Author Options:

Can alternator create electricity IF yes can it generate 230 v and what size alternator would be required? Answered

Can a alternator create electricity IF yes can it generate 230 v and what size alternator would be required?

Would it be advisable to connect a transformer between a alternator and a battery?


I think this is how some ice cream vans produce power!! I have heard it's possible to do and glimpsed one too many years ago now to remember exactly what I saw...but I think I saw a generator connected to the vehicle (toyota coaster) motor...To power a soft serve ice cream machine usually requires a 10HP generator to operate smoothly...

Not sure if this is an on going thread. But what if there was a way to connect an electric motor to the alternator once it has been spun up (or prior to). Them some of the power generated from the alternator would continue to power the motor and letting any excess power continue to charge the battery. is that something that is possible and does this depend on the amount of energy that the electric motor consumes? If the motor is powerful enough to turn multiple Alternators at once would that resolve the issue? For Example, 1 electric motor turns 2 or more alternators the Electricty generated from one of the alternators would power the electric motor, and the other alternator would continuously charge a battery. which would continue to power whatever device or electronics that are involved. To start the motor a rechargable battery pack can be used.

Why don't you just tell us what you are trying to build, instead of asking cryptic-questions?
I am interested.


Once i have a working version i'll MOST gladly share it. But at this point in time i am collecting required info first, BUT it seems i end up with a little more questions every time.
I KNOW this all WILL help with what i have in mind, just need to know HOW i am going to get this WORKABLE and SAFELY as well!! :)

On top of it all, i work with a limited budged, so i'm collecting info, purchasing required material and TRYING to PLAN correctly BEFORE i start "building"

Do you intend to do HOW i am going to get this WORKABLE and SAFELY on your own?
If you ask narrow questions you will get narrow (or very vague) answers; there is a lot of knowledge that you may be missing out on by being quiet or protective about this thing.


In the past i have been shunt down by many around me about the concept idea i have (THIS being the main reason why i decided to do this on my own). I know that many have tried this, as the proof is all over youtube.

This is what i am trying to do, develop a sustainable power source to run a household from, seeing that we tend to experience a large number of power outages here in South Africa.

So with the use of powerful magnets i want to build magnet wheels as "source" to a alternator and so on.. and end with a safe and sustainable power source.

For the geyser i'll make use of a heat pump and attempt to run even this from this source. It may eventually take up some space, but not is not a train smash for me at this point. I just want to get it to work successfully.

Also i want to try and see if a aquaponic farming system can be run from this. IF this is possible, then one can develop self sustainable farming system. See where i'm going with the idea..?

There.... now you know why all the questions

What sort of farming, cash-crops or your own food?


Forget the magnets (it doesn't work)
Set up wind or solar or both, and charge some lead-acid batteries. Run a DC-AC inverter off the batteries. You can also charge the batteries from the mains, but should avoid this if you've got wind / sun.


Yes an alternator from a car produces electricity when spun. At the right RPS it will generate 12VDC to no more that about 15VDC. No it will never be able to generate 230VAC. You can use that 12v to 15v to keep a bank of batteries charged then use an inverter to convert the 12V from the battery to mains power (in your case 230VAC). The size alternator you need will depend on what your needs are. How many batteries will be in your battery bank? This is determined by how much power you want and how long it has to last. Also the amount of power you want will be determined by how big of an inverter you get. The larger the inverter and the more stuff you have plugged into it will drain the batteries faster. Then you gotta consider the source that is spinning the alternator and how much power you can get back into the batteries over the course of a day.

ok.. what if i use lets say.. 2 to 4 alternators producing 12vdc to 15vdc.. would it be sufficient to keep a battery pack of 8 to 10 deep cycle batteries charged and be able to have a continuous flow or supply of 230vdc.. providing i have the correct inverter in place.. for a lets say "normal" or perhaps a bit bigger sized household..?

Would a rectifier also be advisable at some point?

I'm mistaking the alternators produce AC so it will need to be rectified to DC. But yes an alternator per battery can keep it some what charged but an inverter powering even a small laptop may end up pulling more power than when the alternators are putting in. Also you gotta consider what your using to turn the alternators.

Start reading some instructables about setting up a solar power, wind powered or water powered energy source. They will all cover how to set up the batteries that these systems need to hold a charge and how to get things connected for household use.

An "Alternator" is just the name for a generator of AC.

A 12V alternator generates 12V, a 230V alternator 230V. The FREQUENCY depends on the shaft speed AND the voltage does too, so the "rated output volts" only happens at a certain shaft speed.

A CAR "alternator" has the electrical bits in it to make 12V DC, if you remove them you would have "naked" AC, but at a frequency dependent on the speed you spin it at - which isn't suitable for transformer, unless your speed controll is very good.

An alternator does generate electricity but requires a little bit of battery power to do so.

The size to generate 230 volts would be an alternator designed to generate 230 volts.

No, a transformer probably should not be connected between a battery and an alter.  A transformer won't pass dc from the battery to the alternator.  OR if you are trying to charge the battery with the alternator, if the alternator creates a/c then you need a transformer AND rectifier.  If the alter. creates dc then you need an alternator the correct size or a regulator.