Possible to add dual-battery and amp option after the fact?

Trämör

7.3L > 6.7L
Joined
Sep 13, 2020
Messages
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Location
All over the United S. of A.
Current Rides #1
F250 Tremor
Current Rides #2
BMW M4 Competition Convertible
As above, is it possible to add the dual battery/397amp alternator option after the fact? Is this recommended or not good?
 
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