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energy123 8 hours ago

From the article:

> [250MWh] held in a container 14m high and 15m wide

According to Gemini 3.0 Pro, lifepo4 is 1.5-3.5x more dense than this, which isn't bad. 250MWh is a lot of capacity for such a small land footprint. At 2MW it can power ~2000 homes for ~5 days while taking up the land footprint of ~1 home.

What's the price? And how does the price scale with capacity?

baq 3 hours ago | parent | next [-]

The problem seems to be heat quality - they don’t get electricity back, it’s only good for heating. (Which admittedly makes perfect sense in the winter near the North Pole.)

Maxion 3 hours ago | parent | next [-]

The issue we have in Finland is the assymetric electricity usage between winter and summer. This is driven by the need for heating.

In the past, district heating systems burned coal. Now that's out the window we haven't got enough to burn. We do burn waste products from forestry, trash and the like but there's not enough to go around before you start felling trees en-mass just to heat a city.

A lot of municipalities in Finland are now starting to play with thermal storage. There's this sand battery, but there's even more hot water storage being built and has been built.

In the medium term, winter electricity production and consumption is starting to become a bit of a risk for us.

usr1106 3 hours ago | parent | prev [-]

> near the North Pole.

Finland is not near the North Pole. Lahti is at 61°, right in the middle between Greece and the North Pole.

But yes, heating needs are higher than in most European or North American populated areas.

7 hours ago | parent | prev [-]
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