what size alt.as far as amp. should i get to run off road lights. i have 2 sets of 100 watters 1 set of 55 watters.&plan 2 add 1 more set of 100's

 

Assuming 1 set means 2 lights -
2 sets of 100 watts = 400 watts
1 set of 55 watts = 110 watts
1 additional set of 100 watts = 200 watts

Watts equals volts times amps for direct-current systems such as on cars.

You have added or will be adding a total of 710 watts of auxiliary lighting. 710 / 12 = about 60 amps. Son! That's a lot of juice.

If you plan on using these lamps while also using all the other electrical draws such as headlights, A/C, perhaps an aftermarket stereo with amplifier - suggest to get something in the 100+ amp range - the bigger the better.

Also consider than you may need to upgrade some wiring - particularly between the alternator and the battery, and the battery to the accessory post(s) where you'll be pulling all this auxiliary power from. Consider the use of proper fusing and wire sizes to prevent unexpected meltdowns.

If you plan on blazing these lights at a 'gathering' for extended periods - perhaps should consider a 2nd battery with isolator.

 

iraggi alternator
mechman alternators
dc power alternators
stinger alternators
ohio generator
excessive amperage alternators

GREAT alts, great price, get a nice HO and never have any other problems

 

well thank ya that helps 04 4x4 4.6 amp 12'' sub cat back single thottle spacer cold air i call it my redneck work truck!!!