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Old 05-01-2015, 10:28 AM   #1
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Tesla unveils 7kw battery pack for $3,000

Tesla has shown their new Powerall battery pack that will be available by the end of the summer. Here is an article in the dailymail.co.uk with more information. Will RV manufacturers adopt this technology to replace generators?


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The Powerwall is around three feet wide and four feet tall, weighs 220lbs, and can be installed either on an outside or inside wall of a home.
The 'daily use' version has a capacity of 7 kilowatt-hours, which is around a quarter of a home's daily usage.
Read more: Tesla's Elon Musk unveils power pack that could slash your electricity bills | Daily Mail Online
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Old 05-01-2015, 10:44 AM   #2
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You still need a generator or large solar array, to charge it up.
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Old 05-01-2015, 10:53 AM   #3
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Originally Posted by twinboat View Post
You still need a generator or large solar array, to charge it up.
Charge and recharge it at home or an RV park. There are some Class B owners that have been doing this with inferior battery installations for quite awhile.
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Old 05-01-2015, 11:00 AM   #4
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One day rooftops, roads and driveways will be covered with solar panels that can be walked and driven on to produce energy, the shadow problems on part of a panel will be overcome and there will be plenty of power as technology marches on. There may even be tiny power plants similar to those used in spacecraft. Thorium will probably be huge in the area of tiny systems and thorium is found in great abundance.
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Old 05-01-2015, 03:16 PM   #5
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I still prefer my Dilithium Crystal's.
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Old 05-01-2015, 03:21 PM   #6
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I'm sure it will have some use eventually, but we don't get charged more during the day than at night, so no savings for us. I heard big business might get more of a savings if they can reduce higher daytime prices.
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Old 05-01-2015, 03:23 PM   #7
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Old 05-01-2015, 05:51 PM   #8
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This would be an interesting RV application but can you carry enough solar panels to make use of a 7 or 10 kWh battery? It was meant for homes for load shifting. Charge during the day and use at night. In commercial installations they could be completely off grid if they had enough roof space. Read about it: Press Kit | Tesla Motors
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Old 05-01-2015, 06:03 PM   #9
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...charge during the day and use at night. ...

Actually, it would be expected to charge at night, and use during the utility company "peak hours" during the day to power appliances.
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Old 05-01-2015, 06:09 PM   #10
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Quote:
Originally Posted by harryc View Post
This would be an interesting RV application but can you carry enough solar panels to make use of a 7 or 10 kWh battery? It was meant for homes for load shifting. Charge during the day and use at night. In commercial installations they could be completely off grid if they had enough roof space. Read about it: Press Kit | Tesla Motors
"Gone with the Wynns" blog has an article where they discuss solar and battery needs. In the post they call minimal usage 200 watts of electricity a day. With what they call moderate which included two hours of TV a day they needed something over 1kw. If I could survive with 500 watts a day while boon docking and only had to recharge every two weeks that seems like a winner to me. No solar panels, no generator and no fuel needed. Less initial cost, no maintenance issues (?), no fuel cost, quantity or storage issues. Did I mention the biggies to me? No noise or fumes emanating from a generator.
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Old 05-01-2015, 06:50 PM   #11
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I wonder if these are lithium based batteries? Raises all sorts of safety questions. If you have ever seen a lithium ion battery burn, it's not pretty!
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Old 05-01-2015, 09:48 PM   #12
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I wonder if these are lithium based batteries? Raises all sorts of safety questions. If you have ever seen a lithium ion battery burn, it's not pretty!
I have heard of Chevy Volts and Fiskers catching fire but never a Tesla. I take that back here is a NY Times article about Tesla fires caused by striking road debris.

On the counterpoint here is a thread at the Tesla forum where they are discussing how many internal combustion engine fires there are in comparison to EVs. None of those make it in the headlines. One interesting point someone makes is that at any given moment there are 17 ICE cars on fire. FWIW
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Old 05-02-2015, 11:23 AM   #13
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And what is the ratio between ICE and Electric cars?

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Old 05-02-2015, 05:20 PM   #14
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Let's see... 1 volt x 1 amp x 1 hour = 1 watt-hour, so 7kwh @ 12v is about 583 amp-hours. My 4 deep cycle Group 31 AGMs deliver about 420 AH @ 12v, so if I add two more batteries I get about 630 AH @ 12v or 8000+ KWH. That would cost me about 6 x $200 or $1200. Why am I not excited about this new battery for RV use?
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