OpenEVSE charging limited to 16A

BrianD · 2019-08-19T11:28:24.772Z

My OpenEVSE is only delivering a maximum of 16A when in Normal mode and with the limit set to 32A

The car says only 16A available. Any suggestions?

glyn.hudson · 2019-08-19T12:39:22.603Z

All looks correct on the OpenEVSE config, what does the pilot value show when you turn on advanced mode?

~~What EV are you trying to charge? Does the onboard charger support 32A? It could be your on-board charger is limited ti 16A max?~~

Ah, just rememeberd you have a model 3. The OpenEVSE can certinaly deliver 32A, I’ve used it extensivly to charge Tesla Model S at 32A. I’ve just verifed by reading this TMC thread that the model 3 is capable of 32A on a single-phase using openevse. Could you double check the current setting in the car while charging, I think it defaults to 16A and you may need to increase to 32A. You will only need to do this once, the car will remember the location.

BrianD · 2019-08-19T13:28:08.583Z

This is very odd. The app on my iPhone stopped working as I explained in another thread I started. However I tried it again and the charge rate shot up to 32A. I verified that the car agreed and so I switched the EVSE app back to eco mode and it was regulating nicely as the PV varied from about 1kW to 5kW. Brilliant! Then I tried looking at the EVSE app again but it had stopped in exactly the same manner as I explained in the other thread.

When the EVSE gets ‘stuck’ the car will not allow selection above 16A even though I know the EVSE is set to 32A because accessing it from the desktop machine always works.

Is there a problem in accessing the EVSE from two machines?

glyn.hudson · 2019-08-19T13:38:51.478Z

Good to hear it’s working.

BrianD:

Is there a problem in accessing the EVSE from two machines?

There shouldn’t be, however the ESP8266 WiFi module on the OpenEVSE is resource limited therfore opening several connections concurrently may cause a slow down. I would recomend only accessing the web page from one device at time. That said, I’ve never experiance the interface crash.

BrianD · 2019-08-19T14:48:35.539Z

OK, I shutdown all the machines that can access the OpenEVSE and opened the Safari link on my iPhone. The result was the same as I show in this video:
Video

glyn.hudson · 2019-08-19T15:23:58.193Z

That’s for the video. That’s very useful, it looks like there is a bug with iphone7. Has the iphone 7 ever managed to load the page or does it always hang there?

I’ve just tested and it works fine on an iphone 6, I’ll try and find and iphone 7 to test with.

BrianD · 2019-08-19T15:49:52.587Z

Sometimes (very rarely) it does work with the iPhone 7. When it does, the page refreshes instantly but mostly it fails as I have shown.

BrianD · 2019-08-23T07:21:21.111Z

Now fixed by enabling Javascript on the iPhone. Thanks guys.