Single-phase anti-reverse-current photovoltaic energy storage inverter

What is a string inverter?

String inverters consist of power switches such as insulated gate bipolar transistors (IGBTs). This kind of power device has issues such as tail current and diode reverse recovery, which lead to high switching losses. Furthermore, these phenomena are affected by temperature, leading to higher power losses, especially for static-cooled solutions.

What is a 10kW single-phase inverter based on a GaN device?

A 10kW single-phase reference design based on GaN devices Figure 3 is a schematic representation of the converter. DC/DC Boost with MPPT1 Input range: 50-500V ISC: 18A Max. DC current: 14A Figure 3. Single-phase string inverter reference design block diagram Two boost converters for two independent string inputs, each 5kW rated (134kHz).

How efficient is a string inverter?

With an overall system efficiency close to 98% and a power density of 2.3kW/L, the string inverter reference design demonstrates great performance. In addition, the implementation of an integrated gate-driver solution could lead to cost reductions when considering the total system cost.

Are microinverters accelerating demand for energy storage systems?

Energy sustainability and security concerns are accelerating demand for energy storage systems, particularly in residential solar installations. There are microinverters with integrated energy storage systems on the market with power as high as 2kW.

What is a hybrid string inverter?

A common regulated DC bus interconnects the fundamental blocks. A hybrid string inverter comprises these subblocks: A unidirectional DC/DC converter for performing maximum power-point tracking. A bidirectional DC/DC converter for charging and discharging the battery. The battery makes it possible to provide power at night or during an outage.