I don't know if my solar company made a promise they can't keep. They told me 2 PW will support whole house with HVAC. House is already very energy efficient, lets say just a couple of small electronics on during the day and AC running. I want the AC to work so they recommended a sure start be installed, they installed it but not correctly compressor fan would only run at half speed. Contacted Hyper Engineering and they confirmed it is wired correctly now. What happens is the compressor (Carrier 3 ton 134LRA single stage scroll compressor) outside runs than after 2-3 mins just shuts off than starts again a 2-5 mins later. There is no fault code on the sure start (SS1B16-32SN). The fan in the house continues to run while the compressor has shut off. I called a dozen HVAC experts and none of them are familiar with sure start modules. Hyper Engineering thinks it is a compatibility issue with inherent controls of the AC unit and suggested calling an HVAC expert. Has anyone had success with 2 PW and a sure start on their HVAC working properly? Any tips or advice is appreciated.