Connecting to Third Party Holdover Battery Option This option uses an auxiliary battery provided by your vehicle manufacturer. It allows the user to maintain the temperature control of the compartment for a certain period when there is no alternator or stand-by power sources available. Some vehicle manufacturers include from factory option to equip a secondary battery of the same technology of the main battery (AGM) with an optional relay (KBAT) and a higher rating alternator to serve auxiliary equipment. Other Vehicle manufacturers may offer it as an option, installed by vehicle dealer. The holdover time will depend on the thermal losses ad the load conditions.
The energy is taken from a battery supplied with the vehicle. The Kbat signal is activated by the vehicle ECU that closes the contact when the engine has started. The Kbat opens when the engine has stopped allowing the E-200 equipment to drain only the secondary battery without compromising the start-up of the engine. TK 56881-18-IM-EN 23 1. Vehicle Secondary Battery 2. Fuse (150 A) 3. Ignition Switch