Post #1883145
2023-06-04 10:22 UTC
As long as batteries have capacity to charge or discharge, they can do either with any power (up to their maximum power) you need, so they can actually replace your generators, create and maintain a grid, and control their power according to demand. So you can actually turn off those fossil fuel monsters!
And by charging, batteries can provide "negative power". Your minimum idling power is now negative, which means you can suck up excess PV power, and feed it back into the grid later!
Replies (2)
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@sbi@toot.berlin 2023-06-04 10:24
But you cannot charge a fully charged 5MWh battery any further and will only ever get <5MWh out of it. And once discharged, you need electricity to charge it again, rather than just refilling a tank. Plus, batteries have a much lower energy density than fossil fuel. The latter is why most batteries are not well suited for storing considerable amounts of energy: A 10MWh battery plant is the size of a school's gym, while a 1MW diesel generator and 10h worth of fuel easily fit into 1–2 containers.
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@hruske@mastodon.green 2024-04-07 17:18
@sbi I think this is really underrated. Batteries can adjust for 200% of rated power, a gas turbine for 90%, and a local coal plant for ~60%.