r/EnergyStorage • u/CricketVast5924 • 2d ago

When do we anticipate solid-state batteries to hit consumer markets for home backup?

What the title says. Looking to store excess from my solar into a 3-6 Kwh battery systems and don't want to invest thousands into a chemical that can burn down a house in an instant.

Edit: Thank you everyone for the responses. What I gather from the comments, its either LFP or sodium-ion one for home battery usage.

19 Upvotes

95% Upvoted

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10

u/flying_butt_fucker 2d ago

LFP won't burn instantly, and sodium ion is what you're looking for. Forget about solid state, it's eternal 5 years out.

3

u/ProtoplanetaryNebula 2d ago

Partially agree. Yes, sodium is a much better idea for storage.

Solid state is already in pilot production, so we should see commercial cells in the next 18 months. That said, the point of solid state is the higher density, which doesn’t matter for storage, as it’s not moving anywhere anyhow.

6

u/Yellow_Triangle 2d ago

There is really no good reason why you would want solid state batteries for home storage. The main advantages with going solid state, power vs weight and charging speed, is really not that important when the battery does not need to be built into a vehicle.

The extra cost compared to the battery technology we already have just makes it a bad idea. You would get better value for money if you just installed more kWh of normal battery storage.

1

u/Sven_Grammerstorf_ 8h ago

Won’t catch on fire. That’s a big reason.

4

u/Caos1980 2d ago

Unlike NMC, LiFePO4 (aka LFP) batteries are quite safe, fire hazard wise.

There are videos of batteries being punctured without issue.

Also, sodium batteries are also considered very safe, even more than LFP batteries and will bring 20000 cycles lifetime instead of 5000 cycles that LFP provides or the 2000 cycles NMC provides.

I wouldn’t put a NMC battery in my home, but I would have no issue with an LFP or a sodium battery.

My 2 cents.

2

u/xtnh 1d ago

And yet my zoning requires them to be kept outside the garage

1

u/Ok-Resolve-3504 6h ago

mine too. I’m currently building an insulated container around them. Without it, the internal heaters will be sucking 800 kw out of them

2

u/IcyUse33 2d ago

Solid state is too expensive for home storage.

SS is great for high current applications though (EVs).

Home Backup / solar storage rarely even gets close to 1C charge rates.

2

u/kmp11 2d ago

Iron phosphate Li-ion chemistry (LiFePO4) are going to be hard to displace because of the mass production. This will be the main choice for many years to come.

you should read up on the LFP chemistry, you'll see how much safer and durable they are compared to both Cobalt (car batteries) and lead acid batteries.

2

u/CharlesM99 2d ago

There are many types of solid state batteries. The first ones you'll be able to buy will be semi-solid state and contain some liquid electrolyte.
Solid state is not by definition less prone to fire. A big issue with many types of solid state battery is they form dendrites more easily than todays LFP and NMC batteries. Dendrites can grow big enough to create a short between the anode and cathode, and that leads to fire.

We are steadily step by step progressing towards better and better batteries in every way, better longevity, faster charging, higher energy densities and higher safety. There isn't going to be a technology that gets figured out from one day to the next that significantly advances battery technology, there will continue to be tons of small incremental improvements.

1

u/pieterbos 2d ago

Indevolt already sells semi solid state batteries for home storage.

2

u/suchnerve 2d ago

LFP if buying soon; sodium if buying once mass production has scaled to the point that it’s cheaper than LFP.

Don’t bother with any other home battery options, because those two are the only good ones.

1

u/EntirelyRandom1590 1d ago

Solid state batteries are batteries are beneficial because they offer greater energy density, which is incredibly important in mobility uses, but somewhat unnecessary in static uses.

Which is why LFP batteries are used in static and lower-cost mobility batteries. Less energy dense but also cheaper.

1

u/JhonWhoo 22h ago

Solid state may be useful for mobility, but lfp is the way to go for domestic storage imo

1

u/l008com 2h ago

What the comment says. Given that volume and weight don't really matter in a home-based battery system that never goes anywhere, it seems like a lead-acid system would be a good option for your home? It would be large, and heavy. But it would be pretty safe and is highly, easily recyclable. You could even DIY one with car batteries.