What is the expected voltage drop from a diode isolator when measuring at the battery terminals, if multiple batteries are connected in parallel?

The expected voltage drop from a diode isolator when measuring at the battery terminals, especially with multiple batteries connected in parallel, is approximately 0.7 Volts. This value is characteristic of silicon diodes, which are commonly used in isolator applications.

When diodes are in the circuit, they have a forward voltage drop due to their semiconductor properties. Silicon diodes typically exhibit a forward voltage drop ranging from 0.6 to 0.7 volts when conducting current. This voltage drop occurs because the diode needs a certain amount of energy to allow current to pass through, resulting in a loss in voltage across the diode.

The context of measuring at the battery terminals highlights the significance of this drop, as it can affect the overall voltage that is available to the load. In systems where multiple batteries are connected in parallel, this voltage drop remains relatively consistent, as each diode in an isolator or connection will exhibit this forward voltage drop when it is active, ultimately leading to the expected measurement at the battery terminals.