FoxESS 27.84kWh CQ7 Energy Storage & 8kW Single Phase Hybrid Inverter (1p 8kW)

Product Description The FoxESS CQ7 Energy Storage System combined with the KH/KA Series 8kW Single Phase Hybrid Inverter is a high-voltage modular energy solution designed specifically for residential use. The system consists of the CQ7 series high-voltage battery pack (configurable capacity, supporting up to 27.84kWh) and the KH1-8.0 single-phase hybrid inverter, supporting intelligent management of PV generation, battery storage, and grid on-grid/off-grid switching. The CQ7 battery system features a modular stackable design, consisting of a Master control unit (CQM) and Slave expansion units (CQS), allowing for flexible capacity expansion. Paired with the 8kW hybrid inverter, the system enables PV energy storage, peak/off-peak tariff arbitrage, and emergency backup power during outages — ideal for residential users seeking high self-consumption rates. Founded in 2019, Fox ESS is a subsidiary of Tsingshan Holding Group (a Fortune Global 500 company), focusing on the R&D, production, and sales of inverters and lithium batteries. Key Features Energy Storage System (CQ7 Battery) Modular & Expandable: The CQ7 system consists of 1 Master unit (CQM) and up to 6 Slave units (CQS). Minimum configuration requires 2 units (1 CQM + 1 CQS), maximum supports 7 units (1 CQM + 6 CQS), with capacity ranging from 14.04kWh to 49.14kWh. Safe LiFePO₄ Technology: Uses high-safety Lithium Iron Phosphate (LiFePO₄) cells, offering excellent thermal stability and cycle life. High-Voltage Architecture: Recommended operating voltage of 300V DC, with a voltage range of 85-480V DC, compatible with modern high-voltage hybrid inverters. Deep Discharge Capability: Supports 90% Depth of Discharge (DoD), maximizing usable capacity. High Protection Rating: IP65 rating, suitable for both indoor and outdoor installation. Inverter (KH1-8.0 / 8kW Single Phase Hybrid) Hybrid Inverter Design: Supports intelligent coordination between PV, battery, grid, and loads. Can be configured as AC-coupled or DC-coupled; the battery storage system can be used independently even without PV panels. High Conversion Efficiency: Maximum efficiency of 97.8%, MPPT tracking efficiency of 99.9%. Multi-MPPT Design: Features 3 independent MPPT trackers (each MPPT connects to 1 PV string), adaptable to complex roof orientations. Wide Input Voltage Range: MPPT operating voltage range of 80-500V, startup voltage of 75V — low startup voltage extends daily power generation window. Advanced Battery Management: Built-in BMS communication interface (CAN/RS485), supports battery charge/discharge current of 50A each. Smart Monitoring: Remote monitoring and system management via Fox ESS mobile App or web portal (FoxCloud V2.0). IP65 Full Protection: Natural convection cooling, no internal fan — low noise and high reliability. EPS Emergency Backup: Supports Emergency Power Supply output in off-grid mode (requires EPS interface). Specifications CQ7 Battery System Specifications Specification Parameter Model CQ7 Series (CQM Master + CQS Expansion) Brand FoxESS (Fox-ess) Battery Type LiFePO₄ (Lithium Iron Phosphate) Single Module Energy Approx. 7.02 kWh Minimum Configuration Capacity 14.04 kWh (1 CQM + 1 CQS) Maximum Configuration Capacity 49.14 kWh (1 CQM + 6 CQS) Target Configuration Capacity 27.84 kWh (approx. 1 CQM + 3 CQS) Nominal Voltage Varies by configuration (high-voltage system) Battery Voltage Range 85-480V DC (matched to inverter) Recommended Operating Voltage 300V DC Max Charge/Discharge Current 50A each Operating Temperature (Charging) 0 ~ 55℃ Operating Temperature (Discharging) -10 ~ 55℃ Protection Rating IP65 Communication Protocols CAN / RS485 Installation Type Floor-standing, stackable Safety Certifications IEC 62109-1/2, IEC 62477-1, CE KH1-8.0 8kW Single Phase Hybrid Inverter Specifications Specification Parameter Model Fox ESS KH1-8.0 (KH/KA Series) Output Power 8,000 VA (rated) / 8,800 VA (max) Output Phase Single Phase Rated Grid Voltage 220/230/240V AC (range 180-270V) Rated Output Current 34.8A (max 38.3A) Max Recommended PV Input 12,000W DC Max PV Voltage 600V DC MPPT Voltage Range 80-500V DC Startup Voltage 75V DC Number of MPPT Trackers 3 (1 PV string per MPPT) Max Input Current per MPPT Approx. 18A Battery Type Lithium-ion (high-voltage battery) Battery Voltage Range 85-480V DC (recommended 300V DC) Max Charge/Discharge Current 50A each Maximum Efficiency 97.8% MPPT Efficiency 99.9% PV to Battery Efficiency 98.5% Battery to AC Efficiency 97.0% Protection Rating IP65 (indoor/outdoor installation) Cooling Method Natural convection (fanless) Communication Interfaces WiFi, RS485, DRM, USB, CT, optional 4G Battery Communication CAN / RS485 Dimensions (approx.) 380 × 440 × 167mm (varies slightly by model) Weight (approx.) 19-29kg (depending on model) Noise Level <30 dB Certifications IEC 62109-1/2, IEC 62477-1, EN 61000-6-1/-2/-3, G99 (UK grid) Installation Method Wall-mounted Warranty 10 years (based on available channel information)