I have 6 x 500 farad super caps in series. I want to use them to smooth voltage dips in a 12v system that is powered by a DC-DC converter. Currently my application is a water pump (desalination) that builds pressure and releases it through a check valve, cycling like this every 3 or 4 seconds. As the load increases the voltage drops slightly, which slows the pump slightly, and over many hours would decrease the total output of the pump.
The DC-DC converter says it is "Suitable to buffer-charge a battery" Which makes me think it has some current limiting built in. But I have killed one before when I shorted the output, and i'm not keen to kill another one.
My intention is to put the cap bank in parallel close to the motor, with a 20 amp fuse and a large 0.5 ohm resistor inline with the positive cable coming from the Cap bank.
I will pre charge the caps, so as to limit the inrush anyway, but in a situation when they self discharge for some reason and they are cut off from the DC-DC converter I don't want them to turn the DC-DC converter inside out when I flip the switch.
As I say I REALLY don't want to kill my DC-DC converter, so I want to see what those in the know have to say about my plan.