Electrical for 2kw?

[undeadxsunshine 10+ year member]

At the moment I have the big 3 done in 1/0, a stock 110 amp alt, and a 20aH batt in the rear. I'm pulling 1200w and not getting any dimming at all, I haven't seen the voltage drop below 13.78V.

I'd like to run an AQ2200d in the future, so what would I need for that? Can I just add another large batter? If so what size? I don't have an isolator, so idk how bad that is for my batteries considering I have the stock batt under the hood. What do you suggest? And I can't get a HO alt, besides the fact that I don't wanna spend the money on one, I doubt I can find one that will fit my car.

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[4OZGLOVES 10+ year member]

Add an extra battery in the back, I have a stock 75 amp alt in my subie and have ran upwards of 3.5k but had 4 125ah batts in the trunk.

 

[patotay 10+ year member]

At the moment I have the big 3 done in 1/0, a stock 110 amp alt, and a 20aH batt in the rear. I'm pulling 1200w and not getting any dimming at all, I haven't seen the voltage drop below 13.78V.
I'd like to run an AQ2200d in the future, so what would I need for that? Can I just add another large batter? If so what size? I don't have an isolator, so idk how bad that is for my batteries considering I have the stock batt under the hood. What do you suggest? And I can't get a HO alt, besides the fact that I don't wanna spend the money on one, I doubt I can find one that will fit my car.

just wanna ask,where are you seeing this?

 

[undeadxsunshine 10+ year member]

just wanna ask,where are you seeing this?

With multimeter hooked up at the battery in the rear.

 

[undeadxsunshine 10+ year member]

Would I be fine with just a 70ah battery in the back? Should I get a 70ah batt and keep the 20ah batt I have now also?