L2 minimum current should be 6A not 10A?

[glynhudson]

The correct L2 minimum current should be 6A not 10A:

https://github.com/lincomatic/open_evse/blob/development/firmware/open_evse/open_evse.h#L354

Updating from OpenEVSE v3.10.4 to v4.8.0 the minimum L2 current increased to 10A. I've traced the change back to this commit: https://github.com/lincomatic/open_evse/commit/e144329e2965ca85369f9825ea6332839ab9e0bf

I can't find any comments about why the minimum current was increased to 10A? Trickle charging at 6A used to work fine

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On a slight different topic: IMO it would also be a good idea to limit L2 max current to 40A max since this is the maximum the single-phase cables EV cables can handle. Most are rated at 32A. It would certainty be a good idea to limit the max rate to 40A for a full-assembled 40A unit. This issue should probably be opened with @chris1howell on the OpenEVSE repo.

[glynhudson]

Can you confirm this is a bug rather than an intentional change? Is it possible to release an updated version that allows 6A to be selected?

[chris1howell]

It is just a setting in openevse.h. I will change MIN_CURRENT_CAPACITY_L2 in 4.8.0 back to 6A as defined by SAE J1772.

// minimum allowable current in amps

define MIN_CURRENT_CAPACITY_L1 6

define MIN_CURRENT_CAPACITY_L2 6

// maximum allowable current in amps

define MAX_CURRENT_CAPACITY_L1 24 // J1772 Max for L1 on a 20A circuit

define MAX_CURRENT_CAPACITY_L2 40 // J1772 Max for L2

On Tue, Oct 31, 2017 at 6:55 AM, Glyn Hudson notifications@github.com<mailto:notifications@github.com> wrote:

Can you confirm this is a bug rather than an intentional change? Is it possible to release an updated version that allows 6A to be selected?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHubhttps://github.com/lincomatic/open_evse/issues/73#issuecomment-340769544, or mute the threadhttps://github.com/notifications/unsubscribe-auth/ABvYH8nUT1CMLiJC1gvWUmSndS3-l2LKks5sxybtgaJpZM4P-iSg.

[glynhudson]

It is just a setting in openevse.h. I will change MIN_CURRENT_CAPACITY_L2 in 4.8.0 back to 6A as defined by SAE J1772.

Fantastic :+1: . It would be a good idea to also bump the version to 4.8.1 to distinguish between the two.

Are you also going to set 40A maximum on your 40A units? I would be happy to receive units with 40A max setting this since all the units we ship are 32A max (UK single-phase recommended limit).

[glynhudson]

I see this issue has been fixed by https://github.com/lincomatic/open_evse/commit/48235616a3ed5be6fe438bca633565adc30b67eb thanks @lincomatic

@lincomatic are there any known issues with using the development branch? I'll try and compile and test. Thanks :+1: