EVSE with OCPP 1.6j - Necessary?

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RiskAdverse

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#323319 18-Nov-2025 09:13

I'm looking at getting a wall mounted "charger" for an EV. Some of the chargers have some form of Dynamic Load Management - using a clamp to montior the total house hold current. This sounds useful, as does the solar options.

However I don't understand how the smart grid / OCPP communication works. Will this capability allow for the Power Company to remotely reduce the load when there is a supply shortfall? Will I get a cheaper tariff as a result?

Jase2985

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#3435491 18-Nov-2025 10:20

don't know about the cheaper tariff bit, but it allows them to dynamically adjust the load on the grid, high demand, less EV charging, low demand, more charging.

Don't believe its really used here just yet.

nice to have not need to have, the current clamps or way of measuring home demand is more important so you dont end up exporting solar or the charger can slow down or stop if you are using too much power in the house.

richms

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#3435498 18-Nov-2025 10:35

The clamp on the incoming supply is pretty much essential because of the tiny little supplies that NZ houses get so you dont trip the main breaker or worse, a fuse that the lines company will bill you to replace.

At this stage I would not spend more on one that has the protocols to connect out to be controlled because by the time anything in that space happens in NZ, things will have moved on from what is available now. Unless they give me a decent financial reason to not go loading the supply up to the max at "peak" times, then that is exactly what I will be doing.

Richard rich.ms