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Re: Battery and Alternator capacity should be matched.
Posted by AndersOZ [Email] (more from AndersOZ) on Tue, 14 Mar 2006 17:37:11
In Reply to: If you only need 35 amps, it only makes 35 amps, so...., Chaz, Sun, 12 Mar 2006 21:10:51
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An alternator will, immediately after start, try to bring the battery back to full voltage as fast as possible. This means that a 120 amp alternator will push close to 120 amps through the cables to the battery and put a much higher load on the engine. If the battery capacity is to small the plates in the battery may be deformed and the battery permanently damaged.
When the battery reaches its nominal voltage the current will adjust to what the ignition and auxillaries need.
When replacing the alternator the battery - alternator cables must be upgraded and a battery with a suitable capacity, min 60 Ah, installed.
Anders
posted by 203.19.8...
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