Mk 3 Reg
The Mk3 Reg is produced by Manzanita Micro and used in with their line of MM-PFC Chargers in the PiPrius conversion kits. The regs communicate with the charger, and/or laptop, over an EVILbus network which gives them the ability to throttle back or turn off altogether the chargers current setting. The regs do so based on both over and under voltage events in order to keep each battery from being overcharged or overdischarged. The regs retain their original "regulating" function which allows each device to burn off excess power during the final stages of a charge to help keep the entire pack equalized. Such regulation allows the chargers to safely charge the battery pack at very high rates, usually limited by the available grid feed.
 Mk 3 Rudman Regulator
- Text from http://www.manzanitamicro.com/mk3reg.htm
Voltage controlled bypass regulator with digital interface.
Easy to use ASCII command structure.
Protect your advanced lead acid AGM batteries from over voltage conditions. Modern AGM type batteries fail to equalize their charging voltages when charged in a series string. A Rudman Regulator on each 12 volts battery or block of batteries will protect them from over voltage damage during the last phase of a charge cycle.
The easiest way to maintain a equal charge on any single battery during a charging cycle is to regulate it's voltage. If all the batteries in your series string are at the same voltage during the Float stage of charging, then they will be equalized as much as possible. AGM type batteries capacity vary during manufacture, and they tend to get out of equalization during use during heavy EV cycling. The first battery to "fill Up" has a higher resistance and then robs the other batteries of the charging current that they need to be totally charged. Then during discharge the same happens to the first battery to be completely empty. So some batteries get damaged from over voltage and thermal, and some get damaged from cell reversal and never fully charged. An AGM string has very little "give" to it while finish charging. A battery bypass regulator gives the string the "give" it needs to protect the first to get full, and to pass the unneeded power along to the batteries that still are charging.
More information available at the company homepage http://www.manzanitamicro.com