New LG lithium batteries $600 per KWH

I am surprised no one on here has mentioned the newer LG Chem RESU lithium ion batteries. They have managed to pack an insane amount of energy into a very small package at a relatively reasonable price. These have been in Europe since late last year, and are about to hit the US market soon.
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Basically there's 3 different packs that will be offered. 3.3kWh / 6.5kWh / 9.8kWh. All packs can be daisy chained up to 2, which means you can have a maximum of 19.6kWh from two of the largest ones chained together.
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The weight and measurements of these things are what is most impressive. The 3.3kWh pack, for instance, weighs just 31kg and it has a useable capacity of 2.9kWh. Compare that to, for instance, a Lifeline AGM battery which weighs 71kg but only has a usable capacity of 1.5kWh. Basically, for 31kg you can get the same amount of battery that could weigh 142kg.
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Yes, the price of the lithium ion battery is significantly more, but for weight related savings these LG Chem's are very impressive and they guarantee that Tthey will last for 6,000 cycles or 10 years and maintain 80% of their original charge which seems unbelievable. They weigh far less than any other LifePO4 batteries on the market and the technology they use for the BMS is very advanced. These are super safe batteries not some jerry rigged custom made lithium ion design. The people who will benefit most from these are full-timers who use their rig every single day and pump out tons of cycles. You could do 2 full cycles a day with these and they would still last about 10 years.
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Here is a PDF with the dimensions and specs. http://solarjuice.com.au/wp-content/...obal-small.pdf
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Also there is an interesting youtube video showing installation and an up close look at just how reasonably sized these are: https://www.youtube.com/watch?v=HzR4AVJFXBE
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FInally, regarding the price of these... and the best part of all... is they are going to sell for about $600 per kWh. Compare that to current offerings on the market from places like amsolar or Simpliphi which are about $1200 per kWh and these are basically going to cut the price of Lithium ion batteries in half!. If you've been thinking about going lithium ion, keep your eye out for these!