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Old 12-05-2018, 12:48 PM   #24 (permalink)
Master EcoModder
Join Date: Dec 2010
Location: Arkansas
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Sport Utility Prius - '10 Toyota Prius II
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90 day: 37.35 mpg (US)

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Originally Posted by JRMichler View Post
Your charging system is designed for people that never kill the engine to coast. When I was commuting 3 miles each way to work, a good part of each trip was engine off coasting. I found that I needed to put it on a charger once a week to top up the battery. I learned this after a dead battery episode. A 2 amp charger is large enough if you use it often enough.

If the voltage is holding over 14 volts, the alternator is working correctly. If you monitor the voltage when on a charger, the charging voltage will gradually increase to 14.8 volts, hold there for a while, then drop to 13.3 volts and maintain at the level. That's what is needed to fully charge your battery.
It seems crazy that it works like that doesn't it. On my old 96 civic I eoc with clutch kicks if I kept moving to restart, and I would restart at stop lights and I never noticed any battery issues. The Prius also EOCs a lot but has a yuge charging system. I have been pretty pampered to this point with those examples. 😂
"I feel like the bad decisions come into play when you trade too much of your time for money paying for things you can't really afford."
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