Need some guidance on designing a cell for my car

[Trike]

I noticed a voltage drop at the cell vs. the power supply. I was getting 13.48v at the power supply and 12.45v at the cell. That seems like a significant drop. Have you noticed a similar voltage drop on your setup?

I'll start with the electrolyte flow. I currently have a 3/8" hose for the in/out ports. I have the reservoir about 1.5ft above the cell. The return hose from the cell is above the water line on the reservoir, so that should be ok. I can try going to a 1/2" in/out hose to see if it'll help.

[Helz_McFugly]

I use 3/8 ID hoses, no problems, and it sounds like everything is setup fine. About the current drop. I do get a current drop after my PWM. its 13.8 before and 12.8 after. I found that this is pretty normal and alot of people get the same thing when using a PWM. I was using 10awg wire and it was dropping to 11.8 to 12volts. I upped it to 4 awg and it went up to 12.8 volts. I think the pulsing off/on of the PWM lowers the voltage a little just as it lowers the amps.