h/o alt question

[bsheltry55 10+ year member]

i plan on upgrading the Big 3 with 1/0 guage and throw and xtraa battery in the back. it will be in a 09 nissan xterra. my amp will be around 1800 rms my question is will that fry my stock alt?

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[audiolife 5,000+ posts]

General rule of thumb is add at least 70 amps of alt for every 1000 watts rms.

 

[reclessantics 10+ year member]

Whats the req/ rule for batteries? per 1000watts.

and how many amps should your alt be to push 2 batts or so?