Charge your EV with unused Solar with EVCC

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1

Hi!

I have been working with the team over at EVCC. They have a great solution to control the charge of your EV. They support several chargers and cars as well as different solar systems (meteors, inverters etc).

They now have support for Tesla Wall Charger (testing). It works quite well and removes lots of work for automating. HA also has an add-on for EVCC but that does not run the version having support for TWC yet since it is in testing and they are now asking for more testers before they add it into the product.

Go to https://evcc.io to check it out.

Also the threat here on their discussions board.
[Tesla Gen3 Wall Connector · Discussion #1505 · evcc-io/evcc · GitHub](https://support for Tesla Wall Charger)

2

Hi there,

on my quest to find something that controls charging of my PV battery, car batter and at a later point in time also my heat pump I have now stumbled on EVCC.
I am currently working on the initial config, and am unsure what to do about the Wallbox. My Heidelberg Energy Control is a “dumb” wallbox that cannot be controlled at all, so I do all my automation through the Tesla Custom integration…but how do I teach EVCC that?

3

If you run HAOS, EVCC is now available as an add-on.

Link to instructions:

With little fuss I was able to integrate my MG4, Fronius solar, and ZJBeny charger.

Great system for soaking up excess solar !

4

I have a problem to understand the Charging logic behind evcc.
I plugged my car in the evening, when there is no solar power available.

The charging window shows correctly the cheapest price slots in the evcc window:

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See that there are no other power sources than grid and only house and car is drawing power.

But the charging has stated with slow charging (6A) as if there were solar production.

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And if we check the actual charging window the evcc integration does not switch to cheapest window charging, but charges in 6A current until car battery in defined capacity.

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5

You have 'Min+Solar' selected so it's doing what you've asked it to ( minimum, plus any excess solar, which is zero at night )

If you want solar only, select 'solar'

@valexi

6

@jivesinger Yes. I assumed that (according to documentation) it should charge with minimum price + if there is excess solar.

But why the evcc started charging slowly (4,1 kW) with high electricity price, when there is no solar?

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From 01:00 o' clock the spot price would be near 0 c as in the evening it was around 5 c. We did have plenty of time to charge with 11 kW as the plan departure time was 07:00.

So in my case the evcc optimized the most priciest time slot of the charging window. :frowning:

7

@valexi

The min in min+pv refers to power, not price.
In your case, 6 amps

8

@jivesinger So Solar should be the right charging method to charge with Solar and if not enough, it will use the cheapest charging window?

9

@valexi
If you have it set up, yes.
I have no experience with it personally though.