It is estimated that batteries have now been with man for a lot more than 500 years. Right here is a great photo that shows the internal components of the Lithium Iron battery and Battery Management System. The NCA battery has nowhere close to the energy rating of an A123 battery or a Winston battery that can simply do more than 5C. So its a characteristic of the cell chemistry that determines the ratio among power and energy. In the end I believe the raw cost per Kwh of the Tesla battery alone at 7kwh for 3000 at minimum of 5000 cycles” is significantly less than 9cents per kwh. It doesn’t matter what the battery kw power rating is if the program is grid tied.
But in order for the PowerWall to function (use AC electrical energy from the grid to charge its battery and discharge battery energy to the house and/or grid), IT WILL Need to have A HYBRID (NOT SMART”) INVERTER & CHARGE CONTROLLER. This unfortunately remains accurate when adding a battery technique in parallel to the PV array: MPPT now adjusts to the combination of PV + battery (charging or discharging), so the far more current gets added/subtracted by the battery, the further off the PV array itself will operate from its maximum energy point. All I would add for now is that it may well be less complicated to merely examine battery costs devoid of other components.
There are factors that go far beyond the per-kWh …Read More