138 karma · joined August 13, 2013
"So to get 1 kWh of usable storage in a lead acid battery you are looking at spending closer to $800. This makes the Tesla more like 2/3 the price per ‘usable kWh’ compared to good quality sealed lead acid batteries. Not bad. But wait, there’s more…
2) Battery Life The Tesla battery comes with a 10 year warranty and an optional 10 year extension. This is huge. Most lead acid batteries come with a 1 year warranty. Let’s assume the battery gods smile upon you and your lead-acid battery lasts as long as it’s specification (1,200 cycles). You have only got 3-4 years out of it until you need a new one.
If your Tesla battery is going to last 3 times longer, then its practical cost over 10 years is actually less than a quarter of a comparable lead acid battery. Now we’re talking!"
I'm going in the other direction. Used to always wait one or two versions before upgrading and always doing a clean install. I installed bot Mavericks and Yosemite over the older versions early on without any problems.