"DSK" wrote ...

You should have a starting battery for starting your engine, unless it's a
very
small engine compared to your battery bank. The surge load of a starter,
and the
large momentary voltage drop, can kill a battery not designed for it. I
have a bit
of math for determining this, but a simpler rule of thumb is to crank the
engine
over while watching a volt meter (a digital mulitmeter set to record
minimum V works
best) and see if the voltage drops below 10.5V. If yes, you need either
more battery
or a dedicated starting battery.


Thanks Doug.

Are you measuring the voltage at the battery or the starter during this
test?

-rick-