There are two types of solar panel kits available for purchase today. Grid-tied kits designed to provide power into the normal electrical grid from your home and off-grid kits designed to charge up battery banks. For the purposes of our list, we only reviewed off-grid kits, as that's what the vast. You have two types of solar cells to choose from with solar panels. These are monocrystalline and polycrystalline. Monocrystalline panels are made using a single silicon crystal. The mounting and connecting hardware on a solar kit includes the brackets, bolts, cables, connectors, and other parts that physically hold and connect your system. Depending on where and how you plan to mount your panels you may or may not be able to use the. There are currently two widely used types of charge controllers: PWM and MPPT. PWM, or pulse-width modulation charge controllers, are the older and somewhat less expensive.