It combines a 30kW-class PV inverter with battery charging and discharging, AC charging, grid management, remote monitoring, and EPS backup capability. Applications may include factories, warehouses, agricultural operations, large offices, commercial buildings, and high-consumption residences. Fox ESS describes the H3 PRO family as a 15–30kW range and positions it for flexible high-voltage storage.
Overview
The published H3 PRO features include three MPPTs, two strings per MPPT, 160V start-up, two battery inputs, IP65 protection, EPS functionality, and remote app or web monitoring. Fox ESS also describes more than 200% PV oversizing capability under applicable design conditions and parallel operation of up to ten units with AI Link. These features can make the 30kW model useful where a single inverter must manage a large PV field and a substantial storage bank. However, the exact 30kW electrical parameters, including maximum PV input, current limits, battery voltage, charge/discharge power, AC current, and EPS output, must be taken from the current datasheet. 3
A 30kW three-phase inverter can deliver significant daytime energy to a commercial load. If the building consumes power while the sun is available, the inverter can reduce grid purchases directly. Surplus solar can charge a compatible high-voltage battery for evening use, tariff management, or resilience. During an outage, the EPS output can support selected circuits if the battery contains sufficient energy and the loads remain within the inverter’s continuous and surge limits. The system should be commissioned with a clearly labelled essential-load board. Large motors, pumps, compressors, welders, lifts, and air-conditioning equipment need a starting-current review before they are included in backup operation.
Key features
The H3 PRO may also be used as a battery-ready grid-tied inverter before storage is installed. This can help a customer stage the project, but it does not provide backup until the battery, EPS wiring, changeover logic, protection, and commissioning are complete. High-voltage battery work requires trained personnel, correct DC isolation, approved connectors, BMS communications, cable routing, earthing, and service access.
IP65 protection supports an appropriate installation location, not uncontrolled outdoor exposure. In Pakistan, heat, dust, monsoon rain, salt air, and voltage variation should be considered. Remote monitoring can help manage a large installation, while the installer remains responsible for alarm response and maintenance. Confirm the exact H3 PRO 30kW revision, grid code, PV limits, battery list, EPS rating, parallel hardware, warranty, and commissioning scope before publication or sale.
Applications and compatibility
The 30kW rating describes instantaneous AC conversion capability; it does not specify runtime. Runtime depends on battery usable kWh, load kW, inverter losses, reserve settings, temperature, and the state of charge at the beginning of the outage. Conversely, installing a large battery does not permit more than the inverter’s approved power output.