Charging curves - Ionity and Gridserve

[Andreas]

I did back to back charging on Gridserve and Ionity twice yesterday, as an experiment, and because I was hoping Ionity would charge faster (it's also a bit cheaper for me). Today I checked the charge curves, and in both cases (only one set posted here), it appears to me that grid serve has a much more stable curve. The Gridserve charger is labeled a 60kW, the Ionity standard 350kW. Both at Beaconsfield, and as noted both charges within minutes of each other.

Any thoughts? Just thought it was interesting.

Vehicle is a Tour, could charge up to 125kW.

All the best

Andreas

[MotMot]

I notice Ionity was first - was your battery a wee bit cold perhaps?

[Andreas]

No sorry, just the way the pictures uploaded. Gridserve was first, and this was after driving ca. 60 miles at 70mph and with a preheated car (programmed departure but not on charger).

All the best

Andreas

[Deleted User 192]

Gridserve was at a lower starting SoC, go back and reverse the order in which you do them for a better comparison

[Andreas]

Gridserve was at a lower starting SoC, go back and reverse the order in which you do them for a better comparison

All fixed and added the other three curves for good measure.

Thoughts, observations?

All the best

Andreas

[Deleted User 192]

Gridserve was at a lower starting SoC, go back and reverse the order in which you do them for a better comparison

All fixed and added the other three curves for good measure.

Thoughts, observations?

All the best

Andreas

Nope, your Gridserve SoC start % are still lower in all the examples?

[Andreas]

As noted in the post, the order of charge was always Gridserve followed by Ionity. Chippenham the only one where I went for Ionity straight away as they were free when I got there.

From memory, even at lower SoC the Ionity curves always looked like this, and never as straight as the Gridserve ones.

All the best

Andreas

[Andreas]

Here's an Ionity charging curve from the summer that covers similar SoC ranges. It just isn't that stable. I could post others, but they never are. I'm just wondering if there is some control software difference in the charging unit, or what?

All the best

Andreas

[sidehaas]

The car's battery can only take a certain charge rate, which is not constant but reduces as a function of SoC. With Ionity, the available charger power is very high, so the charge rate you are seeing in that last curve is limited only by the car's battery. From what I've seen elsewhere (not having my own ID.3 yet) it looks completely normal. With Gridserve, in the SoC range shown above, the charge rate is limited by the 60kW charger, not by the car. That's why you have a fairly constant rate of ~60kW. If you continued charging with the Gridserve charger past 80% SoC it would become limited by the car and start to follow a similar path to the Ionity curve in that SoC range.