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In Ontario! The new optional Ultra-Low Overnight price plan provides:

Ultra-low overnight rate of 2.4 cents per kWh: everyday 11 p.m.-7 a.m.
Mid-peak rates of 10.2 cents per kWh: weekdays 7 a.m.-4 p.m. and 9 p.m.-11 p.m.
On-peak rates of 24.0 cents per kWh: weekdays 4 p.m.-9 p.m.
Weekend off-peak rates of 7.4 cents per kWh: weekends and statutory holidays 7 a.m.-11 p.m.

https://news.ontario.ca/en/release/1002916/ontario-launches-new-ultra-low-overnight-electricity-price-plan

I definitely take advantage. I have solar panels that generate a moderate amount of energy, heat pump, and electric (heat pump) furnace and hot water tank plus two electric cars. Home Assistant has been such a dream to maximize the low energy and self-generated energy.

I have debated adding some batteries, but the amount of energy we use, especially at -30 c, it’s cost prohibitive.

I need to look into this again. I had it installed at the beginning of the winter and found it wonky. Heating during peak hours and not doing a thing when we pay .02$/kWh