# GREEN battery tech... or a simple economic rip-off

#### kubeek

Joined Sep 20, 2005
5,621
Well, it apparently is full of salty water, no wonder it is huge. Wiki says that sodium ion batteries are big and heavy, but are cheap and polar bear friendly, which suits them for large installations like solar and wind power storage etc.

#### Kermit2

Joined Feb 5, 2010
4,163
$1,350 is CHEAP? You can get the same ampacity and voltage in lead acid for about$100 and less than half the weight and one quarter the physical size.

Stainless steel, manganese oxides and salt water. All very very cheap compared to lead metal prices.

So are you paying for product or just to feel good about the choice?

#### nsaspook

Joined Aug 27, 2009
6,478
It's really GREEN, it quickly transfers the Green from your pocket into their pocket. They have a small useful application space for bulk storage (round-trip energy efficiency of 85 percent, that's actually very good) but the lower energy density and higher cost seem to be limiting factors for wider use.

https://energymag.net/round-trip-efficiency/

#### Kermit2

Joined Feb 5, 2010
4,163
It doesn't use any special space age, or nanotechnology.
No special manufacturer for exotic materials involved.
No rare earth's or other scarce resources used.

What justifies the 1000% mark up other than greed and BS.

#### wayneh

Joined Sep 9, 2010
16,114
It may have a legitimate niche market. I'm not in it, that's for sure.

How does it compare to one of Tesla's home battery packs? That may be a lot closer to the target market, which might be sympathetic to the green angle.