[discordance]

I admire the audacity and the inventiveness of Lavo, but buying these seems nuts to me.

A 40 kWh LiFePO4 battery + grid tie inverter can be had for much less. Safe, well tested and already in high volume manufacturing. Shipped to your door tomorrow.

[hnov]

Economies of scale will bring prices down. It's becoming clear that a combination of energy density, capacity and transport requirements are going to make hydrogen a thing for some applications. Remember that in the 90s GM was using lead acid batteries in its electric cars and the general population laughed at them.

[ZeroGravitas]

Yeah, I dont see how this hydrogen battery is a very good battery.

If they could get anywhere near lithium battery efficiency for a round trip then the breakthrough in fuel cell efficiency (and possibly also electrolyzer efficiency) required to do that would be the headline.

And if they can't, then they'd probably need to be implausibly low cost to make it worthwile, and they don't seem to be that either.

Maybe there's some way of using the waste heat that improves it? Still seems unlikely.

So just an expensive, awkward low efficiency battery, when cheap, commodity, high-efficiency batteries are available.

[ParksNet]

Can we ever reasonably expect to use our cars for that, with vehicle2grid?

I have a ~60kWh battery sitting around in my garage, that I typically only use 10% for daily driving.

[liketochill]

How many cycles is that battery good for, and how much would you have to be paid for some of those cycles. Electricity where I live is 10 cents a kWh so there is $6 of electricity in your battery. Is it worth an extra cycle Every day, halving the life of the battery, for some fraction of $6?

[piceas]

It might if it prevents buying an extra €6100 worth of batteries for the house.

[Stevvo]

The price quoted in the article is $20,000 which is almost exactly the market cost of a 40 KWh LiFePO4 battery, but most people would probably end up paying more than that. The cost is directly comparable, nothing nuts there.

[pclmulqdq]

Last time I costed out an LiFePO4 battery for my house, it looked like it was about $1/kWh, so $20k for 40 kWh still seems like a good trade. However, battery prices may have gone down by that much since 2 years ago.

[dirkf]

(ITYM $1/Wh, not kWh)

For reference, I'm currently waiting for delivery of a 10kWh battery that will cost me about €6100 (including VAT, excluding installation and government subsidy).

[rapsey]

You can get that for half the price on aliexpress. Shipped from within EU.

[slaw]

28kWh of battery cells is 3,746.48 USD with free shipping. Price went up recently. https://www.aliexpress.com/item/3256803518663847.html

[discordance]

Here’s one example ($341.60 / kWh):

https://signaturesolar.com/eg4-ll-lithium-battery-24v-200ah/

[AtlasBarfed]

That still seems far more expensive than what tesla pays. 100kwh packs would cost $34,000 and that is NOT what Tesla pays. Replacement (aka likely retail so more expensive than their OEM/component cost) is 13,500$ for a Tesla 100kwhr battery.

I get Tesla has so many investements and supply setup to enable that but... 3x as expensive? From a direct-from-china supplier basically?

It annoys me how much battery costs are still sky high for consumers of batteries for all the different cases (lawnmowers, snow blowers, etc), but it shows how much future cost drops will happen with battery-electric goods in the future as supply continues to be scaled.

200 wh/kg LFP and 140 whk/kg sodium ion (next year in production, allegedly) should make for some huge cost savings to so many applications.

You know, if they passed savings to the consumer. Which is probably a pipe dream.

[umeshunni]

Rumors are that Tesla pays less than $100/kwh

Also, https://about.bnef.com/blog/battery-pack-prices-cited-below-...