Warranty 5 years CTEK 8 STAGE CHARGING Step 1 Desulphation A sulphated battery has an increased internal resistance. This step detects this and uses pulses to reduce this sulphation. Benefits The useful life of the battery is extended. The user is alerted that the battery operates on reduced capacity, which avoids unexpected battery failures. Step 2 Soft Start A battery with very low voltage could be indication of permanent defects of the battery (cell short, battery not accepting charge). The Soft Start step checks if the battery accepts charge. Benefits Batteries that won't operate properly are identified. These units should be replaced, to guarantee safe operation of the system. Step 3 Bulk Charge All available current is used to recharge the battery as fast as possible up to about 80% State of Charge. Benefits The recharge time is minimized, by using max power when the battery can accept it. Step 4 Absorption The voltage is kept at its maximum with the current tapering off. This step lasts until the current is measured to be at a level when the battery is fully charged. Benefits The battery will be fully charged in the shortest possible time. Step 5 Analysis The charge process is stopped completely during some minutes, to check if the battery can hold the charge. Benefits A faulty battery can’t hold charge. These units are identified so that they could be taken out of service. Step 6 Recondition Modern batteries with low water loss often experience an uneven acid weight (stratification). This step increased the voltage to start internal gassing, that mixes the acid and reduces/eliminates the stratification. The current is reduced, to control the gassing, and the time is computer controlled to decide for how long the Recond should last. Benefits Stratification will cause sulphation and grid corrosion, which will reduce battery capacity and expected battery life. The Recond step regains expected battery performance. Step 7 Float maintenance The battery is maintained at 100% capacity for a maximum of 10 days. If the battery is not used the unit switches to pulse maintenance. Benefits The battery is kept at 100% State of Charge, which maximizes battery performance. Step 8 Pulse maintenance The charger monitors the battery voltage without charging. When the voltage drops below a threshold, then the charger re-starts with a pulse of energy to keep the battery at almost 100% State of Charge. Benefits The battery is kept at almost 100% State of Charge with minimized water loss, which maximizes expected battery life. BATTERY PRODUCTS | CTEK 27 M018_4-35_p1.indd 27 06/03/2018 15:45