Hi guys,

Been having trouble with my project.

Let say i have a solar panel rating 9V 70mA

I wanna to have a minimum voltage of 12V, so if i get two panels and connect in series i would get 9V + 9V = 18V, but will the current be added up?

Since in series connection, current is the same at every point, and since the solar panel wont be having the same intensity of sunlight, let say plate 1 generated 30mA, and plate 2 generated 20mA, will the current be 50mA? or just 20mA or 30mA?

thanks.

in your case, the maximum current output of the system is the cell with the lowest current output

so means that the current will be 20mA only? wow... thats a bad news

So have you try out your project?

You can try to connect it and using multimeter to check the current output. Provided your multimeter max amp tester not lower than your testing amp. ( will burn your multitester fuse or spoil it)

havent... because scare i might buy the wrong one as one plate cost quite a sum of money... no one tried this before huh? haih...

What you want to do? Or what thing you try to power up?

maximum current output is inl 20mA but if you connect it in paralel you can get 9V 40mA.

If you want 12V, design a switching regulator, connect 18V, 20mA, you should be able to get 25mA,12V at 85% efficiency.

my project need to power up 4LEDs which is around 12V. 12V plate is too big for my project, so thinking of using 9V and connect it in series to get higher voltage to power up the LEDs. seems like it is not realizable here?

This post has been edited by bagata: Nov 15 2010, 07:03 PM