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Re: How Do You limit charging to 80%???

Posted: Fri Aug 04, 2017 6:59 pm
by specialgreen
If you leave for work at a consistent time, you could set the charger to end charging an hour _after_ you actually expect to leave. Then, when you unplug the car and drive off, it will be 1 hour short of full charge. (That said, if you're driving off right away, there's little harm in charging to 100%).

If you use the trickle charger, you could plug it into a timed outlet (which is rated for 15 amps), and program the outlet to power off 1 hour earlier than when the car is programmed to finish charging.

If you DIY home automation, there are relays which can disconnect 50A, driven by a Raspberry Pi, or similar. You could also connect at ammeter to a Pi and try to detect when the current draw starts to decline. But obviously, that's for pros.

Re: How Do You limit charging to 80%???

Posted: Fri Aug 04, 2017 8:48 pm
by LeftieBiker
If you leave for work at a consistent time, you could set the charger to end charging an hour _after_ you actually expect to leave. Then, when you unplug the car and drive off, it will be 1 hour short of full charge.


The charge estimate on the dash is generally pessimistic, and the timer seems to use the same algorithm. Setting the timer for one hour after actual departure time might yield a charge surprisingly close to 100%, although as noted this isn't a problem if the car is used shortly thereafter.

Re: How Do You limit charging to 80%???

Posted: Tue Jul 10, 2018 12:33 am
by KraigSchultz
I built a timer box for $60 of materials. It works great. We just set the timer based on what's needed to get to 80 percent. Much easier and less hassle than working with the Connect App or the onboard timer for a car that isn't driven every day. We plug it in one hour before leaving to get the last 20 percent on the day it will be driven.

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