Tewaycell 10kwh Sodium-Ion 48V with Built-in Inverter
- Thread starter Balderdashian
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meetyg
Solar Addict
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- Jun 4, 2021
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AFAIK, yes they do...
AragonLad
New Member
The sodium battery in the link on the OP message is for an "all in one" product with mppt charge controller and inverter. Presumably these have been designed and manufactured to optimise the power potential from sodium chemistry.
If so this negates much of the discussion about inverter and charger incompatibility.
Would love to see this tested as I'm really interested in sodium chemistry due to it's supposed better performance in temperature extremes.
I’ve seen them advertised both ways. Most of them seem to have BMS systems. I’ve only seen 1 brand that said no BMS required and was stated to be a “lead acid replacement”.
JäseH
New Member
I'm curious as to whether the tradeoff of lower energy density and specialized hardware is superior to insulating and heating a LFP battery
Ping Will, maybe he can test one out.
AragonLad
New Member
I guess what I was trying to say is that an "all in one" system (a battery, charge controller and inverter combined and assembled in a box at the factory) should be optimised to get maximum performance out of the sodium chemistry.
You would hope that the factory would use an inverter that was sodium battery specific and not just a generic inverter.
But it would need confirmation from the factory, or testing in real life.
In any event that would be a very cool test for Will to perform.
I'm new to the forum....how do I ping Will with this suggestion?
You would hope that the factory would use an inverter that was sodium battery specific and not just a generic inverter.
But it would need confirmation from the factory, or testing in real life.
In any event that would be a very cool test for Will to perform.
I'm new to the forum....how do I ping Will with this suggestion?
JäseH
New Member
Sodium ion batteries are less efficient (round trip efficiency is 60 to 85%. Lithium ion is 90 to 97%), hold less energy for its volume and have shorter life cycle count.
Which makes them pretty bad for solar systems. Still not sure why people mention them.
If the tech gets better one day then I can't wait to test them. But I haven't seen a single compelling one at any of the conferences.
Exactly. And if you have to deal with that voltage curve you might as well just use LTO.
AragonLad
New Member
Thanks for the reply Will.
I guess the round trip efficiency issue was my original question:
Do the an "all in one" sodium ion batteries (with built in charge controller and inverter) have sodium specific inverters to accommodate the wider voltage range of the sodium chemistry?
If a sodium specific inverter (with a higher high voltage disconnect and a lower low voltage disconnect) is used then the round trip efficiency improves considerably as more of the battery voltage is accessible and usable.
If a generic inverter is used then less of the sodium battery's voltage will be accessible and round trip efficiency reduces.
The attraction for me is a more stable chemistry at temperature extremes. And to a lesser extent the removal of that lingering concern over lithium's reputation to self combust.
Claimed life cycles seems to be comparable to lithium and space isn't a concern for me.
Is there a place for sodium?
I think so if some of the hardware issues are addressed
Lithium battery tear downs and comparative tests have been done to death
Is it time to have a look at some of the sodium "all in one" batteries which should be using sodium specific hardware inside their housings?
Just a thought, Will, and I'm sure I'm not the only one that is thinking this way.
I know this is a long post but would love to hear your thoughts.
This Off Grid Garage test shows the importance of inverter voltage disconnect settings for extracting available power from sodium battery:
My interest is from the same concerns. Temperature range, fire risk, and overall environmental impact.
I live in MT where -20 degrees or lower is pretty common in winter. I want something more efficient than lead acid. I like the idea of a battery that doesn’t have toxic flammable components and is pretty environmentally friendly. I get there are ways to use lithium in cold environments. To me that is just another component in the mix creating failure points.
Thanks for letting us know why you haven’t done any videos on it. I was kind of wondering since there was a small niche on here that does express their interest.
I’ve come to find out that many battery types exist. As a consumer I never looked past rechargeable or not the rest was not a concern for me. The rust battery setup was mind blowing. Then came the nuclear diamond battery that just took what was left of it and vaporized all traces. Application is a big factor in battery type selection.
It wasn’t until I came here that I really started getting an education on batteries.
I live in MT where -20 degrees or lower is pretty common in winter. I want something more efficient than lead acid. I like the idea of a battery that doesn’t have toxic flammable components and is pretty environmentally friendly. I get there are ways to use lithium in cold environments. To me that is just another component in the mix creating failure points.
Thanks for letting us know why you haven’t done any videos on it. I was kind of wondering since there was a small niche on here that does express their interest.
I’ve come to find out that many battery types exist. As a consumer I never looked past rechargeable or not the rest was not a concern for me. The rust battery setup was mind blowing. Then came the nuclear diamond battery that just took what was left of it and vaporized all traces. Application is a big factor in battery type selection.
It wasn’t until I came here that I really started getting an education on batteries.
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