Solar charger employs solar energy to supply electricity to devices or charge batteries. They are generally portable.
Solar chargers can charge lead acid or Ni-Cd battery bank up to 48 V & hundreds Ampere-Hours (up to 400AH) capacity. For such type of solar chargers, generally intelligent charge controllers are used. A series of solar cell array plates are installed separetly on roof top and can be connected to battery bank. Such arrangement can also be used in addition to mains supply chargers for energy saving during day times.
Most portable chargers can obtain energy from the sun only. Portable wind turbines are also sold. Some, including the Kinesis K3, can work either way.