alternator overload?

96terrano · 26-08-2013, 19:55

just been informed be the dad that if i ran a aux battery and a 12n system on my hyundai i'll fry the alternator.

is this true or the usual rubbish he tells me to stop me modding my vehicles?

will i need to fit a aux alternator to it?

edgerton19 · 26-08-2013, 20:49

Alternator will be fine they will only supply the rated current and no more, if you try and draw to much current the output voltage of the alternator will fall untill it can support the available current.

solarman216 · 26-08-2013, 20:54

Quote:

Originally Posted by 96terrano

just been informed be the dad that if i ran a aux battery and a 12n system on my hyundai i'll fry the alternator.

is this true or the usual rubbish he tells me to stop me modding my vehicles?

will i need to fit a aux alternator to it?

NO you will not damage your alternator just adding a 12n system, all you need to watch is the total load you will be adding in the form of accessories, if your alternator is rated at say 45 amps then find out find out how much your car will use at a max, that's wipers lights heater blower you name it, if that lot hits 45 amps then you will only have amps available for say your fridge if you reduce the car loading, even if you go over the top for a couple of hours it will not hurt your alternator it will still only put out 45 amps, the rest will come from your battery, Rick

96terrano · 26-08-2013, 20:59

Quote:

Originally Posted by edgerton19

Alternator will be fine they will only supply the rated current and no more, if you try and draw to much current the output voltage of the alternator will fall untill it can support the available current.

Quote:

Originally Posted by solarman216

NO you will not damage your alternator just adding a 12n system, all you need to watch is the total load you will be adding in the form of accessories, if your alternator is rated at say 45 amps then find out find out how much your car will use at a max, that's wipers lights heater blower you name it, if that lot hits 45 amps then you will only have amps available for say your fridge if you reduce the car loading, even if you go over the top for a couple of hours it will not hurt your alternator it will still only put out 45 amps, the rest will come from your battery, Rick

brilliant thanks for that

the alternator puts out 50AMPS i beleve, but the tings i'll be running won't be high amps....highest will probably be a pure sine wave inverter, the 2nd battery will be for the camping side of things, lighting etc

solarman216 · 26-08-2013, 21:18

What size inverter? Rick

96terrano · 26-08-2013, 23:37

Quote:

Originally Posted by solarman216

What size inverter? Rick

dunno yet, atleast 240V, 300Watt

solarman216 · 27-08-2013, 00:27

Ah OK low power then just for charging phone, maybe drill batteries (slow charge) laptop etc, Rick

26-08-2013, 19:55	#1
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	alternator overload? just been informed be the dad that if i ran a aux battery and a 12n system on my hyundai i'll fry the alternator. is this true or the usual rubbish he tells me to stop me modding my vehicles? will i need to fit a aux alternator to it?

26-08-2013, 21:18	#5
solarman216 Off road maniac Join Date: Dec 2009 Location: Bexhill on Sea Vehicle: Y60 Patrol Me, 3 ltr Mrs Posts: 17,431	What size inverter? Rick __________________ Ex banger racer now off road maniac Lokka on the front with manual hubs Diff lock on rear 3 inch SS straight through exhaust Manly winch bumper with 13000 lb winch 10 spike ground anchor, with multiple straps and blocks Super strong body cills capped with scaffold pole 20% stronger springs all round aggressive off road tyres on wheels so just swap. Aim to get stuck and be completely self sufficient in extraction, love getting muddy, 2ft deep is good but rare.

27-08-2013, 00:27	#7
solarman216 Off road maniac Join Date: Dec 2009 Location: Bexhill on Sea Vehicle: Y60 Patrol Me, 3 ltr Mrs Posts: 17,431	Ah OK low power then just for charging phone, maybe drill batteries (slow charge) laptop etc, Rick __________________ Ex banger racer now off road maniac Lokka on the front with manual hubs Diff lock on rear 3 inch SS straight through exhaust Manly winch bumper with 13000 lb winch 10 spike ground anchor, with multiple straps and blocks Super strong body cills capped with scaffold pole 20% stronger springs all round aggressive off road tyres on wheels so just swap. Aim to get stuck and be completely self sufficient in extraction, love getting muddy, 2ft deep is good but rare.

26-08-2013, 20:49	#2
edgerton19 Member Join Date: Jan 2011 Location: Yorkshire Vehicle: Terrano 3.0 SE Posts: 99	Alternator will be fine they will only supply the rated current and no more, if you try and draw to much current the output voltage of the alternator will fall untill it can support the available current.