I'm currently working on making a boost converter to convert 7-18v output voltage of a solar panel to 18v DC. so the input of the boost converter is the solar panel.
i'm using Arduino UNO as a PID controller and i've already done the programming

MY PROBLEM: for choosing the components 1st i need to calculate the output current draw of the boost converter which i have no idea how.

how can i calculate the output current draw ? can somebody help me with this ? i've been searching the net for the answer for days and still got nothing


***the circuit schematic and the solar panel information are included in the attachments***

 

The "output current draw" would be the load you intend to power from the system?

 

The "output current draw" would be the load you intend to power from the system?

Well i think so...

 

When operating at max. efficiency -20W, with boost just going along for the ride, cuts Ws down to 18 @ 18V = 1 A. into a load of 18 ohms?

 

When operating at max. efficiency -20W, with boost just going along for the ride, cuts Ws down to 18 @ 18V = 1 A. into a load of 18 ohms?

Well the desired output V is 24V sry i couldnt edit the post , my bad...
And load is around 100 Ohms

 

Ok, so 24 volts into 100 Ohms is 240 mA, 5.76 Watts.

Ohms Law.

 

Ok, so 24 volts into 100 Ohms is 240 mA, 5.76 Watts.

Ohms Law.

So the Power of solar panel has nothing to do with the amount of output current ?

 

Output power is the function of the load.

Consider this:

What is the output power of a 9 volt battery?
ZERO - unless we place a load on the battery.

Of course the MAXIMUM output power is a more complex issue.

Start by defining what load your system needs to power.

 

Output power is the function of the load.

Consider this:

What is the output power of a 9 volt battery?
ZERO - unless we place a load on the battery.

Of course the MAXIMUM output power is a more complex issue.

Start by defining what load your system needs to power.

Aha ok thanks for the help

 

Your max. output is still limited to what SP can produce. @ a boosted 24v you can draw a max. 750 mA
under ideal conditions.