SRP (power utility in Az) is pushing for construction of about a dozen more gas power peaker plants in Coolidge Az (cuz who else would put up with more smoke stacks already in place, it's a impoverished town). Gas is still too cheap for SRP to buy MegaPacks or more solar. Make no mistake, these new plants are for hottest summer days - solar could cover this growing need in Phoenix (where there's little water anyway).
SRP also paid for half of my first Powerwall 2yr ago as a $3,600 cash rebate. But I think this was only as a result of settling in court with Tesla. So, not nearly enough powerwalls to cover it simply because solar is still expensive (which is because we only get pennies/kWh as set by what it costs SRP to fire up the smoke stacks instead. I conclude the only motivation to help the grid is either new money or new law (Edit: or cheaper solar etc).
Old news but let's revisit V2G or V2H bc I think Elon goofed up (or is coy). Consider the fact the the owners of Roadsters were probably the wealthiest around so one has to question their needs or lifestyles. It was the wrong test market study IMO... fire away!
"Musk’s comments during Battery Day also suggest that the company doesn’t think its customers are hungry enough for vehicle-to-grid capabilities yet. “Very few people would actually use vehicle-to-grid,” Musk said during Battery Day. “We actually had that with the original Roadster. We had vehicle-to-grid capabilities — nobody used it.”
Heck, I own 2 powerwalls and still find opportunities to use the vehicle for power. No I think he did it for vehicle warranty reasons (there's only so many cycles in a battery). Bring in the Million Mile battery, whole new story! I bet it returns with 4680.