Calculations to determine if my alternator/batteries can withstand my electronics?
Here's my setup:
2003 Mitsubishi Lancer OZ Rally
90amp OEM alternator
Kenwood deck - max current consumption 10A
400W monoblock amplifier
500W 4-channel amplifier
None of the above are installed yet as I am having to determine what kind of batteries I will get and whether or not an alternator upgrade is needed.
I would like to have one deep cycle/fast charging battery in the trunk in parallel to my starter battery separated by an isolator.
I am worried that my alternator will not be able to charge the batteries faster than they are being drained with all of the electronics mentioned.
How can I calculate/estimate whats needed so I can be a better prepared for when I install everything?