Wall-mounted household storage equipment 5000 (5 degrees) has the following product features: high-power, large-capacity pure sine wave output does not damage electrical appliances, supports simultaneous charging and discharging Integrated 5kW optical storage integrated bidirectional inverter and scalable lithium-ion battery module Multiple operation modes: off-grid, inverter linkage control, timed charging and discharging control It has perfect pure sine wave output such as overload, overtemperature, short circuit, undervoltage, and overvoltage protection, with high power factor, and supports 3300W direct charging of AC mains The battery capacity can be flexibly expanded up to 20kWh, which can meet the safety and grid connection certification of multiple countries