Here is the simple solar battery charger circuit designed to charge a 5 - battery using voltage regulator. It is very simple and inexpensive.
Instructions to build Solar Battery Charger
Ohio State University scientists have invented the world's first rechargeable solar battery. It's also more efficient and cheaper than current designs.
A comprehensive guide to the basics of off-grid power battery bank sizing. This is important because a too big or too small battery bank will have consequences.
Solar power is a great way to get electricity out to a remote project site.