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RV-Dreams.com Home -> RV-Dreams Community Forum -> Boondocking, Solar Power, and Related Items -> Tesla's new "PowerWall"
Post Info TOPIC: Tesla's new "PowerWall"
BiggarView


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Tesla's new "PowerWall"
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Any techies want to chime in on Elon Musk's new PowerWall.

Here's some specs, obviously it won't fit into some existing battery compartments, but that is not an insurmountable obstacle.  No word on the weight of the battery. I don't know how that would all convert to amp-hours for RV use.

Energy: 7kWh or 10kWh

Continuous Power: 2kW

Peak Power: 3kW
Round Trip Efficiency: >92%
Operating Temperature Range: -20C (-4F) to 43C (110F)
Warranty: 10 years
Dimensions: H: 1300mm W: 860mm D:180mm (52"x34"x7")

 



-- Edited by biggaRView on Tuesday 5th of May 2015 03:42:49 PM

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bjoyce


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7kWh is 7000 watt-hours, so it would be 7000/12 (volts) or 583 amp-hours.

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MarkS


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The website claims 350 to 450 volts. That puts capacity in a whole other universe. 7kwh at 350 volts?

they are 51" tall and 7" thick. I wonder if they can be disassembled and reassembled in different more RV friendly dimensions.  I imagine so.  

http://youtu.be/yKORsrlN-2k

-- Edited by MarkS on Friday 1st of May 2015 10:02:34 AM



-- Edited by MarkS on Friday 1st of May 2015 10:56:58 AM

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Technomadia


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Chris actually posted about this on the blog today: www.technomadia.com/2015/05/teslas-lithium-powerwall-awesome-but-not-for-rvs/

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BiggarView


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I wonder if 5 or 6 of them lined up like books in the engine bay in place of the diesel would be enough power to move the coach any practical distance?



-- Edited by biggaRView on Friday 1st of May 2015 10:59:00 AM

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2020 Keystone Montana Legacy 3813MS w/FBP ,MORryde 8k IS, Kodiak disc brakes, no solar  YET!
Bill and Jodee


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At 4 ft x 3 ft and the requirement to be upright they don't seem like an option YET. Still, I don't think it will be long before the car battery and the house battery have a baby known as the RV battery. That's a delivery date we can all look forward to!!!

Jodee

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Selah


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Some more math on BJoyce post.
Lithium ion batteries can be discharged safely to 20% where current lead-acid batteries can only be discharged to 50%. The Tesla Powerwallcan effectively produce 466.4 amp-hours (583x.8) To achieve that same output you would need 932.8 amp-hour (gross) of lead-acid batteries or a little over 8 T105 batteries.
Of course with a ten year life that's double that of a lead-acid battery. I am also ignoring any increase in efficiency that may be afforded to the Powerwall.



-- Edited by Selah on Tuesday 5th of May 2015 01:43:18 PM

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bjoyce


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Selah: I was assuming the 7kW was the usable capacity, or 80% of the battery capacity. I run Lithiums in my RV.

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