Powering a load through a small switch using N-Channel FET
If this is battery operated with no other ground connection, as you have indicated, it does not matter which side you switch. As such the circuit method you have indicated will work fine.

However, your resisters are far too small and the MOSFET chosen is under-sized and not driven hard enough.

You should bias the gate much closer to the Vgs MAX value. You also need to change the R's to Ks, that is, use 100K and 100K resistors for a Vgs Max of 20V. (Or whatever values gets you close to the max Vgs of your chosen MOSFET at the 36V supply.)

For short circuit protection, a simple fuse is probably your best bet.



If there are other ground connections you should use a topside PMOS transistor as shown below so the output is not live when the switch is off.







simulate this circuit &ndash; Schematic created using CircuitLab

Note at 7A you will need a MOSFET that has less than \$20m\Omega\$ on resistance at the chosen Vgs value or you will need heat sinking. The device you have chosen will dissipate over 5W at 7A, so chose again.

ADDITION

Since you mentioned hooking up a charger to this thing, it is prudent to add some gate protection for the MOSFET, so I added and 18V zener D2 to the schematic.