Reduced Flow Rate When Running Through Solar Panels

coopgraphic

Member
Nov 28, 2019
23
Northern Ohio
Hi, I just invested in a Pentair solar controller and while it is being shipped, I changed the plumbing from my pump to get ready to install it. When I did a manual test run, my flow rate dropped dramatically. Before, the flow into the pool was almost as strong as a hot tub jet. I couldn't even adjust the direction of the eyeball if the pump was running. Now, when its running through my solar panels (4 - 2' x 20' panels) its still pushing out water but at about a quarter of what it used to be. Is this okay? I'm concerned about damaging the pump. I've attached a diagram that shows how I plumbed everything.

Thanks in advance.

-Chris
 

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JamesW

TFP Expert
Mar 2, 2011
19,826
Why do you have two pumps?

Intex pumps are not very strong. Do you have a head curve for the intex pump?

How high are the solar panels?
 

coopgraphic

Member
Nov 28, 2019
23
Northern Ohio
I've attached a diagram that shows how I have my solar panels plumbed. The panels are 4' off the ground on the high side and about 1' off the ground on the low side. The intake for the solar panels is at the same level as the intake to the pool. I no longer run two pumps. I had that on my old setup and it didn't work that well. I'll change that in my signature. (I kept wondering how JamesW knew that I once had 2 pumps. LOL) Oddly enough, today I turned it back on and my filter pressure was at about 18 psi, and the flow was much better...probably coming out at half if not 2/3 of what it is without the panels being on. Maybe some air was stuck in the panels?
 

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coopgraphic

Member
Nov 28, 2019
23
Northern Ohio
Never thought of doing them parallel. Does anyone have any pictures of how they plumbed theirs in parallel? I'm going to look at mine tomorrow and start drawing out how I could do it but some existing setup photos may help.