EVCS with Phase Switching - Always falls back to 1P when Car drops current for short time

Hi,

some Cars seem to tend to drop charge current every some minutes for a very short time.

So then the following behaviour occurs:

When charging with fixed setting, indepent if 1P or 3P, everything is fine. EVCS works perfectly with using Sun Energy and controls amperage to get the best result.

But when using automatic Phase switching, this works great until car drops current:

  • It starts with 1P and goes up with current
  • Switches to 3P and charges with indreasing current
  • Until the car drops current for some seconds: This leads EVCS to switch back to 1P…
  • 1P current is then increased again, switching to 3P and so on…

Can there be a timeout set for switching back from 3P to 1P? So that EVCS ignores the short current drop of Car?

best regards,
Daniel

Which version of EVCS supports phase switching? I have been putting off purchasing one because I thought it does not have that feature (+RCD).

All Versions of EVCS, you just have to change the contactor inside. Search for it here in the Boards, there is a description.

Hello @Broesel . Thanks for reporting. Noted. It will be included in the upcoming release.

Hello Broesel,

Can I ask what settings you are using?

I have the problem that the EVNS is not switching back from 3P to 1P.

From 1P to 3P is working well.

My settings:

5059 op 4200

5058 op 3500

5060 op 1800

Hello @Sanderj. It looks like 3500 W is too small a value - the EVCS cannot reach it.
At the minimum current of 6 A, the power will be (6 × 230) × 3 = 4140 W. Therefore, 3500 W is not reachable. It should be set above 4140 W.

Hello @Nicolas ,

Thank you for the reply,

The problem is only with switching back from 3p to 1p supply. So the old setting on 5058 works already.

All my settings in the EVNS are 1+ higher i don’t know why. So 5058 is the address for switching to 3P.
5059 is the address for switching back to 1P.
And 5060 is the timeout for switching witch is set to 1800seconds.

I’ l try to set 5059 higher to 4300 and see if that will work.

Keep you posted.

Hello @Nicolas

You were right. I have now changed parameter for 3P to 4350Watt. and for going back to 1P to 4200.

1P is now working at 19Amps and that has fixt the problem.

Also I’ m dealing with the problem as Broesel. The timeout is only the time between switching it is not the waiting time for the parameters. So when the power drops to 4200 watt the system switches directly as the timeout time is already over.

What we would like is waiting time so when the power is 4200watt. the system waits with switching for XX seconds when the value rises the timer is going back to 0. So the systems only goes back to 1P when its getting dark of very cloudy instead of one cloud flying over.

thx

Nicolas,

Recently theres been an update to 2.07 and modbus register list 3.9.

I didnt see an extra option for the timeout for the 3p to 1p problem.