A 4 kW on-grid solar power plant typically comprises 10-16 solar panels, each generating between 250 to 330 watts. These panels convert sunlight into DC electricity, which is then converted into AC electricity by an inverter. This AC electricity synchronizes with the grid and is fed directly into it, reducing reliance on conventional power sources. It's suitable for residential or small commercial applications, offering benefits such as reduced electricity bills, lower environmental impact, and support for grid stability.