The solar panels composed of 72 cells are 300w, 305w, 310w, 315w, 320w, 325w, 330w, 335w, 340w. This is currently the most popular style of Solarborn polycrystalline solar panels. We adhere to industry standards and solar panels are available. Quickly connect cables and work in series or parallel. Covering the world, 330w solar panels were often used in large-scale photovoltaic power plants in the past. Later, due to the relationship between price and output, most power stations gradually replaced polycrystalline with monocrystalline crystal.