What this system is

Fox ESS G-Max 100kW All In One System 215kWh Storage (GM215kWh-100kW-2h) is a commercial and industrial energy storage system built around an all-in-one outdoor platform. The exact GM215kWh-100kW-2h variant combines a 215kWh battery system with 100kW rated output, integrated BMS, PCS, thermal management and site-ready control functions in one enclosure.

This is not a domestic battery and it is not a simple inverter plus external battery combination. It is a purpose-built C&I storage product intended for peak shaving, load shifting, PV-storage coordination, frequency-related operation and wider site energy management.

Who it suits

G-Max suits factories, logistics sites, farms, larger retail locations, energy-intensive commercial premises and C&I solar projects where the user needs meaningful energy storage capacity on site. It is especially useful where the commercial case depends on lowering demand charges, shifting energy use, improving site resilience or making better use of solar generation.

Key features and practical benefits

• 215kWh usable energy storage.
• 100kW rated output and 110kW peak output.
• All-in-one outdoor system architecture.
• Liquid cooling.
• 0 to 100% depth of discharge.
• At least 8000 cycles.
• Peak shaving, load shedding, PV-storage energy control and frequency regulation modes.
• Wi-Fi, 4G or 5G cloud connectivity.
• IP54 system enclosure and IP67 battery pack protection.
• Compartmentalised safety design.

The main practical benefit is deployment simplicity at a higher commercial scale. Instead of designing a battery bank, thermal control and PCS arrangement from separate elements, the buyer gets a standardised integrated system intended for faster site deployment and more controlled operating performance.

The second major benefit is commercial flexibility. G-Max is not restricted to one narrow storage use case. Peak shaving, load shifting and PV-storage coordination all make it commercially relevant across different tariff structures and site load profiles.

Technical detail that matters in practice

Fox ESS specifies the GM215kWh-100kW-2h with 215kWh usable storage and 100kW rated output, with peak output listed at 110kW. The system is described as a commercial and industrial energy storage system using an all-in-one design philosophy, integrating battery, intelligent BMS, high-performance PCS, safety system, smart distribution and heat dissipation management inside one standard container for outdoor application.

Fox also states that the system offers multiple operating modes including peak shaving, load shedding, PV-storage energy control and frequency regulation. Operating data can be transmitted to Fox ESS Cloud via Wi-Fi, 4G or 5G. The enclosure protection is listed as IP54, while the battery pack protection is IP67. Fox further references compartmentalised safety design, liquid cooling and support for parallel connection upgrades.

The physical size is listed at 1040 × 1500 × 2200mm, with total weight below 2500kg. Those figures matter because they underline the fact that this is a site asset rather than a wall-mounted accessory. Project planning, access and placement all need to be handled accordingly.

Installation and fitment considerations

GM215kWh-100kW-2h belongs in professionally specified C&I projects. It should be considered where the site has a defined business case for storage and where the electrical, structural and control strategy has been designed to support a 100kW class battery system. It is particularly attractive where the project wants factory-integrated thermal management and protection rather than a site-built arrangement.

Because the system is designed for outdoor deployment, IP54 enclosure protection and liquid cooling are important parts of the fitment story. They support more stable thermal performance and better environmental suitability than passive systems of comparable scale.

Why this variant may be the right choice

The G-Max GM215kWh-100kW-2h is the right Fox ESS choice when a site needs meaningful commercial storage in one preconfigured package. Compared with smaller building-level battery systems, it delivers far more usable energy and power. Compared with loose component-based designs, it offers a more standardised approach to installation and operation.

That makes it especially relevant for commercial solar-plus-storage projects, demand-charge reduction strategies and businesses that want to move from simple solar generation into broader on-site energy control.

FAQ