OP
gripper180
DIY
- Reaction score
- 0
the battery is fine. i dont have 19 volts in battery. i have 19 volts across the terminals when revving engine. battery is 12.7 volts. spot on.
Discuss over charging 65 jaguar s type in the Auto Electrician Forum area at ElectriciansForums.net
sorry if im confusing things. start again. if i test battery with multi meter i have 12.7 volts (ok) if i leave meter connected to battery and start car it charges at 18.3 volts at 1500 revs and 19.3 volts at 2000 revs and will probably rise if revs go higher. i have tried 3 regulators and all read exactly the same. with these figures it will cook the battery.Sorry, could you clarify - Post#1 "18.3V at the battery"
Post #11: 19V "across the terminals" but 12.7V at the battery.
Exactly what terminals is 19V across? Presumably not the battery leads off the battery, cos isn't that what you'd expect?
Do you have a figure for what the charging current is at the moment?
Thanks for the clarification.sorry if im confusing things. start again. if i test battery with multi meter i have 12.7 volts (ok) if i leave meter connected to battery and start car it charges at 18.3 volts at 1500 revs and 19.3 volts at 2000 revs and will probably rise if revs go higher. i have tried 3 regulators and all read exactly the same. with these figures it will cook the battery.
bothThanks for the clarification.
I am gobsmacked that you can get 18V across a 12V battery. I can't see how that is possible with a properly healthy battery, the battery chemistry should be clamping the voltage around 14.5, and it should take hundreds of amps to raise it above that, if it could even be done.
Are you measuring the 18V directly on the pillars of the battery when charging, or using the chassis for a connection?
I was hoping someone with more knowledge of lead acid batteries would be along to say "18V is impossible", but so far not!
So the voltage across the battery posts actually gets to 18/19 volts, and we can't blame a corroded connection somewhere?both
Having a fault like you have where a 12 volt lamp having 19 volts across it is far worse.neg earth not the only downside, alternator pumps out 45 amps instead of 30 amps and that not good for old wiring or electrical parts that were made to cope with 30 amps.
Reply to over charging 65 jaguar s type in the Auto Electrician Forum area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.