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Off-Grid System from a Tesla 85 kWh Battery

Tesla Motors 85 kWh Lithium-Ion Battery Pack "No User Serviceable Parts Inside? Yeah, Right!"
Tesla Motors 85 kWh Lithium-Ion Battery Pack “No User Serviceable Parts Inside? Yeah, Right!”

Now, before we get started, we need to cover the basics of safety, prudence, and good sense and say of this Tesla Motors Off-Grid system project, “Do not attempt this at home.”

Of course, we can forget all that safety crap and jump right in, at least vicariously, through the eyes of a Tesla Motors Club enthusiast with a penchant for off-grid renewable energy living. The plan was “simple,” if you could call it that, basically requiring a backup energy storage device for an off-grid solar power installation, for which the 85 kWh 400 V lithium-ion battery pack would function nicely, albeit with some *cough* warranty-administrator-mortifying modifications. After all, the battery pack’s new life as renewable energy backup storage will not be powering any electric motor generators or accepting a charge from a Tesla Supercharger.

The Tesla Motors lithium-ion battery pack was sourced from a salvaged Tesla Model S 85 kWh, although the author does not mention for how much. An unscathed, except by the ravages of time, about a month since last use, Tesla Motors 85 kWh battery pack then lay ready for adulteration, which proceeds with all due safety precautions, including removal of the main fuse, high-voltage charge / discharge controller, and the top cover.

The author uses the phrase “built like a tank” to describe how well the battery pack seems to be assembled. Indeed, it was designed to shrug off most road hazards, except for a couple of isolated highway incidents and what can only be described as an alcohol-fueled attempt at suicide.

The teardown of the Tesla Motors pack was a long process but, at least up until this point, is now entering testing phases as a solar power backup solution for an off-grid system installation. Apparently, he is in New Jersey right now, and I kind of wish I was back there to swing by his place to look at it.

Photo credit: Martin Gillet

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