I recently wrote about how my parents could save money by going off-grid in sub-tropical Queensland under close to best case conditions, and how it made no sense at all for them to do this as the return from having grid connected rooftop solar is so much better.
The recently announced Tesla Powerwall doesn’t change this. However, it will still be a very useful option for people who have no choice other than to live off grid, and for those who want to go off grid for non-economic reasons. It has a number of advantages over currently used lead-acid batteries, and in my opinion, for many applications the Powerwall knocks lead-acid batteries into a cocked hat, which will soon be squashed very flat, as lead-acid batteries are really heavy. [Read more…]
Currently Raging Debates: