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The lithium battery is a non-aqueous battery with lithium metal or lithium alloy as anode and cathode materials. Due to the highly active chemical properties of lithium metal, the processing, storage and use of lithium metal have high requirements for the environment. With the development of science and technology in this generation, lithium battery has become the mainstream of production.

All in all, the role of a household inverter​ is an electronic device that converts low-voltage (12 or 24 volts or 48 volts) direct current into 220 volt alternating current. Unlike the case where we usually rectify 220 volt AC power into DC power for use, the inverter has the opposite effect, hence the name.

The off grid inverters are used in independent systems. The photovoltaic array charges the battery, and the inverter uses the battery's DC voltage as its energy source. Generally, this kind of off grid inverter has no ability to touch the grid, so it does not need islanding effect protection function.

The inverter is an indispensable part of the AC photovoltaic power generation system. Due to various technical or policy reasons, it will take a long time to connect all independent photovoltaic AC power generation systems to the national unified power grid. Therefore, the market distinguishes photovoltaic inverters into two types: photovoltaic off grid inverter and photovoltaic grid connected inverter.

The lithium batteries are rechargeable batteries produced with lithium cobalt oxide as the main raw material. It is characterized by high energy conversion, high voltage per battery and high capacity (at the same volume). It is light and has no battery memory, which makes it the most environmentally friendly batteries at the moment.

The most basic function of the solar charge controller is to control the battery voltage and open the circuit, i.e. if the battery voltage rises to a certain level, it stops charging the battery. The old version of the controller closes the opening or closing of the control circuit mechanically and stops or starts the energy supplied from the power supply to the battery.