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Old 12-05-2018, 12:48 PM   #24 (permalink)
hayden55
Master EcoModder
 
Join Date: Dec 2010
Location: USA
Posts: 1,171

Sport Utility Prius - '10 Toyota Prius II
90 day: 52.98 mpg (US)

300k Sequoia 4WD - '01 Toyota Sequoia Limited 4wd
90 day: 20.19 mpg (US)
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Quote:
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. 😂
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