Battery Regenerators

Updated: Jan 16

A battery regenerator is a device that restores capacity to lead-acid batteries, extending their lifespan. They are also sold as as desulphators, rejuvenators, reconditioners, pulse chargers or pulse conditioning devices.

All battery cells are composed of chemical parts that constantly interact with each other to produce charge. The electrolyte in most wet-cell batteries is sulphuric acid diluted with distilled water. Inverter batteries are mostly wet-cell batteries. The terminals are the pure lead at the negative side and the lead oxide rods on the positive side.


Sulfate crystals can accumulate around the terminal plates of a wet cell battery and harden over time. Otherwise called sulfation, this reduces the overall capacity of the battery and output of the inverter or solar system that uses them. All lead acid batteries will accumulate sulfation in their lifetime as it is part of the natural chemical process of a battery. But, sulfation builds up and causes problems mostly when;

  • A battery is overcharged

  • A battery is stored above 75 degrees

  • A battery is stored without a full charge

  • And a battery is not in use for a long time.

A sulfated battery has higher electrical resistance than an unsulfated battery of identical construction. This means that sulfated battery will have lower current flow. For users, this means that the battery has failed. Sulfation is the primary cause of battery failure. Extreme cases of sulphation can render a battery unserviceable and put financial strains on the users of the system.

How Battery Regenerators Work

The lead sulfate layer can be dissolved back into solution by applying much higher voltages. Normally, running high voltage into a battery will cause it to rapidly heat and potentially cause it to explode. Battery conditioners use short pulses of high voltage, too short to cause significant current flow, but long enough to melt the accumulated sufate layer and dissolve it back into the electrolyte.