Battery charge Voltage

[ozskippy]

Could i ask what your sounder shows as the voltage output of the battery when the motor is started and running. when i changed batteries the output went from 15.2volts on the old batery to 12.9 volts on the new battery. Also the guy that connected it intially put the wires on backwards positive to negative........I nearly had a hard attack when i saw him do it he reckons no drama it just blew the fuse... Anything i should look for ???????? what a professional!!!!!!!!!

[shortie]

yep thats what the fuse is there for. Its very unlikely any damage was done cause the fuse saved it. Its a very easy mistake to make, ive seen many a professional accidently put the polarity on the wrong way. In fact ive done it myself many a time.turn the sounder on before you start the motor. Check the battery voltage. Turn motor on check the voltage. What it the difference.

Start the motor and disconnect the battery. use a multimetre to check the motor output voltage.

[ozskippy]

when the motor is not running the voltage is 12.1 volts with the motor running it hovers around 12.8 does that sound low should it be charging the battery faster than that???? I thought it should be up around 14.4

[faulked]

i thought 12.7/13.7 was a nominal voltage for a healthy battery

but i am a gardner not a sparky

:S jason

[jeff f]

mine goes up to 14.8 at full speed

[Gazza]

I could be wrong here but charge is measured in amps and same with charge rates ???

Gaz

[ozskippy]

so the voltage output doesn't really matter???????????????