thank you all
closed
A voltage divider is used to reduce voltage, so that is not what you want. Further, as you noted, they are better suited for low-level signals rather than high power circuitry due to the power loss.
I'd look at some sort of switching boost regulator. I'm not terribly familiar with solar panels but there may be specific types of regulators designed to handle the varying output from the panel. Most boost regulators can handle a range of input voltage, but I'm just saying that solar is a specific application with specific characteristics that may need to be taken into account.
At any rate, 7.5V @ 8A input is 60W and 36V @ 2A output is 72W, so that's not going to happen, we can't get something for nothing. Plus, conversion circuitry will be less than 100% efficient. Check around, but 80% - 90% is probably more realistic. So that'd be 48-54W out, or 1.3 to 1.5A at 36V. Ohm's Law is your friend 
Those numbers won't work.
Power in needs to be >= Power out.
7.5V x 8A = 60W
36V x 2A = 72W
Then you need to look into DC/DC converters or Step-Up regulators or Boost regulators, different for same thing.
36V is an unusual output voltage, not too many commercial choices
http://www.mouser.com/Power/DC-DC-Converters/_/N-brvxe?P=1z0wdj3Z1yxt6q2
mecharobo:
i didnt mean 36/2 amerege exactly... i meant something that would step up the voltage and reduce the current.
But all we have to go on is what you actually say, how are we supposed to know what you mean?
You need something like this: http://www.ebay.com/itm/330917635786
mecharobo:
Grumpy_Mike:
mecharobo:
i didnt mean 36/2 amerege exactly... i meant something that would step up the voltage and reduce the current.But all we have to go on is what you actually say, how are we supposed to know what you mean?
ok i fixed it
No you haven't.
So you want 60W output from a 60W source.
As you have already been told this is not possible, try and think more like 80% efficent.
So when you have 60W input you can only have 48W output.
At 36V this equates to only 1.3A in round figures.
And 36V is an odd voltage - look for something that is more standard.
mecharobo:
thank you all
closed
The original post and subject line should not be removed in this way as it prevents someone in the future that has a similar question from finding the thread.
Occasionally I see [CLOSED] or [SOLVED] prepended to the subject line. This seems fine to me, although I don't know if this forum has a recommendation or convention regarding the practice.
I don't know if this forum has a recommendation or convention regarding the practice.
Yes it does, and it is not to delete the original post or in fact make many substantial changes to it, only perhaps to add code tags.
In fact he has deleted all his replies.
I have requested that the moderators reinstate the original question, we will see if they can.
In the meantime I can't see many people helping mecharobo again.
Your wish, Mike is my command.
Thread locked.
@mecharobe, don't ever do this again.
mecharobo ignored my advice, and deleted all his responses to this thread again.
mecharobo earned him/herself a timeout ban