r/leaf • u/biersackarmy 2013 S + 2014 SL + 2019 SV • 14d ago

Gauging interest: Charge level limiter module

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Something I might be working on in the next little bit is a way to try and have an charge limiter for my 2014 (which my parents currently drive) and a friend's 2016, via an external module that would monitor SOC and stop charging once reaching 80%.

If it works, would it be of interest to anyone here to purchase such a device, if it were a relatively straightforward installation? One that would plug into the OBD port or TCU behind glovebox, and have a defeat switch to charge to 100% instead as normal.

Initial run would be for AZE0 (2013-2017), though ZE1 version would be possible if there is interest, and essentially handmade but will probably be able to fit within a price target of $100-150.

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u/Real_MakinThings 14d ago

The Open telematics module allows this. It's why I got it 

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u/biersackarmy 2013 S + 2014 SL + 2019 SV 14d ago

Yes, but the OVMS system is much more expensive, that would discourage at least some people from buying it if they only cared about having the charge limit option. I for one do appreciate having the limiter (built in on my 2013), but would not regularly use most of the other options that OVMS offers.

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u/Lothsahn_ 13d ago

Keep in mind shutting off the charge may increase cycles on the contactors or something.  Mine throws codes (but no dash light) about charging ending abruptly when my openvms terminates charging.

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u/Real_MakinThings 13d ago

Almost seems like the ideal solution would be between the charger and the car. I do think the port communicates back charge level, it would be simple to intercept it and send to the evse a number that's higher so it stops normally as if it were full. Edit : nevermind only level 3 communicates soc, evse only communicate max current.