But in fact, static head still exists and affects the pressure at the VRV but simply does not add to total head with respect to the pump.
I don't understand this statement. Why doesn't the static head add to the total head loss with respect to the pump?
I can see how it is offset by the water's potential energy if the head loss from the panels back to the pool is equal to or greater than the height. However, it is not offset if the head loss from the panels back to the pool is less than the height