Comment Re:Not your batteries (Score 1) 81
They are just assuming that consumers will be willing to sign up for something and leave their vehicles connected which will impose significant additional battery wear, and risk not having the charge they want/expect when they want it.
I have 40 kWh of batteries in my home, for backup and time-shifting, and I participate in a grid-stabilization program with my power company. The grid never draws significant energy from my batteries -- grid stabilization doesn't need a lot of energy, just a brief spike of power to keep things stable while the operator makes other adjustments. Historically this has been unnecessary because generation was from big spinning turbines and their inertia was enough to smooth out spikes and dips in demand. But renewable-heavy grids don't have the tons of spinning steel, so batteries increasingly fill the gaps.
What do I actually see when the power company draws from my batteries? I see an otherwise-unexplained spike of 5-10 kW flowing from my batteries and into the grid, for a period of 2-5 minutes. 10 kW for 5 minutes is ~0.8 kWh, which is 2% of my house battery storage. I see a draw that large maybe once per week; usually it's much less. Bottom line: the impact on my storage is insignificant, and my house batteries are smaller than what most EVs have (my EV has a 100 kWh battery pack).
What do I get for allowing the power company to do that? For the first year of participation, I got a check for $2000. For subsequent years I'll get bill credits of up to $50/month, applied to energy charges only. I'm not sure how much that will translate to, since my net energy purchase is usually zero (thanks to solar panels). It's a great deal for the first year. Beyond that... we'll see.