I am not sure of the electric service interruptible or time of day for space conditioning that I need to use for the separate meter. I also need to know what outdoor temp to lockout the heat pump and furnace. I want to save the most money on my utility bills. I live in Sterling Heights Michigan. I use DTE FOR ELECTRIC and consumers energy for natural gas. I would love some help with this. 110000 BTU and 4 ton with a 5 ton indoor coil. 2453 square feet built with 2nd floor in 79 with sealed duct in basement. I also added r30 to ceilings for a total of r45. 2nd floor walls had r4 added for a total of r19 . 1st floor walls have a r 15.New = all Lennox new 98 furnace XP21, heat-pump,indoor cased coil pure air, power humidifier, I-comfort Wi-fi stat. It cost a bunch, now I have to choose electric service and set points.When it was charged they didn't use a weighed calculated charge they just used super heat or gages , they added 19 ounces and the instructions wanted 33 ounces then checked with super cool. Should I be concerned about efficiency with the 14 ounce discrepancy?