We had a Bryant inverter driven 2 ton heat pump installed last summer and enjoyed it this winter.
Climate zone 3C (95062).
1263 SF house.
20k Manual J.
Design temp is 34F (coastal California).
Bryant 38MARBQ24AA3 with 40MUAAQ24XA3 air handler.

When it is in the low 30s, our heat pump seems to be running nonstop (great). My expectation was that the inverter driven technology would ramp the equipment down to 25% give or take and then just hum away.

This is sort of happening. The heat pump certainly is “running” all the time but when I look at my Emporia energy monitor it is ramping up and down every 5 minutes. The fan is still on during the low energy use times, but at lower speed.

Is this just what I should expect with a 2 ton system? Ideally perhaps I should have gone 1.5 ton with supplemental heat perhaps?

The heat pump is tied to a Byrant branded Ecobee thermostat and controlled by a 5 wire. I was told this is correctly done (and the Bryant installation manual confirms this is the correct way to set up the equipment given the thermostat) but it cause me to question things.

Thanks.