Vector EDMI Mk 10D power meter operation

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MikeFly

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#317703 7-Nov-2024 10:06

I have the above meter running 3 phase and about to run solar single phase for most of the house circuits.

Can someone tell me if the meter aggregates the 3 phases or bills each phase separately?

So for example if I have each phase supplying 2kW but am generating 6kW, do I get billed for 0kW or do I get billed for 4kW, and credited for 4kW for the export?

Reason for the question is do I need to move daytime power usage over to the Solar supplied phase?

boosacnoodle

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#3306596 7-Nov-2024 13:25

You solar will export on the one phase and you will consume on the other three phases, is my understanding. Among other things, this can cause imbalances where you can be importing say 2/3 of your power but supplying 1/3 of your power. It's not really recommended.

mentalinc

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#3306599 7-Nov-2024 13:37

90% likely your going to get a new export enable meter.

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Quic: https://account.quic.nz/refer/473833 R473833EQKIBX

MikeFly

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#3306641 7-Nov-2024 15:27

Maybe I need to clarify.

What I want to know is how does the meter handle the 3 phases, and therefore how does it measure the power used or exported.

I will indeed be getting a new meter or this one will be reprogrammed, and I will have the same question when that happens.

If I scroll through the settings I get a readout that says t P -2.5kW. Can't find what that means but assume its total power, if so possibly this is the number that ends up on the power bill, ie I am not earning from that currently, but possibly not getting charged for the summed power across the 3 phases?

SomeoneSomewhere

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#3306677 7-Nov-2024 16:58

This topic has come up before and people are very upset about it. See e.g. this thread and this thread.

It is a matter of configuration, not hardware. The same meter installed in Australia is configured differently.

Here in NZ, there is no allowance between phases. If you are generating at 3kW on one phase and consuming 3kW on another phase, you will be credited for the power you export then charged for the power you import.

One or two manufacturers now seem to make three-phase inverters that claim to handle asymmetric loading but I haven't seen one in action.

MikeFly

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#3306702 7-Nov-2024 19:09

Great, thanks, that's the answer I was looking for.

Didnt read the threads, my choice to export power over my current setup, so be it.

MikeFly

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#3354472 17-Mar-2025 06:49

Found this recent, short, YT explanation regarding the setup of metering in NZ which is very good.

https://www.youtube.com/watch?v=hlgzGX4dMGQ

Dyson

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boosacnoodle

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#3354498 17-Mar-2025 09:19

SomeoneSomewhere:

One or two manufacturers now seem to make three-phase inverters that claim to handle asymmetric loading but I haven't seen one in action.

SMA sells three-phase inverters.

MikeFly

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#3354499 17-Mar-2025 09:26

boosacnoodle:

SomeoneSomewhere:

One or two manufacturers now seem to make three-phase inverters that claim to handle asymmetric loading but I haven't seen one in action.

SMA sells three-phase inverters.

What Someonesomehwere was saying is that asymmetric or unbalanced 3 phase inverters are available (google finds them).

So far the only ones I have found are hybrid inverters, but I believe there is one around that is basically 3 x 1 phase inverters

SomeoneSomewhere

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#3354577 17-Mar-2025 12:26

The issue with 3x1 phase inverters is that unless the solar side is interconnected, you still can't move power from one phase to another.

boosacnoodle

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#3354589 17-Mar-2025 12:58

SomeoneSomewhere:

The issue with 3x1 phase inverters is that unless the solar side is interconnected, you still can't move power from one phase to another.

Is this also the same with the SMA Tripower? Could not find anything to say either way.