FOXESS CQ6 Series: Modular High-Voltage Energy for Uncompromising Performance and Scalability
The FOXESS CQ6 battery storage system is the ideal high-end storage solution for modern homes, commercial businesses, and demanding photovoltaic projects. Thanks to the intelligent, modular design consisting of master and slave modules, the system can be flexibly scaled from 11.98 kWh up to 83.86 kWh capacity. With an impressive depth of discharge of 90% and a highly efficient plug-and-play stackable design, you can achieve a future-proof, durable, and extremely easy-to-install power supply.
Highlights of the FOXESS CQ6 Master Module (CQ6-M)
- Central system brain: As the higher-level BMS, the master module controls and monitors all connected cells of the entire storage tower, ensuring maximum system stability.
- Integrated LED status display: Equipped with a clear 6-way LED display on the master module for immediate and intuitive monitoring of the state of charge (SoC) and system status directly on the device.
- Robust CAN bus communication: Guarantees lightning-fast, continuous, and interference-free data exchange between the battery unit and your inverter.
- Automatic fire protection: An integrated physical fire protection feature ensures the highest level of safety during operation indoors or outdoors in an emergency.
Highlights of the FOXESS CQ6 Slave Module (CQ6-S)
- Safest LFP technology: Uses durable lithium iron phosphate (LiFePO4) cells, which guarantee maximum thermal safety, extreme cycle stability, and superior service life.
- Precise scaling in 5.99 kWh increments: Each slave module expands the system by exactly 5.99 kWh of nominal capacity, allowing your storage to be precisely adapted to your actual energy requirements.
- Outstanding efficiency: An excellent round-trip efficiency of over 95% ensures that valuable solar energy is stored highly efficiently and released again with almost no losses.
- Wireless plug-and-play installation: The modules are effortlessly stacked on top of each other. This minimizes wiring errors, saves valuable installation time, and ensures a clean, space-saving design.
Technical Specifications
Advantage for professionals: The FOXESS CQ6 series revolutionizes commercial and residential installations through its unmatched flexibility and resilience. The weatherproof IP65 protection rating allows for problem-free outdoor installation, while the optional integrated preheating function secures operation even in frosty temperatures down to -25°C. Thanks to the silent, fanless convection design and the stackable plug-and-play concept, specialist partners can install the high-voltage system flawlessly in record time and guarantee customers maximum self-sufficiency with up to 83.86 kWh capacity per tower.
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Frequently Asked Questions
What are the advantages of using a photovoltaic system from Terra Energy?
What are the advantages of using a photovoltaic system from Terra Energy?
With a PV solution, companies can reduce their energy costs, cut CO₂ emissions, and strengthen their corporate sustainability. Our partner solutions ensure performance, efficiency, and future-proofing in B2B applications.
What happens after I purchase a system? Is there support or maintenance?
What happens after I purchase a system? Is there support or maintenance?
Our service doesn't end with your purchase. We support you from delivery and commissioning to the long-term optimization of your system. Our technical support team is available to answer questions and can arrange specialized installation or maintenance partners if needed.
What shipping and delivery options do you offer?
What shipping and delivery options do you offer?
Within Germany, we generally offer free shipping for photovoltaic systems. For international deliveries or bulky components such as modules or mounting systems, we will individually prepare a shipping solution for you (e.g., pallet delivery, truck freight).
What payment methods are available to business customers?
What payment methods are available to business customers?
We offer various payment options for business customers, including prepayment and purchase on account. Simply contact our sales department.
How does Terra Energy support me in selecting and planning my PV solution?
How does Terra Energy support me in selecting and planning my PV solution?
We offer expert advice and customized planning, taking into account location, consumption, subsidies, and technology. Together, we will develop your optimal solution, from the initial concept to commissioning.
What brands and technologies do you carry?
What brands and technologies do you carry?
We work with leading manufacturers and brands in the photovoltaic and energy storage segments to offer you state-of-the-art technology with high quality and performance. Please feel free to ask us for specific manufacturer and product details for your project.



