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post #1 of 10 Old 05-07-2015 Thread Starter
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Tesla's new power cell for houses

Just read about Elon Musk's new power cell for houses. Wondering if we'll be able to use one of these in the future for our sailboats.

Tesla's new bet: A home battery to slash energy costs

Also wondering what technology it will use. If enough houses adopt it, it might help reduce our storage costs.

(Still think the best way to store extra solar power is to lower your fridge and freezer temp during the day, make water, and heat your hot water -- after your battery bank is fully charged.)

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post #2 of 10 Old 05-07-2015
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Re: Tesla's new power cell for houses

there are just lithium-ion cells stacked and liquid cooled/controlled....much like what nigel calder has/had installed in his boat for design testing and documenting power rates and such.

Much ado 100 year old technology that is priced way out of line with what any one can afford. Perhaps down the road, IF PV panels and wind become price competitive.

They still need to be charged and recharged, they have limited lifespan and certainly a finite number of charge cycles. Electronic control, but even that has failed to regulate similar cells every now and then. And when these cells fail, they fail dramatically.

Get them for your boat now, as I believe they are in the $400USD and up range for a comparable size $100 lead/acid type. Controllers and chargers are pricey. and they don't like damp, corrosive environments according to Nigel in an article he did last fall.
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post #3 of 10 Old 05-07-2015
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Re: Tesla's new power cell for houses

These are supposed to be 10kw for $3,000. A deep cycle lead acid around here is going for about $100/kw ($120 for a 100amp*12v battery). But it will come in at about half the weight, and charge much faster.

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post #4 of 10 Old 05-07-2015
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Re: Tesla's new power cell for houses

Quote:
Originally Posted by kd3pc View Post
there are just lithium-ion cells stacked and liquid cooled/controlled....much like what nigel calder has/had installed in his boat for design testing and documenting power rates and such.
Nigel has not had Lithium batteries on his boat. His last bank was Odyssey TPPL AGM's and he is currently using & abusing the new Firefly Oasis AGM's.

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post #5 of 10 Old 05-07-2015
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Re: Tesla's new power cell for houses

The company or person who invents an efficient storage system for energy will be the next Bill Gates. Hopefully that technology will allow both homeowners and sailors a better chance to become energy independent without breaking the bank.
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post #6 of 10 Old 05-21-2015
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Re: Tesla's new power cell for houses

Mainesail, (or any other folk for that matter)

Please help me with the math here.

7Kw @ 350 - 450volts

What is the stored amps @ 12 volts? If that makes sense? Very interesting stuff. If millions start buying this stuff for home that will have a huge impact on costs.

Mainesail - How did the Li-ion testing go for you?

Powerwall | Tesla Home Battery
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post #7 of 10 Old 05-21-2015
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Quote:
Originally Posted by Rocky Mountain Breeze View Post
The company or person who invents an efficient storage system for energy will be the next Bill Gates. Hopefully that technology will allow both homeowners and sailors a better chance to become energy independent without breaking the bank.
Actually, they'll be the next Steve Jobs. The guy who steals the idea and markets it will be the next Gates.
Either way, we are all waiting!
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post #8 of 10 Old 05-21-2015
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Re: Tesla's new power cell for houses

If all you do is run off the battery during the day when electric prices are high and recharge at night when they are low you may eventually pay for the unit. Add solar to recharge them and you reduce use of fossil fuels.
I'm not an early adopter, but I'm hoping pricing becomes more attractive.

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post #9 of 10 Old 05-25-2015
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Re: Tesla's new power cell for houses

Kelly: In the consumption of electricity we are looking at watts, which is the product of amps x volts. Once you have the watt figure you can add a time figure to that to get your watts per hour consumption to determine the KWH figure (K being the metric symbol for one thousand). Then you may solve your equation. In the theoretical world you could use the 7kwh in one hour by applying a load of 7000 watts or 700 watts for ten hours. In the real world it usually isn't that clean but you can get an approximation.
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post #10 of 10 Old 05-26-2015
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Re: Tesla's new power cell for houses

I expect more good things to come from Tesla. I hope once their gigafactory is complete that the price of lithium rechargeable batteries drops dramatically. If it weren't for the high cost of batteries, I would have converted my Hunter to electric by now.
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