CQ7 | 42 x CQ7 across 3 stacks | 28.08 – 294.84kWh |
| CQ16 | 4 x CQ16 + 1 x BMS Box | 45 x CQ16 + 3 x BMS Boxes | 64.28 – 723.15kWh |
*Requires AI Link
Fox Cloud is your online command centre — giving you full visibility and control over your energy system from anywhere. With a clean, intuitive interface, it allows you to monitor real-time performance, review historical data, and adjust settings to suit your lifestyle or energy tariff.
Whether you’re fine-tuning your charge/discharge schedule, checking your battery health, or tracking solar generation, Fox Cloud makes managing your system simple and smart. It’s available via web browser and syncs seamlessly with the Fox ESS app, so you’re always connected — whether at home or on the go.
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