Sodium Ion Batteries

This is the 'salt water battery' the world has been waiting for! Now available in NZ the AquionSodium Ion Battery.

S-Line products deliver extremely long cycle life, deep depth of discharge and excellent abuse tolerance. The batteries

These are now available. I wonder what they cost.

This looks to good to be true.

I looked at it a while ago. Some things I noted:

 

1. This takes a LOT of floor space for the same capacity (ie energy density is low).

2. Can't charge or discharge very fast, so you'll need a lot of it to handle peak charge/demand

3. Cost per kwh is comparable to lead acid, but due to point 2 above, initial investment is a barrier to entry.

I see that the 2kw/h can only supply 450 W and can only be charged at 20 A

They need to improve the anode and cathode tech