Search the net for royer converter.

Thanks, yes I know, but how must I calculate the induction coil?

There are some peoples working on this issue but currently have
not found any usefull infos about the calculation of the inductor.

From a parallal forum I have goten the info to use this product
http://www.spulen.com/shop/product_info.php?products_id=1159
to build the induction coils

I like to get arround 300 Watt output per inductor ...

I have bought one on ebay but I do not know, how to change it for
the use in 24V systems which is realy great idea exspecialy in
Iran where we have very much solarpower.

Thanks in Advance
Kayham

It is not possible to convert a commercial induction stove to 24V.

Try this: http://www.eg-solar.de/english/home.htm

This solarcoocker is not what we need, because we have enought 
Energy-Storage for several weeks available du to a Gel-Battery 
manufacturer here in the city in northern Iran.

For the 230V Induction Cooking Stove:

I know, but I was about to figure out how it works...

OK, NOW I know, I have the need for 2 primary coils of 6-9 rounds
but I do not know the size of the copper (mm²) and then the inductor
which is in between to two coils.

Thanks
Kayham

Maybe it would be easier to buy a inverter to use the battery voltage 
and convert it to 230V for a domestic induction cooker?

> I like to get arround 300 Watt output per inductor ...
> I have bought one on ebay but I do not know, how to change it for
> the use in 24V systems which is realy great idea exspecialy in
> Iran where we have very much solarpower.
You and your circuit must be able to handle (al least) 13 Amps at 24V to 
get 300W. And: 300W isn't very much power for cooking...

> but I do not know the size of the copper (mm²)
As you must handle high currents: the more the better.

> because we have enought Energy-Storage for several weeks available du
> to a Gel-Battery manufacturer here in the city in northern Iran.
So take 10 x 24V and you have 240VDC and a farily small current of 1.3 
amp.

Right and I have gotten the idea from another thread, because
if I use the normal induction cooking stove it has always
2000 watt and more, even if I have not much to cook.

So, spliting the inductors into smaller parts could be the
soulution which I wan to try out.

Have a nice week
Kayham