Final answer:
The truth of the statement about the battery charger supplying power regardless of BATT switch position depends on the electrical design of the specific system and cannot be confirmed without more information.
Step-by-step explanation:
The statement that regardless of BATT switch position, the battery charger supplies charging power to the battery anytime the right 115 VAC bus is energized is a specific scenario that may not always be true. It varies depending on the electrical design of the system in question. In general, a car battery charger is designed to reverse the direction of current through a battery, which replenishes its chemical potential as depicted in the various figures provided. However, the condition stated in the question relates to an aircraft's electrical system where power distribution and battery charging might have additional safeties and controls.
For a battery to be charged, the charger must supply a voltage greater than the electromotive force (emf) of the battery. Even though a charger can reverse the battery's chemical reactions to recharge it, whether charging happens with any switch position and solely with an energized 115 VAC bus would depend on the actual electrical system's design. Not all systems may allow for charging to take place under any circumstances; there may be switch positions that disconnect the charger regardless of bus voltage. Therefore, without a specific aircraft or system reference, the absolute truth of this statement cannot be confirmed.