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Our cars have a total of 8x the capacity of our home batteries. We're ~ one dongle away from doing what you describe. The other thing we need to see to really

by hedora 9mo ago

Our cars have a total of 8x the capacity of our home batteries. We're ~ one dongle away from doing what you describe. The other thing we need to see to really replace grids are panels that are optimized for overcast days. Currently, production drops to 0-10% when it's cloudy, even though the fraction of wattage hitting the panels is way higher than that. At some point, I think we'll end up with panels that produce linearly to the amount of light (this is probably hard), or that are high efficiency in winter / high altitudes, but low efficiency at peak (this is probably easy). Currently, panels are marketed on wattage under full sunlight at high temperatures. This is important for air conditioning use cases, but the grid is overproducing on those days already and we'd curtail if we took them off grid.

kkfx 9mo ago
Same for me, I made a choice back then, and only realized it was a mistake in hindsight, to set up a small storage system, thinking it would just serve as a backup for blackouts. Since those have mostly been very short so far (a few seconds or minutes), I went with 8kWh, while the car has 74... Today I'm expanding it, aiming for 38kWh, which is still much less than the car. Even though the price of LFP batteries has dropped significantly, it hasn't fallen enough, nor has the cost of grid power risen enough, to justify aiming for 100kWh to have substantial autonomy for most of the year, including heating. Using the car as part of the system would be fantastic, and the technology is all there to make it happen, except for the will of manufacturers and the political drive to go in that direction. It's not happening because they don't want people to be self-sufficient; they want large power plants, not semi-autonomous homes and warehouses. But the fact is, economically and technically, the former makes no sense, while the latter does.

by hedora 9mo ago

kkfx 9mo ago

Same for me, I made a choice back then, and only realized it was a mistake in hindsight, to set up a small storage system, thinking it would just serve as a backup for blackouts. Since those have mostly been very short so far (a few seconds or minutes), I went with 8kWh, while the car has 74... Today I'm expanding it, aiming for 38kWh, which is still much less than the car. Even though the price of LFP batteries has dropped significantly, it hasn't fallen enough, nor has the cost of grid power risen enough, to justify aiming for 100kWh to have substantial autonomy for most of the year, including heating. Using the car as part of the system would be fantastic, and the technology is all there to make it happen, except for the will of manufacturers and the political drive to go in that direction. It's not happening because they don't want people to be self-sufficient; they want large power plants, not semi-autonomous homes and warehouses. But the fact is, economically and technically, the former makes no sense, while the latter does.