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Monday, December 23, 2013

Nissan Leaf Usable Capacity

My Nissan Leaf Forum • View topic - Leaf Spy and Leaf Spy Pro (previously Leaf Battery App): "Yes, the lower Wh figure per GID is to reflect usable battery capacity. The 80 Wh are stored energy, which is also what most of the instruments index. This is because it's difficult to estimate battery losses upfront. That depends on the discharge current and vehicle speed, among other things. When you multiply 281 GID by 77.5 Wh, you will get 21,777.5 kWh of usable capacity. It's worth noting that the last four or five GIDs are not accessible to us, which leaves us with 21,390 kWh. That's a very close match to 21,381 kWh NREL has determined in their tear-down analysis. Drivers typically use 21 kWh as the standard figure for usable capacity, which can be multiplied with energy economy for range prediction."

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