Bulk Solar Charge Controller Products Description 聽聽 Can I use 24 volt solar panels to charge 12 volt batteries through MPPT controller? 聽 Yes, you could do it. The voltage isn't too much of a concern, it is the current the panel can provide. What is commonly known as a 12V panel is usually a 36-cell module with an open-circuit voltage of 22V, making maximum power at 18V. 聽聽 Can you oversize a...