Stock alternator.

[vsynergy 10+ year member]

Just had a quick question--is my stock 100a alternator good for 1500 rms?

I'm planning to do the big 3, upgrade my starter battery to a Kinetik 1800 and run 1/0 gauge.

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[starkfu 10+ year member]

depends on what else your car is using the amperage for.

the amperage rating on an alternator is the only factory, if you are running 20 hydraulic pumps, a plow, and towing a trailer, then a 100 amp alternator isn't going to be sufficient.

But if you are driving a hyundai without AC, then 100 amps is enough to run quite a bit.

 

[shavenblazer 10+ year member]

It want last for long my sundown killed mine.

 

[andytb 10+ year member]

i had a 3000 rms on stock alternator and 1 batt the alt didnt die but did drop to 9 volts back in the day before i knew better

 

[vsynergy 10+ year member]

The car's a Lexus LS400. I never use AC and don't tow stuff either.

 

[SW9152 10+ year member]

itll work all right but you are going to start losing voltage after like 2 mins and after like 10min you will prolly be under 10v. thats only if you are playing it at maximum volume, if you are driving your car and at like half volume youll be a fine all day. also remember stock alts dont make hardly anything at idle. i used to run 1650wrms amp that was 80% efficient off a the stock 95a alt in my 93 ford explorer and that is kinda what happened to me. i would bump the music loud for a song or 2 and then turn it down for a couple and let the voltage pick back up a little.

 

[tRidiot 10+ year member]

I have run my stock 90A alt for years with just a strong aftermarket battery and 2000W+ systems.

Is it ideal? No. Has it worked? Thus far, yes.

 

[SW9152 10+ year member]

also when i put my system in my explorer it had the original alt with 230,000 mi on it and i just replaced it 2 weeks ago at 252,000mi.