The conversion of my garage to solar power is completed and hopefully it will decrease my utility bill. My general believed is that Tesla has very a competitive product, and its charges will continue to come down and get increasingly tough to beat, but there’s still a lot of threat inherent in this nascent market place — and it’s truly numerous markets (property storage, commercial & industrial storage, utility-scale storage, and battery management as effectively as battery hardware).
Generally, what I located is that the Tesla Powerwall competes on price tag, even though offering several advantages (it is significantly smaller sized per kWh, needs considerably much less upkeep, is a lot prettier, can be hung on the wall, and a much greater quantity of the battery can be utilized without having rapidly degrading the battery, for example).
I was replying to @ZShahan3:disqus’s claim that the Tesla battery can just be tied to an existing PV inverter. I reason that this is here so that any solar PV string can be hooked up to the battery and nonetheless charge the battery to the correct voltage. That sounds far more and a lot more like if you currently have solar and a SolarEdge inverter, you are most of the way there.
Tesla has emphasized a couple of times that one particular of the big advantages of this is that it contains anything,” barring the inverter that a solar system would currently have so is pointless to include things like. Adding a battery to an existing inverter can’t perform effectively unless it is connected to a separate DC input (some inverters have many independent MPPT), or following the MPPT (like in optimizers-primarily based systems).
The Powerwall’s output is limited to 2kW, which means that an added battery ought to be purchased for every 2kW of desired energy output – ought to the added storage capacity be wanted or not. The MPPT optimizer function is at the input of the DC-DC exactly where it finds the optimum voltage for the solar PV for max VI or energy. The solar city statement on Hawaii is a clear shot across the bow to HECO that they are not going to drop any shoppers due to HECOs ban on new solar grid ties. If the input provided is the similar as the load, the battery has no impact at all.