Tesla's 10 kilowatt home battery

[Seraphim]

I'll let some electrical whiz run the real numbers, but just thinking offhand.  At 12v, I figure this is about an 833ah battery. Weighs 200 pounds and costs $3500, gauranteed for ten years. An Agm battery setup - at approximately 1/2 the capacity and probably slightly higher weight might cost about $800.  Haven't done the research lately. But if one had to replace the AGMs very four years, the ten year cost would be about $2400.  For an 800 ah AGM bank, double the cost ($4800) and the weight (about 480 lbs, perhaps?). Just thinking...

That one battery would last us a month without a recharge lol.

 

[Seraphim]

http://www.teslamotors.com/powerwall

 

[Seraphim]

Just a quick check - 8d AGMs (about 200ah) run about $400 on an average and weigh about 167 lbs each.

 

[mariasman]

I understand the 10 KWh version is not rated for daily use but backup power only.

http://arstechnica.com/business/201...ons-for-the-powerwall-but-use-case-is-narrow/

So, the 7 KWh battery should be considered at roughly $440 per rated KWh of storage, and that's the cost to installers. The retail cost to the consumer will be more.

Also, what is the battery voltage? Is it compatible with conventional off grid inverters, or will one have to purchase a Tesla unit (do they exist)? Or, is it suitable only for grid-tie inverters (Tesla unit only)?

Limited, but it's a good start I suppose... well, A start. Still, I can get an industrial lead acid battery at $130 per rated KWh (rated at 2000 full cycles). If I'm going off grid in a stationary setting, then a good industrial flooded lead acid battery still seems best to me.

 

[corky52]

I used to build my own computer systems from scratch, then the Apple II came along, non-specialists and people other than hobbyists could have small computers.  Much of the same applies here, the Tesla system brings a simple to use, low maintenance system down to the cost where many people can both afford and use it.

Corky

 

[Canine]

I used to build my own computer systems from scratch, then the Apple II came along, non-specialists and people other than hobbyists could have small computers.  Much of the same applies here, the Tesla system brings a simple to use, low maintenance system down to the cost where many people can both afford and use it.

Corky

 

[Canine]

I have to say,I was disappointed in Musk's announcement.833 Amps @ 12 v for $3750 is pretty wimpy.I have 1300 amps of wet cell batteries and they only cost $1500.He needs to improve his technology fast.I was hoping for a major breakthrough.

 

[LeeRevell]

It's newer tech, so currently expensive. Twenty years from now, when the EPA's Secret Squirrels have mandated such battery technology for ALL new construction homes and commercial buildings, then the price will drop a major degree. Remember the CB craze? One year they cost hundreds, the next, they were under a c-note. Same with CD players - A buddy's $300 pocket music player was, the next year, priced at $30. All tech starts high then drops. And eventually Tesla's wonder battery will be replaced by something else - portable plasma field generator maybe? Or a micro-sized cold fusion reactor? Teslas will be a dime a dozen on fleabay then.......

 

[blars]

To be fair to Tesla, that's probably usable Amp-Hours and designed to stay at that capacity for years. Lead-Acid is at best 50% usable, and won't even stay at that if cycled to that regularly.

 

[Seraphim]

IIRC, and I've been offline lately, the voltage for the units is 300 to 400 volts - what I read didn't specify input or output. I'd assume both until I read different. The AH figure is mine, and is subject to scrutiny. Like Corky, I used to to mess with old 70s models computers, and could make a 6409 home computer multi-task lol. But looking, as I am, at a mobile application, the weight savings intrigues me; yes, it would need some non-commercial solutions, but nothing I foresee as an obstacle.

To power a house, yes it's used as a daytime alternative to more expensive rates, but in an enviroment where I generally use 25-30 ah a day, well, as I said I find the prospect intriguing. Solar charging might be slower - not sure about the charging voltage however. Needs thought.