Prius (Gen 2) :: Battery Fills Up And Engine Brake Kicks In


Aug 25, 2012

My daily route includes the following road segment,

5 km steep climb (30 mph, 50 kph)

3 km fast downhill (60 mph, 100 kph)

4 km fast climb (45 mph, 70 kph)

6 km steep downhill (40 mph, 65 kph)

The speed between parentheses is the traffic flow speed for each segment.

Even though I tried varying the driving speeds and styles, a constant problem I have is , Before starting the final descent, my battery is almost full. Half way down the hill the battery fills up and the engine brake kicks in, which means energy is wasted.

1. Will the battery be affected in time by the fact that it fills up to 80% repeatedly?

2. If I drain the battery on the last climb by slowing down and switching to electric and then fully recharge it on the descent (and avoid engine braking), will this reduce the battery's life span?

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