The following diagrams illustrate how to get elevated present (more energy) by using parallel wiring and how to boost voltage levels by utilizing series wiring. I was replying to @ZShahan3:disqus’s claim that the Tesla battery can simply be tied to an existing PV inverter. I reason that this is right here so that any solar PV string can be hooked up to the battery and still charge the battery to the appropriate voltage. That sounds more and more like if you currently have solar and a SolarEdge inverter, you are most of the way there.
But in order for the PowerWall to perform (use AC electrical energy from the grid to charge its battery and discharge battery energy to the home and/or grid), IT WILL Require A HYBRID (NOT SMART”) INVERTER & CHARGE CONTROLLER. This sadly remains correct when adding a battery program in parallel to the PV array: MPPT now adjusts to the combination of PV + battery (charging or discharging), so the a lot more existing gets added/subtracted by the battery, the further off the PV array itself will operate from its maximum power point. All I would add for now is that it may be easier to just examine battery costs devoid of other elements.
Right here is a fantastic photo that shows the internal components of the Lithium Iron battery and Battery Management Program. The NCA battery has nowhere close to the energy rating of an A123 battery or a Winston battery that can effortlessly do a lot more than 5C. So its a characteristic of the cell chemistry that determines the ratio amongst power and energy. In the finish I believe the raw price per Kwh of the Tesla battery alone at 7kwh for 3000 at minimum of 5000 cycles” is less than 9cents per kwh. It does not matter what the battery kw power rating is if the system is grid tied.
And btw, yes, you do will need 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 energy voltage will just about 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 need to have is the grid transfer switch and the correct hook up to automatically switch to battery backup when the grid goes down. I’m also hopeful that flow batteries can compete well in the future as projected, but the existing $ based on the Deutsche Bank report is clearly a lot higher.
I am pretty particular that you will need to have to install a second off grid inverter and AC couple that inverter to your current inverter or DC couple a second off grid inverter to your solar array. Batteries, desirable packaging, battery management program, inverter, integration, loads and loads of firmware controlling the batteries in harmony with the electrical loads in a house, seamless integration with a new or pre-existing solar method.