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Base Model 3: 57.5 kWh battery. In California, charging at 40c/kWh during the day and discharging at 85c/kWh (for evening peak) would yield about $23 daily - o

Base Model 3: 57.5 kWh battery. In California, charging at 40c/kWh during the day and discharging at 85c/kWh (for evening peak) would yield about $23 daily - or $8,400 annually. Most Tesla's retain above 90% battery capacity after 100,000 miles [1] Completely charging and discharging daily for one year is equivalent to 99,280 miles. A new Model 3 battery pack costs $15,800 [1] currently. 10% degradation is equivalent to $1,580. Doing this currently would provide a ~7-year payback period on a Model 3. [1] https://evannex.com/blogs/news/tesla-model-3-battery-degradation-after-50-000-miles https://evannex.com/blogs/news/tesla-model-3-battery-degrada... [2] https://www.slashgear.com/857917/replacing-the-battery-pack-on-a-tesla-model-3-costs-more-than-you-think/ https://www.slashgear.com/857917/replacing-the-battery-pack-...

idiotsecant 4y ago
On one hand you suggest that we can solve grid battery storage if everyone contributes their personal vehicle battery packs, then on the other hand you suggest prices to support that based on current time of use billings curves. You of course realize that if everyone was contributing power during these times the amount you'd earn from it would be a tiny fraction of what it is now. On top of that, you're assuming a very, very high premium for the power you're selling anyhow. PG&E in California does offer time of use net metering at a much lower rate, but it's not going to be the prime CAISO rate for obvious reasons. I ask again - would you do that? Do you think your neighbors would do that? Do you think it's reasonable to base an entire power grid on that? What about if power starts to get cheaper on a particular day? Do you let the grid reach brownout status based on individual market pricing of individual actors? Or do you just build some dedicated storage stations like any reasonably designed system?

idiotsecant 4y ago

On one hand you suggest that we can solve grid battery storage if everyone contributes their personal vehicle battery packs, then on the other hand you suggest prices to support that based on current time of use billings curves. You of course realize that if everyone was contributing power during these times the amount you'd earn from it would be a tiny fraction of what it is now. On top of that, you're assuming a very, very high premium for the power you're selling anyhow. PG&E in California does offer time of use net metering at a much lower rate, but it's not going to be the prime CAISO rate for obvious reasons. I ask again - would you do that? Do you think your neighbors would do that? Do you think it's reasonable to base an entire power grid on that? What about if power starts to get cheaper on a particular day? Do you let the grid reach brownout status based on individual market pricing of individual actors? Or do you just build some dedicated storage stations like any reasonably designed system?