I'm assuming the 100a rating is peak and that operating we should stay 20%
down, so 80a. I don't know what the heater fan draws but I'm going to guess
5-6a, then the internal lights, heater mirrors (you need heated mirrors, the
tracks throw snow onto the mirrors) etc...Fortunately this is a 1989 machine so
its a fully mechanical engine, no electricity other than the starter. Its got a
semi-truck style battery so lots of starting capacity.
We got a grant this year to do a big rebuild on it so we're trying to be as
complete as possible.
-Curt
On Saturday, April 13, 2019, 8:17:37 AM EDT, Mitch Haley via Mercedes
<mercedes@okiebenz.com> wrote:
> On April 12, 2019 at 10:10 PM Curt Raymond via Mercedes
> <mercedes@okiebenz.com> wrote:
> The machine is powered by a Cummins 6BT and currently has a 105amp
> alternator. Those big light bars are rated at 24a each (!) which I think is
> bonkers.
So, what's the problem?
My 1977 Saab has K-Jetronic injection, a high pressure high volume fuel pump
that probably draws 10A, four 60-65W high beams and a 55A alternator.
If the snow cat sends 50A to the aux lights, that leaves 55A for everything
else.
And I assume the snow cat rarely runs for less than an hour, so it has plenty
of time to fully charge the batteries.
Mitch.
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