The battery to battery charger is a product that has become increasingly popular in recent years. Like the alternator to battery charger, it guarantees optimal charging of the service batteries from the alternator and is very easy to install.
Some models provide voltage conversion, so it will be possible to recharge a 24V fleet such as the bow thruster from a 12 volt alternator or recharge a 12V service fleet directly from a 24V alternator. It should also be noted that battery chargers limit the current, this feature is useful to respect the charging constraints of lithium batteries or to limit the alternator output power and protect it from premature wear.
The new models also allow: