Re: [mowbot] worried about power.

Monta Elkins (Monta nospam at
Wed, 25 Sep 1996 08:40:04 -0400

robin nospam at wrote:
> Monta Elkins <Monta nospam at> wrote:
> > Large "Motorcycle" batteries are 28 Amp Hour
> > (looked at them yesterday)
> >
> > Let's devote 20AH to 1 hour of cutting
> > (that's about 50% of the stall power figures from my chart)
> > and 8AH to 1 hour of movement(?)...
> Gag, splutter. 20Ah means 20A for 1 hour. There is no way I'm having
> something consuming 20A loose in my garden! Similarly, a two 4A motors
> are going to do serious damage if pointed in the wrong direction.
> I think you can reduce the figures to 1A for each motor and a generous 2A
> for cutting. 4A is still higher than I'd like, but a bit more reasonable!

I really don't have a feeling for power consumption here.
I was just basing it on ~50% of the power listed on the
commercial trimmers (4 amps nospam at 120 Volts = 480Watts).
.5 * (480W/12V) = 20 amps.

Hope I'm way off base here.
Can anybody measure actual power consumption of an electric
string trimmer. I've got a trimmer but no ammeter (smoked
it a few year ago, boy the electric company can put out
the amps :0 ).

-Monta Elkins

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