Setting the maximum grid load

Hi. I live in Queensland. I looking to purchase an EV charger and I am attracted to NZ designed and built technology. I have a 10kW solar system and single phase grid connection. Unlike other states, Qld has an irritating connection rule: An EV charger can only be connected to an uncontrolled tarrif if it is limited to 20A. An EV charger which draws 32A must be connected to a circuit on a controlled tariff. If I go down that path I will not be able to use my solar to charge my car. My question is: Can the E2 EV charger be configured by the technician to set the maxium grid current to 20Amp. If the sun is sufficiently shining (which it does quite a bit in Queensland), then would it be able to charge to the 7.2KW / 32 Amp capacity? Further, if the Government subsequently decides to change this rule, would I need to get the technician back out to reprogram the device?

Hi Gerard.

Good question! At this point the only limit which can be set is the output limit, so it does not take into account the fact that really it is the grid limit which matters for your purposes. However, a solution for your Queensland scenario is definitely on our near term roadmap, because as you say it is not useful if you have to connect your solar charger to the controlled tariff.

Regards,

Tom

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Hi Tom. I have not yet purchased a charger. In your response abovle back in September you indicated that a solution for the Qld grid limit was on your ‘near term roadmap’. I am wondering how close to ‘near term’ that is. Should I hold off purchasing a charger? Gerard

Hi Gerard.

It’s currently undergoing implementation, and will require a solid amount of testing; t’s part of a number of changes to the logic that determines how much power to allow in a range of scenarios, all of which affect each other and need to be reconciled! So I doubt the release will be this side of Christmas and will likely become available in January.

Of course, all our chargers are firmware updatable, so one option is to get it installed now with the output limited to 20A, and then raise the limit to 32A with a “from-grid-limit” of 20A once the logic handling that case has been loaded onto your charger.

Regards,

Tom

Thanks for the quick response Tom. I have been involved in software development, I can imagine there are many scearnios that need to be tested. Very exciting though to hear that this feature is coming soon. If I get it installed before the firmware update, will I need to get the technician to return and reconfigure?

No, we can push new firmware remotely (important if there were ever to be a fault that requires an update!). Usually this slowly happens across our fleet over a couple of weeks so that we can monitor that all is well as we go through it, but we could ensure your charger is one of the early ones given that there is a specific new feature that you want to activate.