(2) 12V batteries in parallel too much??

I was wondering though what damage would it do to have 2 12 volt batteries hooked up in parallel, just like you would if you were jumping it with another battery?? The battery box seems to be big enough, but just don't know if there would be any adverse affects of leaving it this way.

Matter of fact I looked at another FMD the other day hooked up in this manner, but nobody was around to talk to about the tractor.

As always, looking forward to the replies.
Thanks Robert

There’s a lot wrong with it. It creates a potentially dangerous condition, and you can have a runaway. (V2-V1)/R= I and (I*2)(R)= P

In real life two batteries are never at the same potential. So there is current flow between the two until on of the batteries is discharged enough for the voltages to equalize. If one of the batteries has a weak or shorted cell, there can be enough current generated between the two batteries to make one of them explode.

I read the web site referenced here and I just don’t agree that it should be done.

That’s why when you jump a car, they advise you not to connect the two batteries in parallel but rather, have one of the ground connections go to the chassis instead. This adds a small resistance and acts as a current limiter if the needs arise.

But this is a forum and we are supposed to discuss and get different views.

Tony

This won’t occur when it is running with the alternator generating power, but rather when the system is at rest in a quiescent state.

Regards

CalG

This link speaks to some of the features of both types of connections. My reading is that it is a wash between them.

Regards

CalG

If you want more capacity (amp/hours) you need to put two six volt batteries in series. If you need more power to spin the starter make sure you buy one with a very low internal resistance. i.e. a lot of cold cranking amps.)

The E27n Major starts on the third or fouth pull even after sitting for several months. If I try to use the self starter, the engine motors over faster than the magneto impulse coupling can work it's magic. Then the spark goes out.

Progress!

Regards

CalG

It's like pouring water from two buckets. But make sure your cables and connections are first rate else you will bring on other problems. Heating at terminals etc.

Use of "good" batteries is always a smart choice unless you are trying to make problems for yourself. ;-)

CalG

There will be no damage, and, in fact, having enough power to get the thing cranked over and started will be EASIER on the starter than a weak battery.

When you put 2 12 Volts in parallel, the amp-hour rating is doubled, so it's TWICE the amp-hour rating of ONE of the batteries.

Two 6 p.s.i. (volt) batteries in series, boosts the second 6 to 12, ...but the gallons is the same. It's just at higher pressure.

Two 12 psi (volt) batteries in parallel still only put out 12 but they put out twice the gallons. (The fire is gonna be put out fast!...as long as it's not too far away.)

You really wanna do some work? Put two high-amperage batteries in parallel....and you get lots of gallons at high flow rates (pressure) and can do lots of work. (That's why pressure washer that have lots of g.p.m. do better than those that don't ...regardless of the pressure.)

Hope this helps put it in perspective.

A word of warning: Use of batteries in parallel requires they be evenly matched as to size, relative age, and capacity (amperage). (A new, good battery will discharge into an old, shorted one with disastrous results. Makes a helluva fire!)