What is the difference between photovoltaic grid-connected inverter and off-grid inverter? What are the advantages of hybrid inverter?

Grid-connected inverter directly transmits energy to the power grid, so it is equivalent to a current source, tracking the frequency and phase of the power grid. Of course, some inverters now claim to have low voltage ride-through capability and can be used for PQ regulation.

Off-grid inverter is equivalent to building an independent small power grid, which mainly controls its own voltage and belongs to voltage source.

Grid-connected inverter does not need energy storage, but the energy cannot be adjusted. How much photovoltaic power is sent to the internet, no matter whether people want it or not. The grid doesn't like it.

Off-grid generally requires energy storage and does not transmit energy to the Internet. Power grid has no right to interfere.

There is no clear concept of hybrid inverter, but there are two kinds of inverters, energy storage inverter and grid-connected inverter, which have the ability to accept regulation. I hope the grid can receive it. After all, the photovoltaic industry needs their support.