The Ontario Solar Charge Controller Guide: What It Does, MPPT vs PWM, and Why Skipping It Destroys Your Battery
A solar charge controller regulates voltage from your panels to your battery, and without one the battery dies within weeks. Even a single 100W panel pushes 24.3V open-circuit voltage into a 12V battery continuously. That unregulated voltage holds the battery above 14.8V for hours, boiling off electrolyte and destroying capacity. The solar charge controller prevents









