The so-called "household energy storage system" means "household energy storage + distributed solar photovoltaic ". In residents' homes, the households are powered by new energy power generation equipment such as solar energy. And the electricity is managed at the same time. The excess electricity is stored and supplied to the grid.
If the electricity is stored, the household solar energy system can improve the self-generate self-consumption rate. Part of the electricity generated by the solar system is used by household loads such as lighting, refrigerators, TVs, etc., and most of the remaining electricity is sent to the grid. If the more photovoltaic power generation on the roof of the home is used by oneself, the less electricity will be fed into the grid during the day. If the photovoltaic power generated by the rooftop photovoltaic during the day can be used at night, then less power will be bought from the grid at night.
Household solar energy storage system have shown good economic benefits in terms of peak shaving and valley filling, saving electricity expenses, and delaying the expansion and upgrading of power transmission and distribution. Household energy storage system in Europe is growing rapidly. In 2020, about 140,000 household energy storage system were installed in Europe. And the installed capacity in just one year reached 1,072 MWh, a year-on-year increase of 44%.
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