Hoymiles HiBattery 4020 AC

The Hoymiles HiBattery 4020 AC is an AC-coupled plug-and-play residential energy storage unit with built-in 4.02kWh LiFePO4 battery, expandable up to 16.08kWh. It delivers a maximum output of 2500W with backup power transfer within 0.02s and IP66 protection, offering over 8000 charge cycles. Fully compatible with all inverters, it can be connected directly to a household socket without modifying your existing solar installation to store surplus solar power. Equipped with WiFi and Bluetooth, it supports AI time-of-use optimization via App to reduce electricity bills. It operates stably over a wide temperature range with comprehensive multi-layer safety protection and comes with a 10-year warranty, ideal for balcony solar and retrofitting existing PV systems.