An energy storage inverter is an electronic device used to convert direct current into alternating current in order to export electrical energy to the grid. It provides efficient power conversion and can control current and voltage to meet specific application requirements.

Why choose to install an energy storage inverter?

Increase a higher proportion of self-use. During the day, the photovoltaic power is used by the load, and the excess power is stored in the battery; at night, the photovoltaic does not generate electricity, and the battery power is used by the load, so as to achieve the purpose of not using the grid or using less power from the grid.

When the power grid fails or the power grid is unstable, it can automatically switch to battery-powered mode. This switching time is very short (UPS effect), and the load can continue to be used.

The effect of two-way energy storage - photovoltaic can charge the battery, and the electricity from the same grid can also charge the battery (when the electricity cost is low); in this way, the battery can be used to adjust the peak and valley electricity price difference or as Backup power is available.

It can also be used under pure off-grid conditions to drive loads of a certain power size.

Working principle of inverter

An inverter is a DC to AC transformer. It is actually a voltage inversion process like a converter. The converter converts the AC voltage of the power grid into a stable 12V DC output, while the inverter converts the 12V DC voltage output by the Adapter into high-frequency, high-voltage AC power; both parts also use the commonly used pulse width. Modulation PWM technology.

Its core part is a PWM integrated controller, the Adapter uses UC3842, and the inverter uses TL5001 chip. The operating voltage range of TL5001 is 3.6~40V. It has an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low-voltage protection circuit and a short-circuit protection circuit inside.

Input interface part: The input part has 3 signals, 12V DC input VIN, working enable voltage ENB and Panel current control signal DIM. VIN is provided by the Adapter, and the ENB voltage is provided by the MCU on the motherboard. Its value is О or 3V. When ENB=O, the inverter does not work, and when ENB=3V, the inverter is in normal working condition; while the DIM voltage The variation range is provided by the motherboard between 0 and 5V. Different DIM values are fed back to the feedback terminal of the PWM controller. The current provided by the inverter to the load will also be different. The smaller the DIM value, the smaller the current output by the inverter. The bigger.

Voltage starting circuit: When ENB is high level, high voltage is output to light up the Panel's backlight tube. PWM controller: It has the following functions: internal reference voltage, error amplifier, oscillator and PWM, overvoltage protection, undervoltage protection, short circuit protection, and output transistor.

DC conversion: A voltage conversion circuit is composed of a MOS switching tube and an energy storage inductor. The input pulse is amplified by a push-pull amplifier and drives the MOS tube to perform switching actions, causing the DC voltage to charge and discharge the inductor, so that the inductor The other end can get AC voltage.

LC oscillation and output circuit: ensure the 1600V voltage required to start the lamp, and reduce the voltage to 800v after the lamp is started.

Output voltage feedback: When the load is working, the sampling voltage is fed back to stabilize the voltage output of the I inverter.