Interestingly, the Powerwall's 2kW/3kW (2.7/4HP) discharge continuous/burst does not compare well versus a single 0.7kg Zippy Compact, which can do 25C*5A*24V = 3kW. Continuous. So, are these Tesla batteries really something new in terms of radically high energy density to power density, or is this an artifact of expected use/the electrical subsystem?
I'm rather surprised at how little power is provided from Powerwall; I was not expecting air conditioners or microwaves to pose a problem. Certainly it'd drain the battery quickly, but your outdoor AC is often 240V * 15A = 3600 watts. A microwave is 1.8kW.
In terms of power v. energy density tradeoffs, my Zippy reference leans hard into being energy dense. If you are looking at power dense, one might pick up a competing Turnigy 60C 6S 5Ah. A bit more expensive- $75 vs $51, a little more weight 864g v 703g, but continuous power density goes from 3kW (4HP) to 7.2kW (9.7HP), with a 10s burst to double that: 20HP- 5x as much as a Powerwall- in 1/116th the weight- woo hoo.
Recently, #PowerDense #Densities