System Surge ProtectorThe ElectroMaax System Surge Protector provides protection to the alternator and DC electronics whenever a spike or surge occurs. Many cruisers, sailboat or power, are eagerly installing lithium batteries on their vessels today. The majority of lithium batteries have an internal BMS (battery management system) controlling them. The primary function of the BMS is to protect the battery, which is great, however due to the technology when the BMS senses