Flow to load balance between 2 Victron EV Charging stations

With my limited Node-Red and programming skills I wrote a flow that provides load balancing between 2 Victron EV charging stations.

Decided to put it online for people to help me test it and maybe help me understand Node-Red / java script a bit more.

Any comments or improvements are much appreciated:

https://flows.nodered.org/flow/52550767074d398183eaad8bd64b62ae

As not many people have 2 EVCS units, decided to simplify and add a flow for a single unit:

https://flows.nodered.org/flow/cff2380089ac5ca49b1e4a11e62a7811

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Lucian Popescu (Victron Energy Staff) ♦♦ commented · Feb 26 at 06:07 PM

Can you explain for the case there is only one unit, what is your flow doing?

0 ·

kudos50 Lucian Popescu (Victron Energy Staff) ♦♦ commented · Feb 26 at 06:44 PM

Taken from the link description to nodered.org:

<CUT>

This flow is designed for load sharing between a Victron EV Charging Station and your home.

Grid metering: The flow takes a reading from your grid meter and calculates which phase has the heaviest load.

Grid lost and Multi overload alarms: The flow takes grid lost and overload alarms into account by setting the minimum charge current. It does not specifically read if the charger is connected to AC-OUT but simply assumes it will fail otherwise.

Basic load sharing within the house: The flow controls the EV charge current by taking a maximum of 20A grid load. This number was chosen to prevent the new ESS import current limiting feature from kicking in which will simply start inverting the lack of power. If the remaining charge current is less than 6A it will stop the charging process and try to restart it after 5mins.

<PASTE>

1 ·