The Power Pak Voltage reading fluctuates when operating heavy duty loads from the Power Pak. Is this normal?
Yes, a fluctuating reading is normal. If you monitor the current and voltage in a battery-based DC system, you will see that current and voltage appear inversely related. The higher current flow from the battery, the more the voltage will naturally drop. This is because of the drop in Electromotive Force when a load is placed on a battery. Electromotive Force (Voltage) is the amount of “push” behind electrical current flow. Think of the battery as a steam kettle. The heat of the water represents the battery state of charge, and the steam pressure represents the voltage. The heat and pressure are directly linked. As the temperature (state of charge) rises, so does the steam pressure (voltage) within the kettle. When a load is placed on the battery, it is like opening a valve through which the steam flows, and naturally the steam pressure (voltage) inside the kettle will drop and the heat is reduced in the kettle.
