J's originally installed 8 facing West even though I tried to get them to do as many as they could on the S. side. They fought it all the way.
They then added 2 on the West side and 2 on the S. side and we split the cost.
Solar Trek in Ocala then added 4 more on the S side, corrected water flow piping and adjusted the sensor to the S. side etc.
So to answer your question; 16 panels and now all is well.
J's fought the S. side because it was more labor and piping to go to the other end of the house after bidding the job.
So it cost me 2X as much as it should have.
Could be worse.
My neighbor had the same experience; bigger pool; same house but has 36 panels on the N. side and still has to use propane!
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