I started using this gadget because still not sure if I should leave charger plugged once it reaches 100%, now I just look at how long charge will take and can shut it off from anywhere using the app. Also I can leave it plugged when i'm not around and turn it on if I plan on riding soon and I'm not there when it needs charging.
https://www.amazon.com/dp/B07X52W1J8?psc=1&ref=ppx_yo2ov_dt_b_product_details
I don’t think leaving the charger plugged in after charging is compleat has any negatives but it’s my understanding that charging constantly to 100% is detrimental to the battery & should be avoided.
I installed a duel timer (4 hr spring wound & electronic timer set @ 3 hr) so I can charge up to 7 hr timed or un-interrupted/continual (pre selected via selected switch).
Timer(s) & selected switch are crammed into a plastic water resistant box slightly larger then
2”x4” & permanently mounted to bike as is it’s output into the bikes socket via a 90° plug.
I store the 6’ cord in the shock mount/frame tube after installing a 2” ABS pipe (custom cut/glued) so all I have to do is pull out the cord/plug into the wall & twist the timer (as well as select the addition of 3 hrs if needed).
Let us know how well this device holds up as I was considering something like this before I chose to go the route I took.
I use 10%/hr to determine how long to set timer(s) & shoot for 70%.
My system is nice for its ease of independent use but on rare occasions it would be nice to remotely start a charge top off cycle.
Also the components I used have a 20 amp rating & connections can be accessed to inspect & re-tighten if/as needed.