If you went on to check Tesla's official Powerwall website (or even their press kit) lately, you might have taken notice that the company removed all information on its 10-kWh home battery. The only thing remaining on the website is Tesla's smaller, 6.4-kWh option intended for daily cycle applications.

Initially, the decision to remove all reference to the larger battery was not accompanied by an official statement, revealing the cause, however last week, a Tesla representative finally confirmed that the 10-kWh battery has indeed been discontinued.

Tesla's statement to Green Tech Media (GTM) reads: "The Daily Powerwall supports daily use applications like solar self-consumption plus backup power applications, and can offer backup simply by modifying the way it is installed in a home. Due to the interest, we have decided to focus entirely on building and deploying the 7-kilowatt-hour Daily Powerwall at this time."

At the same time, Ravi Manghani, senior energy storage analyst at GTM Research, commented that "even some of the deep cycling lead acid batteries offer 1,000 cycles and cost less than half of the $3,500 price tag for Tesla Powerwall. For pure backup applications only providing 500 cycles, lead acid batteries or gensets are way more economic."

As stated previously, the Powerwall website still offers Tesla's $3,000-worth 6.4-kWh battery (not 7-kWh, as usually marketed), claiming a 100 percent depth of discharge and a life span of cca 5,000 cycles. Moreover, Elon Musk stated in January that a new Powerwall option is coming to the market "probably around July, August this year" – it is not clear yet, however, what exactly will the new option be like.