I have released SmartGrid 4.2.0 to HPM. The main improvement over version 4.1.0 is a change in how the polling operates.
In version 4.2.0 the polling is stopped whenever the Applet is not visible such as when you minimize Chrome or switch to a different Tab. As soon as you switch back, polling starts again with an immediate check. I have tested this on Chrome on Windows, Android and iOS but it is using well supported calls so it should work on any modern browser.
The impact has meant a huge reduction in the Hubitat app usage stats for instances of SmartGrid. In my own case the reduction is in excess of 90% but it will depend on how you use it. There is also a corresponding decrease in the CPU use of the host platform.
This will be my last feature update for a few weeks as I'm going to be gone next week, but I do have some new features planned for over the summer.
As always happy to receive your feedback.