60 cells panels are polycrystallines or monocrystallines. Are destined to solar applications, for On-grid, but also for Off-grid, and thanks to best price per watt, are most often used. In stand-alone applications, using this panels requires that using MPPT controllers is mandatory.
Attention to purchasing second-hand solar panels!!! These come from photovoltaic parks of high power, being replaced, on a period of time, because performance loss.