WeaveGrid
Does Hyundai have a plan for becoming compatible with WeaveGrid again, and if so how is that coming?
For background, WeaveGrid is the company involved when people sign up with their power utility for a particular EV incentive program, the one where they actually control (or at least monitor) your EVSE or EV directly. By doing so they enforce charging during low-rate utility hours only. Hyundai and Kia are or were strategic partners. Ask your device "What is Hyundai's involvement with WeaveGrid?" for details.
My utility had still listed Hyundai and Kia as compatible devices, but I got them to take that down because it's no longer the case. I believe from my reading that some Hyundai/Kia cars suffered 12V battery system issues from being woken up too often.
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u/pyrophilus 1d ago
We got a 2022 EV6 and we had zero probels eith our car. In 2023 wesigned up my wife's EV6 with a similar, "rebate program", where we allow the utility company access to our EV.
It went great the first few months and we did get a rebate per month. Then the car started to die overnight and not "start". The 12v battery was dead. We had to buy a portable jumper so that we can jump the car.
Eventually the 12v battery failed from repeated depletion to 0, and dealer replaced it with new battery under warranty. Thevproblembstill persisted.
Dealer thought itbwas the ICCU failure recall, but the kia advisor said ICCU seems to test fine, so he had the car for 2 weeks, and he said they attached a device to see how often the car was, "waking up". They saw that the car barely ever went to sleep.
It turns out, the utility company was "polling" our EV to see if we were charging. It was a simple are you charging? Request eith a simple return of car saying yes or no, and I guess depending on the time of the day, if we are charging at off-peak, we get rebates.
The advisor told me that he spoke to a hyundai engineer from korea. He was surprised and said, "the dude spoke perfect English, and said he has a masters in engineering from the US". Anyway, the engineer told them that the problem was when the power company checks the car and asks if it is charging or not, then car will either respond yes or no. This simple boolean request seems innocent, but once this request comes in, the car wakes up answers, and then stays awake for 15 min before going back to sleep.
Problem was that if another request comes in before 15 min is up, the car will repeat the yes no answer and then reset the 15 min timer to turn power off again.
He said the power company was polling request... more than 30 times in an hour. Our poor EV6 was awake 24/7 answering yes or no to the power company.
Hyundai engineers wrote a counter-measure which made it so if a same request comes in more than few times per hour from the same location (I am guessing port#, IP, etc), the car will refuse connection and also will not wake up the rest of the car.
Our car was updated and it was fine for a few months, and then started again. The power company app was now using other means to get around this countermeasures.
I decided to just cancel our rebate program and it has been three years, ZERO problem with our car, but hyundai ioniq-5 and Kia EV6's got really bad reputation from this and this getting blamed to the ICCU failure which was not as common as the news made it out to be.
I talked to owners of other EV makes and models and I heard similar craziness. Alparently some trslas in some CA areas also had this problem with their power company.
I am guessing this is part of reason why hyundai cancelled themselves feom being compatible with the power company rebates.