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From what I've read the sodium based does not have the energy density of the LiFePO 4 batteries.
It's funny, somewhere in the U.S.A. they did experiments on the best medium to heat with solar energy and after extensive testing found salt was not only cheap and plentiful it was also the best medium for holding the heat.
Battery technology does confuse me, how many years have they been around and we still revert to lead acid?
Seems like the lead acid was fit for it's purpose and development ceased to exist for 100 odd years. Now with the fight to go green we may finally get some new technologies to equal or surpass those old things. I often consider ultra capacitors in conjunction with a good battery for quick recharging. Honda/Toyota were working with CSIRO on battery/ultra capacitor automotive systems some years back, not sure what happened to it. Probably went the way of the quartz crystal storage medium shown on Towards 2000 (or beyond 2000, I forget) many years back, military use only me thinks.
Aldi have the good brand LiFePo4 100Ah batteries in stock right now, $449, far from cheap. I have a good battery box for astronomy but think I'll just save up for a Bluetti system eventually.
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