I did have a look at that as well, however my Origin Family and Friends discount is coming to an end next month and even despite the $0.08/kWh rate, I'd be better off moving to AGL's regular Value Saver plan and obtaining a $150 sign-up credit, then changing to the EV Energy Plan.
Not only that but the rate that Origin has offered is significantly more than my current plan, and it's a beta.
The new plan if I stay with Origin after my F&F discount is over, is dearer by 35% for the daily supply charge and the usage charges are 15% more.
In comparison, AGL's Value Saver plan is only 5% more for both the supply charge and usage charges, plus I'd get a $150 sign-up credit which is around 1.5 months of electricity for me (probably would be closer to a months' worth once I get the Y - we've both got ICE cars at the moment and our monthly electricity bill is around $100ish - once I get the Y, I'd estimate around another $50/month for charging at our current rates).
From there after I get the sign-up bonus, I could then change to the EV plan for night charging.