MGS5 12V battery dead

[Shwd mae]

I think you are missing something.

To effectively smart charge ev energy needs to know five data points.

1, Current charge = 40%
2, Target charge = 80%
3, Ready time = 7am
4, Battery Capacity = 64kw (also via API)
5, Charger Charger rate = 7kw

1 & 2 are only available via the API. 3 to 5 are inputed in the Ev Energy App.

With all five data points EV Energy now knows it needs to give the car 25.6kw of energy before 7am and it works out the best way to do that based on their algorithm and type of charger being used.. 25.6kw / 7kw = around 3 1/2 hours charge time (fag packet as there is a little more to it all). So it will work out how best to do this depending on your tariff and grid demands before 7am. It will stop and start charging during this time. Nothing to do with the car. All driven by EV Energy. See my screenshots. At some point towards the end the car will say I am at 80% and will stop taking charge but that is the very final stage.

Without these five data points the smart charging only gets less smart. And if its not smart enough it could cost you money. It will still "work" but its not working to the best of its capability.

How else would it know when to effectively start charging ? It has to fall back on what info is only in the app which isn't much help. e.g. Battery Capacity = 64kw instead of 25.6kw it actually needs.

If I am missing something then please say so.

What you say above makes sense, with the five points. However, if the Ev app is set to smart charge AND the MG app is set to smart charge, a charge is only delivered at the times specified in the apps.
I only required a small charge yesterday evening (to see if everything worked) , and as you can see from my screenshot's the charge was only started at 12am (start of my cheap tariff) and finished by about 2am.
With all the hassle I have had with my 12v battery getting drained, I am obviously very hesitant to give access to my mg account, even as a secondary account, in case my battery problems return.

 

[emmrecs]

With all the hassle I have had with my 12v battery getting drained, I am obviously very hesitant to give access to my mg account, even as a secondary account, in case my battery problems return.

Agree 100%!

In addition, I previously posted that my car was plugged in at 10:40 this morning and had almost immediately started charging, which gave some credence to the point made by @dx4100 that the ev.energy app does not control when charging takes place, although it is set to Smart Charge and use predominantly cheap electricity (in my case, between 00:00 and 05:00). BUT, that first charge lasted just over 1 hour (using a mixture of solar and peak from the grid) and then stopped.

The ev.energy app is still "in control" (and I have seen it behave like this before) and will complete the charge to 100% in that overnight slot.

So no, I don't believe the ev.energy app needs to have any direct communication with the car via the MG iSmart app; the car itself communicates with the charger and that, in turn, feeds data to the ev.energy app.

 

[dx4100]

What you say above makes sense, with the five points. However, if the Ev app is set to smart charge AND the MG app is set to smart charge, a charge is only delivered at the times specified in the apps.
I only required a small charge yesterday evening (to see if everything worked) , and as you can see from my screenshot's the charge was only started at 12am (start of my cheap tariff) and finished by about 2am.
With all the hassle I have had with my 12v battery getting drained, I am obviously very hesitant to give access to my mg account, even as a secondary account, in case my battery problems return.

That isn't "smart charging"... That is schedule charging.... its also limiting your maximum possible charge to around 49kw (give or take). Which isn't a big problem most the time but it is a limit.

I know its under the smart charge features but your basically just pre setting a schedule. Thats not what most people recognise as "smart charging".

If it works for you then good stuff but I think we are looking at this from different positions. If you look at things like Octopus Intelligent Go - thats true smart charging and I regret not buying a charger compatible with it but the Ev Energy stuff isn't too far away. Schedule charging like this though isn't really smart charging.

 

[emmrecs]

I think we may have to agree to disagree!

 

[dx4100]

Agree 100%!

In addition, I previously posted that my car was plugged in at 10:40 this morning and had almost immediately started charging, which gave some credence to the point made by @dx4100 that the ev.energy app does not control when charging takes place, although it is set to Smart Charge and use predominantly cheap electricity (in my case, between 00:00 and 05:00). BUT, that first charge lasted just over 1 hour (using a mixture of solar and peak from the grid) and then stopped.

The ev.energy app is still "in control" (and I have seen it behave like this before) and will complete the charge to 100% in that overnight slot.

So no, I don't believe the ev.energy app needs to have any direct communication with the car via the MG iSmart app; the car itself communicates with the charger and that, in turn, feeds data to the ev.energy app.

I didn't say the ev energy app does not control when charging takes place. I said the opposite. If you are smart charging and you are not doing things like the previous poster has done and basically enforcing a schedule then the ev energy system will decide when to start and stop charging.

If you plugged in your car this morning can I ask what was the "ready by" time set too ? I presuming the next morning as thats the norm. If this is the case then what happened is what I would expect. The ev energy app has all day and night to decide when to best charge your car and thats what happened.

The information communicated between the car and the charger is fairly low level stuff like how much current can be drawn etc. It doesn't send detailed information like the state of charge etc.

Think about it. Why would they go to effort of API integrations if it wasn't required or provided benefit ?

 

[dx4100]

I think we may have to agree to disagree!

Yeah fair enough - I got the impression that might have to be the case earlier today. I am posting more for the benefit of others at this point who may read this later on