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this post was submitted on 05 Oct 2023
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My work is trying to engineer a design /plan for electric school busses connected to the grid.
They are only used for 4-6 hours a day and are stationary the rest. Perfect resource to keep plugged into the grid and help stabilize demand. Our initial study shows they could potentially pay for themselves, but at the very least subsidize their own cost quite significantly.
Given that they're stationary for so long, doesn't that make a compelling case for batteries? Surely vehicles in continuous use benefit more from being connected to the grid. Forgive me if this is naive!
They need enough battery power to do their rounds. Outside that however, that same battery can act as a power bank to the mains. Effectively you can buy electricity when it's momentarily cheap, and sell it back when the price spikes. So long as it's charged for the next run, it's fine.
This provides buffering to the system for intermittent sources e.g. solar, as well as making money from idle busses.
Ohhh I see. I was imagining busses somehow powered by a rail/cable at all times lol, which in hindsight doesn't make any sense. The reality is very cool! Thanks for sharing.