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The Tesla PowerWall comes with a ten year warranty. Assuming a charge and discharge every day, that's 3560 cycles... but this kind of batteries can probably han
by murbard2 11y ago
The Tesla PowerWall comes with a ten year warranty. Assuming a charge and discharge every day, that's 3560 cycles... but this kind of batteries can probably handle 500 full cycles at best. What gives?
- fredkbloggs 11y agoAs noted in the article (but not explicitly enough), the 10kWh unit is rated for weekly cycling, which would be 520 cycles. The 7kWh unit is rated for daily cycling, but it's unclear whether that really means every day (3653 cycles) or "most days" which could be anywhere from 1500 on up. Remember, offering a warranty is probabilistic: you might be willing to service (or, more realistically, offer some kind of pro-rated replacement discount on) 5% of the units under warranty in order to offer that headline term, knowing full well that the other 95% of customers won't push the product hard enough. Besides, that might be 5 or 6 years off; by then you could own the market and find it inexpensive to buy off those unhappy early adopters.