![]() Due to this highly variable voltage VSRs are not suitable for use with 'smart' alternators.īattery-to-battery chargers are simple to install and will engage/disengage automatically on engine start/stop, ensuring the batteries are isolated and cannot discharge one another. These have a highly variable voltage output that is often too low to provide a charge or (in the case of regenerative braking systems) so high that it can damage some battery types. Using a battery-to-battery charger is the only reliable solution if you intend to re-charge a second battery in a modern vehicle that has an ECU-controlled 'smart' alternator (generally Euro 5/6 compliant engines onward).12 volt auto connectors are made to comply with a standard by. Current flow is limited by the charger's current rating, eliminating potentially damaging high in-rush currents and often allowing the use of smaller connecting cable than with VSR-based split charge systems. Most automobiles connect the negative terminal to the frame of the vehicle (negative ground).This provides a 100% re-charge for your leisure battery in a controlled way and typically achieves it faster than with direct alternator charging. VSRs simply allow charge to pass directly from the alternator to the auxiliary battery whereas Battery-To-Battery chargers take the alternator output and boost or reduce it to provide a stable voltage output according to a multi-stage charging profile. ![]() Direct alternator charging used in a traditional split charge system with a VSR will only achieve around an 80% charge state.They are installed in-line between the positive terminals of two batteries (one of which is connected to an alternator, typically a starter battery) and offer several benefits when compared with traditional split charge systems that utilise a Voltage Sensitive Relay (VSR) or heavy-duty, alternator-triggered relay. Battery-To-Battery chargers (also commonly know as DC-DC chargers) allow you to charge an auxiliary / leisure battery from your alternator whilst driving. Portable Car Battery Trickle ChargerNOCO GENIUS10 10 AMP Automatic Battery Charger and Maintainer Power Source: DC Output Voltage: 12V, 6V Chemistry: Lead. ![]()
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