Reply to post: And all because

Elon Musk's Tesla set to unveil home storage battery

Anonymous Coward
Anonymous Coward

And all because

...Tesla need to build battery volume to drive down car production costs. The real (ie wholesale) price arbitrage on electricity over a few hours (less the 25-30% losses into and out of storage) is insufficient to pay the costs of home power storage system like this, but Tesla hope that ill-conceived solar subsidy programmes will mask the harsh realities.

As the article says, the system has been hawked around utilities and I suspect that they've run the numbers and they don't work except in niche situations *cough, cough, AC and all that*.

If you can launder the subsidies by using such a system, then you might have some small rationale for using it, but as I understand the rules both microgen and storage must switch off if the mains goes down, so even the theoretical value of UPS is not available.

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