Question: can you charge lithium ion battery with solar panel?
Answer: Like batteries, solar cells can be connected in series and parallel to get higher voltages and currents. ... Note that 2.40V/cell for lead acid and 4.20V/cell for lithium-ion are the full-charge voltage thresholds. Charge controllers are also available for lithium-ion to charge 10.8V packs (3 cells in series).