The hybrid system is and interesting idea. What I had initially imaging was a compressor consuming all the solar energy available and basically functioning as a solar ice maker. This would be paired with a hydronic air handler. Of-course the ice storage would need to be able to absorb all the power on the sunniest day beyond what is consumed by cooling during those hours. A couple tons of ice, perhaps about 500 gallons for a large system. With a hydronic system, zoned cooling could greatly reduce night time demand.
I don't see it working to well in the winter without supplemental heating since the solar power and heating needs peak at different times.
Also, an alternate use would be needed at times when HVAC demand is low. It would pair nicely with a geothermal system since it could be used to recharge the ground loop when not needed.
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