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Hacker News
“You need to keep an LFP cell at 25 °C, give or take, or it will rapidly degrade” so LFPs have to be heated and cooled - not difficult to solve but it does add cost and complexity to a battery, something Sodium-Ion doesn't require.
But looking at the discharge profile of Sodium-Ion [1], then a 24v stable output would need about 48v at 100% battery charge and that means cost and complexity on the input and output sides to keep a steady voltage over the discharge cycle. LFP have a much flatter discharge curve but it's a much greater concern with Sodium Ion. Sodium Ion is also criticized for its lifetime cycle degradation.
LTO (Lithium Titanate) batteries hit the sweet spot between both chemistries and are used in electric buses, but I still like Sodium batteries for their environmental considerations.
Wouldn't it be great to somehow harvest power from the temperature swings between night and day in arid regions? Also large changes between sea level and cruising altitude.
I know black tourmaline and certain lithium compounds being pyroelectric generate power upon temperature change due to mechanical stress, which instigates piezoelectricity.
"If the goal is maximum electrical energy generated per degree shift, single-crystal PMN-PT (Lead Magnesium Niobate–Lead Titanate) is currently the top-performing synthetic material." [2]
[1] https://hackaday.com/2025/10/30/why-sodium-ion-batteries-are...
by adrianwaj
from what I've heard, the problem with moving sodium from lab to manufacturing is that all the industrial processes and machinery have been setup for lithium and the factories are reluctant to invest in entire new sodium setup for not much benefit for them; lithium works perfectly well and is in fact the superior product, why switch?
Lithium prices have faced a massive crash, so there is no cost penalty for them anymore. Sodium's cost benefit isn't that significant now, and while other technical benefits exist, the question remains, is it worth it to setup an entire new factory from scratch for that marginal benefit?
by ryzvonusef
I've been pondering the question of what happens if you change the design requirements to say, 20 charge/discharge cycles in total, then use it over seasonal timescales. Can you get the price so low that you can scale up enough battery storage to buffer a whole season?
by hgomersall
Keep in mind, we could have had local Na-Ion battery production in the US. The company producing them needed about $5m of bridge loans, with products already sitting in warehouses awaiting the UL certification.
This company got sold for scrap.
by cyberax
I want to replace my Lithium home battery, and what I really want to do it to move to one of the new sodium ion batteries..e.g like the one CATL is supposed to have at some point?
Anyone have a good idea when these will be available for consumers?
> Peak Energy is buying its commercial cells via contracts with Chinese suppliers
So really just assembly and sales then. I suppose it's a good start and maybe if business takes off they can figure out their own cells.
by tootie
Surely this will just be Chinese hardware with a "made in America" label slapped on it. I can't fathom why anyone would allow GM of all companies to get any contracts
My company operates two Jupiter Power owned LFP batteries in the MISO market. Each of them draws .5 - 2MW constantly for the HVAC system. If the cost for sodium batteries is similar to LFP, that alone would be a reason to switch.
by TwiztidK
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- Hacker News
- “You need to keep an LFP cell at 25 °C, give or take, or it will rapidly degrade” so LFPs have to be heated and cooled - not difficult to solve but it does add cost and complexity to a battery, something Sodium-Ion doesn't require.
But looking at the discharge profile of Sodium-Ion [1], then a 24v stable output would need about 48v at 100% battery charge and that means cost and complexity on the input and output sides to keep a steady voltage over the discharge cycle. LFP have a much flatter discharge curve but it's a much greater concern with Sodium Ion. Sodium Ion is also criticized for its lifetime cycle degradation.
LTO (Lithium Titanate) batteries hit the sweet spot between both chemistries and are used in electric buses, but I still like Sodium batteries for their environmental considerations.
Wouldn't it be great to somehow harvest power from the temperature swings between night and day in arid regions? Also large changes between sea level and cruising altitude.
I know black tourmaline and certain lithium compounds being pyroelectric generate power upon temperature change due to mechanical stress, which instigates piezoelectricity.
"If the goal is maximum electrical energy generated per degree shift, single-crystal PMN-PT (Lead Magnesium Niobate–Lead Titanate) is currently the top-performing synthetic material." [2]
[1] https://hackaday.com/2025/10/30/why-sodium-ion-batteries-are...
by adrianwaj - from what I've heard, the problem with moving sodium from lab to manufacturing is that all the industrial processes and machinery have been setup for lithium and the factories are reluctant to invest in entire new sodium setup for not much benefit for them; lithium works perfectly well and is in fact the superior product, why switch?
Lithium prices have faced a massive crash, so there is no cost penalty for them anymore. Sodium's cost benefit isn't that significant now, and while other technical benefits exist, the question remains, is it worth it to setup an entire new factory from scratch for that marginal benefit?
by ryzvonusef - I've been pondering the question of what happens if you change the design requirements to say, 20 charge/discharge cycles in total, then use it over seasonal timescales. Can you get the price so low that you can scale up enough battery storage to buffer a whole season?by hgomersall
- Keep in mind, we could have had local Na-Ion battery production in the US. The company producing them needed about $5m of bridge loans, with products already sitting in warehouses awaiting the UL certification.
This company got sold for scrap.
by cyberax - I want to replace my Lithium home battery, and what I really want to do it to move to one of the new sodium ion batteries..e.g like the one CATL is supposed to have at some point?
Anyone have a good idea when these will be available for consumers?
- > Peak Energy is buying its commercial cells via contracts with Chinese suppliers
So really just assembly and sales then. I suppose it's a good start and maybe if business takes off they can figure out their own cells.
by tootie - Surely this will just be Chinese hardware with a "made in America" label slapped on it. I can't fathom why anyone would allow GM of all companies to get any contracts
- My company operates two Jupiter Power owned LFP batteries in the MISO market. Each of them draws .5 - 2MW constantly for the HVAC system. If the cost for sodium batteries is similar to LFP, that alone would be a reason to switch.by TwiztidK