Timer starting prematurely

[backslashed]

Hello friends!

I have a question to more experienced folks about Timers. I have a General profile set to 80%, and a Timer set to 18:30. My charger output is 16kW. The car charged correctly to 80%, and stopped (on hold: blue status). Then, it started charging again towards 100% at 14:45. The car will likely be at 100% around 16:00, which is 2.5 hours early.

My question is: why did the car start charging towards 100% so early? Shouldn't it start as late as possible? As far as I know it's not good for the battery to stay at 100% too long. The way the car did it, it will sit at 100% for 3.5 hours. Surely that could've been shortened significantly.

Is this working as intended? What's the logic behind it?

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[W1NGE]

Hello friends!

I have a question to more experienced folks about Timers. I have a General profile set to 80%, and a Timer set to 18:30. My charger output is 16kW. The car charged correctly to 80%, and stopped (on hold: blue status). Then, it started charging again towards 100% at 14:45. The car will likely be at 100% around 16:00, which is 2.5 hours early.

My question is: why did the car start charging towards 100% so early? Shouldn't it start as late as possible? As far as I know it's not good for the battery to stay at 100% too long. The way the car did it, it will sit at 100% for 3.5 hours. Surely that could've been shortened significantly.

Is this working as intended? What's the logic behind it?

If you don't set a daily timer then on a single timer event the charging will pause for 30 mins and if you don't disconnect the EVSE the charging session will continue to 100%.

Therefore, set a daily timer (whether you charge daily or not) as the timer logic is to execute during the pre-defined period and then wait on the next timer event. If there is no next timer event (such as a daily or alternate days or whatever) then it will start charging to 100% after the 30 min pause.

 

[backslashed]

If you don't set a daily timer then on a single timer event the charging will pause for 30 mins and if you don't disconnect the EVSE the charging session will continue to 100%.

Therefore, set a daily timer (whether you charge daily or not) as the timer logic is to execute during the pre-defined period and then wait on the next timer event. If there is no next timer event (such as a daily or alternate days or whatever) then it will start charging to 100% after the 30 min pause.

Wow! That does not make much sense! Is this behaviour described anywhere? How do you know this? Trial and error? By setting a daily timer, do you mean to tick the "Repeat" box and choose every day of the week?

 

[W1NGE]

Wow! That does not make much sense! Is this behaviour described anywhere? How do you know this? Trial and error? By setting a daily timer, do you mean to tick the "Repeat" box and choose every day of the week?

It's in the manual.

I use a daily timer and a location based profile but don't charge every day.

Repeat - yes, but you can choose alternate days etc.

Timer / profile only performs it's task if the AC EVSE is connected.

I've been at this for over 2 years now so quite familiar with the logic.

 

[backslashed]

It's in the manual.

I use a daily timer and a location based profile but don't charge every day.

Repeat - yes, but you can choose alternate days etc.

Timer / profile only performs it's task if the AC EVSE is connected.

I've been at this for over 2 years now so quite familiar with the logic.

Thanks. I will try this out. However, I could not find any such information in the manual.

 

[W1NGE]

Thanks. I will try this out. However, I could not find any such information in the manual.

It is there...

 

[backslashed]

It is there...

Interesting. That is not clear at all. It says "if the timer has expired".Anyway, I will try it and report back.

 

[backslashed]

Coming back to report that the above is not true based on my experience. The timer starts as it should, but seems to plan to have the battery at 100% one hour or more ahead of the departure time, which is probably fine and is likely the better, safest option.

I tested this again on a very slow AC charger (regular plug - 2kW speed) and the charger was on hold for more than 14 hours, then started again 10 hours before my departure. Still a bit early, but not by more than 1.5h.

The manual entry above refers to expired timers.

 

[W1NGE]

Coming back to report that the above is not true based on my experience. The timer starts as it should, but seems to plan to have the battery at 100% one hour or more ahead of the departure time, which is probably fine and is likely the better, safest option.

I tested this again on a very slow AC charger (regular plug - 2kW speed) and the charger was on hold for more than 14 hours, then started again 10 hours before my departure. Still a bit early, but not by more than 1.5h.

The manual entry above refers to expired timers.

It refers to a single timer event.

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