I'm suggesting more like the following:
pool
|
New Pump
|
New Filter
|
SWCG
|
Tee-->To Solar Loop (below)
|
Valve
|
Tee<--From Solar Loop
|
Pool

Solar Loop:
Tee (To)
|
Solar Loop Pump (ground level)
|
Panels on roof
|
Tee (From)

I also suggest you to test the pump or pump combo to be sure you can pump water up to the roof.