The answer is no, off grid solar power plant require batteries to store electricity. If the grid power isn't available and batteries are out of equation too.
[pdf] It has developed more than 20 series of photovoltaic inverter products such as grid-connected and energy storage, with a power coverage of 0.7-250kW, fully meeting the needs of household, cargo, industrial and commercial and large power stations, and has built multiple industrial bases such as Suzhou and Anhui, forming a large-scale industrial cluster.
[pdf] There are three main types: stand-alone inverters which supply power off-grid, grid-connected inverters which are most common, and bimodal inverters which can operate on- or off-grid.
[pdf] String inverters convert DC power from “strings” of PV modules to AC and are designed to be modular and scalable. Smaller string inverters may have as few as one input, with one PV string per input.
[pdf] You'll generally need an inverter that's 75% as big as your solar panel system's kilowatt-peak (kWp), which is how much solar energy it produces at standard test conditions.
[pdf] .
To address this, solar inverters use some form of energy storage to buffer the panel's power during those zero-crossing periods. When the voltage of the AC goes above the voltage in the storage, it is dumped into. .
Functionally, solar inverters mainly serve to convert DC electricity produced by solar photovoltaic arrays into AC electricity; while energy storage inverters possess additional functions over solar inverters,. .
The main difference with energy storage inverters is that they are capable of two-way power conversion – from DC to AC, and vice versa. It’s this switch between currents that enables energy storage inverters to.
[pdf] 
