What to upgrade for 1800 watts

[layzeepinoy23]

Got a pair of alpine type r , 2 sets of alpine coax, and 2 hifonics amps in trade for some labor and my girl decided she wants them in her car.

Question is, what would I need to upgrade in her van to support 1800 watts total; subs and mid/high (probably won't see that much but better safe than sorry). It has big 3 done in 4ga since I had some laying around and figured why not as well as the stock 130amp alternator.

[AI James]

maybe add a second battery.

and make sure you have great grounds

[layzeepinoy23]

maybe add a second battery.

and make sure you have great grounds

Hmm that's it? Sweet.

In that case would it be okay to use 4ga to go to the 2nd batt? I should have enough to do 2 runs pos neg today. If not then I'll just have to order up some 0ga.

Also, whats the smallest batt that would be acceptable, I'm sure bigger is better but not trying to put too much into this.

[bumonskateboard6]

maybe add a second battery.

and make sure you have great grounds

Hmm that's it? Sweet.

In that case would it be okay to use 4ga to go to the 2nd batt? I should have enough to do 2 runs pos neg today. If not then I'll just have to order up some 0ga.

Also, whats the smallest batt that would be acceptable, I'm sure bigger is better but not trying to put too much into this.

I'd wire the batteries in parallel with 0ga just so there's less resistance. As for battery I'd look at a D925 or D975 they're small but can back up a system pretty well.