Whats the max amount of amp pull before there is a noticeable strain on the battery & alternator?

Im currently running 3 Hella Lights on the front bumper of my tacoma, each 55W x 3 = 165W (14amp) and 2 KC flood lights on the side of my truck, each 55W x 2 = 110W (9amp)
So far I have no issues with this configuration on my stock battery. Im thinking of adding two more KC flood lights (55W each) Will my stock battery and alternator be able to handle two more lights or do I have to go bigger battery and alternator?

 

It'll probly be fine. I would just hook then up and see after. If there's a huge strain on system, you may need a h.o. alt. But adding that little bit more should be just fine as it won't be that big of a strain. If you were adding a big led bar then maybe. And it won't hurt to run it like that a little bit until you can upgrade. Just be careful with the use if so. At most you'll experience a strain on engine performance and flickering/dimming lights. Especially if you have a subwoofer/high powered amp.

 

Do you have the tow package? If so, you have a 130 amp alternator as opposed to the standard 100 amp. That will help you.

 

I currently drive a 2011 Toyota Tacoma Sport DBL Cab 4x4 V6 4.0L Engine. It does come with a toe package.

 

So think of it this way: the same truck with a 100A alternator is just fine, so you have (easily) 30A of headroom, probably more since the 100 will leave you room too.

I'd look at the battery voltage while you are running everything and driving. You should be around 14V.

 

LED lights are A LOT less load on the electrical system compared to the halogens he is using.

 

That's why I said "if", and a "big" led bar And they pull more than you think when added up. My 42" and 20" pulls 380 watts at 31 amps. And I experience issues with just those on as well as my subwoofer going... Plus I've got more lights than that. I'm running 550+ watts @ ~45 amps. Again plus my sub. Even with a good battery AND a ho alt @180peak/120 idle, it sometimes struggles at idle with the stereo bumping.. All depends on your setup. And how many amps it'll take before she can't put out any more to keep up.