Household Energy Storage Systems Power Solution

The intelligent information age greatly increases electricity demand, which, in return, pressures people into seeking for green power generation due to the severe environmental pollution and energy consumption. Solar PV power generation is expected to alleviate the pressure. With the government’s policy support and less cost of power generation, energy storage systems are brought in tens of thousands of households. For the entire household energy storage system, MORNSUN provides a complete power solution to simplify customer’s design and increase the system’s reliability.

The household energy storage system is similar to a miniature energy storage power station, while its operation is free from the pressure of the utility. Battery pack in the system is self-charged during the trough period of using electricity, and discharges it during the peak period of using or powering off electricity. In addition to using it as an emergency power supply, the system is able to balance the electricity load, thereby saving household electricity cost.

Current market demand for household energy storage system more relies on the need for emergency power supply. However, in the eyes of professionals in the industry, the household energy storage system market is bright and promising. It combines a new energy power generation system, e.g. solar, and promotes the new energy on the other hand, contributing to building an intelligent power grid.

Structure and components of household energy storage system

Household energy storage system is currently divided into two kinds, grid-connected and off-grid.

Grid-connected household energy storage system is mixed-powered by solar and the energy storage system, including five parts: solar array, grid-connected inverter, BMS management system, battery pack and AC load. When the utility works normally, the solar grid-connected system and the utility together power the load. When the utility powers off, the energy storage system and the solar grid-connected system together power the load. The grid-connected household energy storage system is divided into three working modes. Model I, solar provides energy storage and powers the utility. Mode II, solar provides energy storage and powers part of residential electricity. Mode III, solar only provides energy storage.

Off-grid household energy storage system is independent, without any electrical connection to the grid. Therefore, the whole system does not need grid-connected inverter except PV inverter. The off-grid household energy storage system is also divided into three working modes. Model I, solar provides energy storage and powers residential electricity on sunny days. Mode II, solar and energy storage battery power residential electricity on cloudy days. Mode III, energy storage battery powers residential electricity at dusk and on rainy days.