Answer
Apr 25, 2023 - 07:15 AM
You are experiencing the demands of gravity on the pump, for every 10 feet up you pump water you lose 4.5 psi of working pressure. Working at 40ft would mean that to get the same flow as you are accustomed to on the ground you the pump will need to pump at an added 18psi.
The pump controller will help to manage the pump, but it will not solve this pump needing more amps or overheating when working above 30 or 40 feet up, for that you need a pump with a higher psi rating.
What is happening here is this:
Most 12v Soft Wash operators are spraying at 45 to 50 psi at ground level which is close to the max 60 psi rating on that pump to start with, needing that additional 18psi has the pump running at max for an extended period.
This heats up the pump and that heat causes all 12v pumps to need more amps to perform at max pressure.
the Everflow pump you mention is rated at 17 amps max draw, but the manufacturer chart indicates that 17amps is at 50psi, The manufacturer mentions intermittent flow but does not provided a heat curve for when this pump will heat soak when pumping at max pressure continuously. us experience with pumps of similar construction suggests the pump will start to heat soak at 20 minutes of full pressure use, this will cause the pump to draw more amps and this is what is popping the recommended 20amp fuse.
There is a warning about pump pressure, but it is vague.
https://everflopump.com/product/ef5500-5-5-gpm-diaphragm-pump/
