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Critical Battery Drainage Protection

Greetings! I have a brief comment, suggestion and question for tesla owners. I believe that within the specific context of this suggestion, it MAY provide some additional level of protection to tesla owners and tesla motors, while improving the desirability of ev's by addressing a large concern regarding critical maintenance of batteries.

Today, while shopping for a tesla, I read an article informing the public of stories regarding tesla batteries becoming damaged due to critical battery discharge whilst cars where in storage. Although Tesla may be legally protected from these occurrences, this is an unfortunate and avoidable accident that could become more and more common - and potentially harm public motivation to invest in battery powered cars. This story certainly caused me to rethink my motivation to invest in EV's. I am aware that if a battery is to become critically discharged it may be permanently damaged requiring very costly replacement. Im also aware that this is not a warranty issue in tesla models. I can understand the position tesla is in regarding these matters, though it is certainly in everyone's interest that more is done to avoid this from occurring to others..

Although the vehicle's effective surface area may be inadequate to function as solar surface to fully re-charge tesla batteries in reasonable time, it may be great enough to serve another critical purpose. ... Would a roof-integrrated solar panel be adequate to provide some Minimal level of charging for the sole purpose of battery drainage protection?

It seems that the benefit of this kind of protection may appeal to the public, further the image of sustainable efforts, and while it would initially increase the production and development costs of the car, it may provide a solid long term solution to the problem and help avoid any more unfortunate stories of "bricked" EV's.

What do you think? Would a little solar battery protection be something of value to you?

- Formosa West

For comparison's sake, Fisker's roof panel was rated somewhere in the half a kilowatt-hour per day range. Assuming the car is stored outside and it is sunny all day, every day, it would still not produce enough power to offset even the slightest amount of vampire loss incurred during storage.

Once battery closes to empty that vampire loss reduces a lot. 500Wh Should be enough to prevent bricking. I would prefer a bit different solution than Fisker though (cheaper but also a bit larger Solar panel).

If I recall correctly car loses about mile/day. That's 300Wh, so 500Wh is more than adequate assuming you park outside and live in sunny region of the planet. Not useful to me, but could be useful to someone else.

So, as an option (with explanation what you really get with it)

If you are storing the car long-term; leaving it in the sun is a very bad place to do so.


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