Tony, given your very small footprint an external display and select switch in a small box might be the way to go. you only need a ground, 5V power, and the 2 I2C connections.
As an aside, I have been using the OpenEVSE RTC to charge at night and it works well with my B . I feel that using it this way I can use all 40A on my 100A panel. Other drains late at night should be minimal.