Daklein
Posts: 79
Joined: Fri Sep 06, 2019 7:58 pm
Delivery Date: 02 Sep 2019
Location: Hartland, MI

Re: automatically ajusting EVSE for off-grid/current sensing

Mon Aug 31, 2020 6:11 am

I wonder if the leaf onboard charger measures the grid frequency and puts it on the can bus? Ie 50 eu or 60 us hz

In my case, the off-grid inverter raises the frequency when house batteries are near full, in order to limit solar inverter production. That's the time to increase consumption by the leaf charger.
2014 Leaf S Plus :o (12/2019 62kWh swap!)

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Dala
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Posts: 261
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851
Location: Finland
Contact: Website

Re: automatically ajusting EVSE for off-grid/current sensing

Mon Aug 31, 2020 7:22 am

Daklein wrote:
Mon Aug 31, 2020 6:11 am
I wonder if the leaf onboard charger measures the grid frequency and puts it on the can bus? Ie 50 eu or 60 us hz

In my case, the off-grid inverter raises the frequency when house batteries are near full, in order to limit solar inverter production. That's the time to increase consumption by the leaf charger.
Grid frequency is not measured, or atleast I haven't been able to find it. But voltage is, so it is possible to build on the functionality, and add a brownout preventer, something that drops the load incase the voltage sags.

Oilpan4
Posts: 1771
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: automatically ajusting EVSE for off-grid/current sensing

Wed Sep 02, 2020 7:23 am

You could build that as an add on control box. Build it around an under voltage relay and some time delays.
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