Absolutely possible and fairly easy to do.
Google Aquatherm or Fafco (Fafco may be less shipping to Az)
These systems run off the existing pool pump.
If you want to run the pump get ready for sticker shock it's gonna be expensive if you try to take the pump off grid.
I suggest an efficient, multi or variable speed pump & AC motor.
Install a solar Grid-Tie system and use the grid as your backup battery.
Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
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