Tesla has finally taken the wraps off Tesla Energy, its ambitious battery system that can work for homes, businesses, and even utilities. The system breaks down into two separate products: the Powerwall is a home battery system, that comes in a 10 kWh version for $3,500, or a 7 kWh model for $3,000. The unit is about three feet by four feet in size and six inches thick, and comes with integrated heat management and  can fit either on the inside or outside of the wall of your home. The system is connected to the internet — Elon Musk said that the system can be used to create „smart microgrids“ — and can be used as a redundancy system, or potentially allow a home to go off the power grid entirely. „The whole thing is a system that just…

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