direct drive solar systems

Direct drive solar system just means that the solar panel voltage closely matches the battery voltage that it is connected to. Very few parts are needed.

The 1.5 volt direct drive system. Below is most likely the cheapest solar system to build ever. Bare bone parts list for about $20.00. You still need hock up wire, board of some kind to hold the 4 solar cells. Most DIY will have this stuff laying around. .