On 14/12/2016 16:14, Rod Speed wrote:

It isnt a car, it’s a piece of farm machinery that doesn’t get used a
lot.

Yes you said. It doesn't really matter.

Corse it does.
No it doesn't. I have a car that doesn't get used a lot. I have a willy
that doesn't get used a lot and when I do want to use it it often won't
start.


If it was designed to start on one battery that should be all it needs.

And if it never was designed to start on one battery, it wouldn't be.

Agreed, but very few things have two batteries. Usually they have one,
sized appropriately. There are as we have discussed possible problems
with two smaller batteries.


If one battery won't produce enough current to turn the engine over
fast enough

You don’t know that is the problem.
He said he was having trouble starting it. If the machine was turning
over qiuickly but not starting he wouldn't suspect the battery.


then there's something wrong.

Not if was always designed to need two batterys in parallel to start it.
Agreed but that's very unusual as I said. I was assuming the OP would
have the intelligence to discount my remark if it was the case.


The battery, the cables, the starter, or the engine.

You don’t know that there is any fault at all.
I do, the guy said it wouldn't start. Therefore there's a fault. Things
are supposed to start. Shall I tell you about my willy again?


If it doesn't run for long enough to recharge the battery after starting

That does appear to be the problem.

then yes, you'll need some auxiliary charging. The little solar
chargers aren't much use. The bigger ones are better. Unless the
vehicle is in a barn!

In which case it should be possible to plug it in in
the barn to allow it to be charged when in there.
Not all barns have an electric supply. Barns that are detached from
habitation or remote from it usually don't. Why did you say that anyway?
You're just sniping without a target. Got out of bed the wrong side?

Bill