Supercapacitors (often called ultracapacitors ... a bunch of lithium batteries at different voltages, a 40 W 18 V solar panel, and possibly other things like old laptop power supplies.

Furthermore, the research team developed an energy storage device that combines silicon solar cells with supercapacitors, creating a system capable of storing solar energy and utilizing it in real ...

The heart of the new power system is a pair of supercapacitors totalling 250 ... The caps are charged by a 12 V solar panel; this means that quite a bit of power is dissipated in the protection ...