Regardless of whether you are stuck in a blackout and want to charge your phone or lost in the woods in want of some additional juice for your devices, the usefulness of a solar power bank cannot be overstated. Essentially, what I discovered is that the Tesla Powerwall competes on cost, while providing numerous positive aspects (it is a lot smaller per kWh, needs a lot less maintenance, is significantly prettier, can be hung on the wall, and a considerably higher quantity of the battery can be utilized without rapidly degrading the battery, for example).
And btw, yes, you do require to convert DC to DC when going from a PV array to a battery, at least if you want to so somewhat effectively the PV maximum power voltage will almost by no means specifically match the battery charging voltage. But if you have a SolarEdge inverter, I bet you have MPPT optimizers and what you require is the grid transfer switch and the appropriate hook up to automatically switch to battery backup when the grid goes down. I am also hopeful that flow batteries can compete properly in the future as projected, but the existing $ based on the Deutsche Bank report is clearly considerably greater.
I was replying to @ZShahan3:disqus’s claim that the Tesla battery can basically be tied to an existing PV inverter. I purpose that this is here so that any solar PV string can be hooked up to the battery and nevertheless charge the battery to the correct voltage. That sounds much more and much more like if you currently have solar and a SolarEdge inverter, you are most of the way there.
There is one particular other residential battery storage provider with some numbers to examine to Tesla’s supplying, but it did not seriously fit nicely into the table above and it did fit effectively in the second-to-last section below, so it is incorporated at the bottom there. Nicely, also note that Elon has stated the 7 kWh consists of a DC-to-DC inverter” and one’s house solar energy method would include the necessary DC-to-AC inverter, for up to ~four-5 Powerwalls. A battery program is pretty raw without having it. And it has a BMS as portion of the charge handle.
What I still see as imminent is the rewards of scale that Tesla is uniquely positioned to take advantage of. No one other household storage battery retailer is directly producing cells at the scale necessary for EVs…meaning that Tesla will be able to undercut just about anybody else’s pricing. There are some important Lithium based technologies left out that would cast the Tesla battery in suitable light. If you have been on that Texas plan where you get energy absolutely free at night, and use to time shift then it is a simple shift on sizing. This severely limits application #2, day-to-day cycling, as the battery could only be charged by the PV.