50 sounds like alot.
The best approach is to get that auto relay from schnitz that allows the aux battery to charge with the primary on the charging system. It only switches the voltage to 24v (series circuit) to the starter then auto magicaly switches things back to normal (parallel circuit) so that both batteries are being charged by the charging system.
I use a similar home made setup for LSR events and my voltage stays consistant for the entire weekend without a charger.
Since your runs are so short and doesn't give much time for a re-charge from the system. I would think eventualy both batteries would be down on voltage but probably after the 50 mark.
Quote:
Originally Posted by Professor  Do you know if it will do say 50-75 restarts before charging the secondary battery? I'd like to avoid recharging it at the track more than anything. |