One 12V auto battery starts our boats Volvo Penta inboard motor, but when i try to connect anouter 12V battery in parallel to the first, and the key is turned, all lights on the dash go out as if the battery is disconnected... after returning the set-up to the original one battery configuration, the engine starts normally with the key... ???
2007-06-25 21:20:31 · 7 answers · asked by Wbornio 2 in Cars & Transportation ➔ Boats & Boating
If they're in parallel, the voltage would still be 12V. He would have to wire them in series to get 24V. I don't know why it won't function. Have you tried each battery separtely? Perhaps the second battery is bad and when you connected it, it created an open circuit.
2007-06-25 22:14:06 · answer #1 · answered by flyboy77s 1 · 0⤊ 0⤋
Be sure you are connecting in parallel and not in series. If, you connect batteries in series you double the voltage to 24 volts.
The link may help you understand. Here the pictures use 6 volts. just think 12 and 24 and it the same thing.
http://www.zbattery.com/seriesparallel.html
Some boats have a circuit breaker and if you connecting 24 volts it throw the breaker. Usually you see it easy to access if you have to reset manually. It have a big red button about the size of a big pencil eraser. Some are just a small silver looking box in the cables between the battery and wires.
2007-06-26 01:57:08 · answer #2 · answered by Snaglefritz 7 · 0⤊ 0⤋
Almost certainly the second battery is either dead or in desparate need of a charge and it is draining power out of the good battery. I assume you are connecting positive to positive and negative to negative terminals on the batteries. Try starting engine with good battery and connect second one only with jump leads and watch ammeter if you have one. If you have voltmeter check standing volts on each battery then check volts on good battery with engine running - should be 13 to 14v from charging circuit. Then connect second battery and see if volts remain. If second battery is short circuiting internally it is time to send it off for proper disposal.
2007-06-25 22:37:59 · answer #3 · answered by oldhombre 6 · 3⤊ 0⤋
With the losses inherent in the motor and the alternator, the battery will gradually go flat. Actually a motor itself puts some power back into the circuit, it uses a lot to start but them the amount of current drops considerable as it runs. I'm not sure what your question has to do with cars and transportation though.
2016-05-20 23:01:01 · answer #4 · answered by ? 3 · 0⤊ 0⤋
You have a bad battery or your connections isnt tight when combining them.
2007-06-25 23:34:26 · answer #5 · answered by redacatfish 2 · 1⤊ 0⤋
internal short in the additional battery you added
2007-06-26 06:54:20 · answer #6 · answered by Nick F 6 · 1⤊ 0⤋
SOLENOID ON STARTER ,DOING ITS JOB WILL NOT ALLOW OVERLOAD.12 VOLT SYSTEM WILL NOT CARRY 24 VOLT CURRENT THRU RELAY.
2007-06-25 21:27:46 · answer #7 · answered by MIKE S 3 · 0⤊ 1⤋