Cutoff Voltage – Definition, Glossary, Details – Solar Mango

The voltage levels  at which the charge controller disconnects the photovoltaic array from the battery or the load from the battery. Solar charge controller allows the user to set a cut-off voltage, so that the battery charging is stopped when the battery reaches that voltage. This is to protect the Lead Acid  battery as they will be damaged if overcharged, or their voltage is pushed too high by continuing to charge with a high charge voltage.