should i get a 3rd batt (1 stock - 1 kinetik 600 ) 2kw

[audiolife 5,000+ posts]

Do all batteries charge the same? No If you have wet flooded cells they will charge harder than AGM type cells. If a battery is a heavier load than another to begin with and takes longer to charge there is a difference. An alternator in any 12v system though has to be powerful enough to maintain a charge, depending on the battery the charge maintained should be at least between 12.5 to 12.8 volts. Also in many situations it is difficult to get an alternator that puts out enough power not to mention enough power while it is hot (have seen many a high output alt lose 50 or more amps after it has gotten warmed up from a few hours of driving) To correctly build a system that will last it must have both a good alternator and battery/batteries. 2200 watt amp is alot of power 2200w/14.4v=152.77 amps draw if it were putting out 2200 watts and were 100% efficient which its not but at the sametime I doubt you will be drawing 152 amps often at all (more than likely between 70 to 130 to music)but at the same time the car itself is going to need power as well (40 to 60 amps constantly).

 

[sexy 10+ year member]

Do all batteries charge the same? No If you have wet flooded cells they will charge harder than AGM type cells. If a battery is a heavier load than another to begin with and takes longer to charge there is a difference. An alternator in any 12v system though has to be powerful enough to maintain a charge, depending on the battery the charge maintained should be at least between 12.5 to 12.8 volts. Also in many situations it is difficult to get an alternator that puts out enough power not to mention enough power while it is hot (have seen many a high output alt lose 50 or more amps after it has gotten warmed up from a few hours of driving) To correctly build a system that will last it must have both a good alternator and battery/batteries. 2200 watt amp is alot of power 2200w/14.4v=152.77 amps draw if it were putting out 2200 watts and were 100% efficient which its not but at the sametime I doubt you will be drawing 152 amps often at all (more than likely between 70 to 130 to music)but at the same time the car itself is going to need power as well (40 to 60 amps constantly).

Yes different types of batteries do charge differently and while mixing types may not destroy a battery it will make one less effective due to improper charge rate.

1. (more than likely between 70 to 130 to music)but at the same time the car itself is going to need power as well (40 to 60 amps constantly).

2. I agree with those numbers so when you add in the needs of the car you get 110 amps to 190amps on music. So a car with a hot 200 amp alt would still be a little under powered.

3. you had said that today’s amps are a lot more powerful I agree and some are power hogs. Bottom line to me is if you are drawing 120 amps on music in a car with a 110 amp alt it does not matter how many or what kind of battery/batteries you have except that adding more batteries will give you less to use while driving.

 

[audiolife 5,000+ posts]

Yes different types of batteries do charge differently and while mixing types may not destroy a battery it will make one less effective due to improper charge rate.
1. (more than likely between 70 to 130 to music)but at the same time the car itself is going to need power as well (40 to 60 amps constantly).

2. I agree with those numbers so when you add in the needs of the car you get 110 amps to 190amps on music. So a car with a hot 200 amp alt would still be a little under powered.

3. you had said that today’s amps are a lot more powerful I agree and some are power hogs. Bottom line to me is if you are drawing 120 amps on music in a car with a 110 amp alt it does not matter how many or what kind of battery/batteries you have except that adding more batteries will give you less to use while driving.

And if you are not covering your load while driving with a bad or wrong type battery you are asking for a dead battery and hot/overheated amplifiers sooner than later. Key point to what I said is maintain a charge of 12.8 on an agm battery or atleast 12.5 on a regular battery by not cranking up the system every minute you drive or simply charging it full every couple of days to every couple of weeks will give the average listener the capacity they need to listen to it longer loud with less chance of the amplifiers getting hot because you increase the window of the 12v to 12.6v range. Music is also dynamic and is not constant draw. I can remember back in the late 80's and early 90's people were still nuking stockish electrical systems (alts and batteries) with 500-1000 watts and just because an amp may be 30% more efficient does not mean you can automatically run 2000 watts of new amps on a 100 amp alt. In many cases those old amps were within 10 to 20% in efficiency at or near full power of the newer class D amps.

 

[MeMo2 10+ year member]

so is there any chance that i will damage either of my AGM. Acid Batt's

I don't want to risk i own a very complicated car. and it will cost me much if anything happened with the computer itself.

I never did a 2nd batt, but for now i have to because its over 2k system. and also i don't know how should i do it ?

Should i charge the AGM Batt before installing it ? or just install it and leave it to charge while the car is on. Plz advice.

I will be using one fuse between both batt's. should i use two.

 

[sexy 10+ year member]

i give up

 

[audiolife 5,000+ posts]

so is there any chance that i will damage either of my AGM. Acid Batt'sI don't want to risk i own a very complicated car. and it will cost me much if anything happened with the computer itself.

I would go with a smaller audio system if I felt that way and was so limited on what I could do.

I never did a 2nd batt, but for now i have to because its over 2k system. and also i don't know how should i do it ?

Should i charge the AGM Batt before installing it ? or just install it and leave it to charge while the car is on. Plz advice.

Yes you should charge it, but again you must be able to maintain a charge on the batteries via the alt. If it lags behind to long and gets run down that is bad for the alternator all the way around. State of charge voltage and voltage drop are not the same thing but a voltage drop under use does effect state of charge

I will be using one fuse between both batt's. should i use two.

use 2 1 within 18" of each battery

I replied in bold, With what you have now I wouldnt go much if any over 1400 watts IF it were me. And yes you should still check to be sure you are maintaining a good charge.