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| | | Joined: Nov 2007 Posts: 98 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2007 Posts: 98 | another dumb question. i have a 41 1/2 ton with a 54 235. i'm converting to 12 volts and i'm looking for a 12v voltage regulator. i was looking at autozone's vr602 and vr1261. both say they will keep voltage between 13.5 and 14.5 but don't specifically say they're for 12 volt systems. will one work better? should i look elsewhere? thanks, joe | | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | A 12 volt battery needs an input voltage above 14 volts to keep it charged properly. Battery charging is like two football linemen shoving on each other. Unless one pushes harder than the other, they just stay put at the line of scrimmage. The generator must develop enough higher voltage than the battery to force charging current into it. Since a fully-charged lead-acid battery cell produces about 2.1 volts, six of them connected in series will have an open-circuit voltage of about 12.6 volts. The generator or alternator needs to make 13.5-14.5 volts to assure that the battery stays fully charged.
You'll need a 12 volt generator and the corresponding regulator for your conversion. Simply installing a 12V regulator will not make the 6V generator produce the higher voltage. I'd strongly recommend installing an original-equipment Delco regulator, even if it's a good-condition used item rather than using a Chinese-made aftermarket item. They've got a huge failure rate right off the shelf and/or a very short useful lifespan. Ebay has plenty of OEM regulators available, and the cost isn't bad if you do some careful shopping.
Jerry
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| | | | | Joined: Nov 2007 Posts: 190 Shop Shark | | Shop Shark Joined: Nov 2007 Posts: 190 | Im not familiar with those part numbers but one would have to assume they are for a 12 volt system with those kind of numbers....13.5 and 14.5. I do know that regulators come with different amperage ratings. If your using a later model 12 volt generator it may be nice to know what amperage output it is capable of. If it is a typical mid 50s 30-35 amp generator and you install a 20 amp rated regulator your generator will never put out more than what the regulator will allow it to...20 amps. So if output is important to you this is something to consider. | | | | | Joined: Nov 2007 Posts: 98 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2007 Posts: 98 | | | |
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