There is a cure for unequal discharge of batteries. In the bus industry we have had to deal with that for some time, with unequal loads on both batteries. There is a company that can help. Vanner systems sells a product that monitors both batteries, and distributes load and charge according to which battery needs what. Look for them on the internet, I am sure they are there.
hope this helps, Steve WD0EZS ---- Al Wolfe <[EMAIL PROTECTED]> wrote: > Ian, > A pair of big schotky(sp) diodes works very well for what you are trying > to do with very little voltage drop. Or just get a battery isolator at the > nearest RV place. But then I don't know how many RV places there are in > Biloela. > > The negative side of the batteries are tied together and the positives > terminals go to the anodes of the diodes, their cathodes being tied > together. The cathodes then feed the load. Which ever battery is charged the > highest will supply current to the load. A discharged battery is isolated > from the load automatically and can't affect or load down the charged > battery. No switching or other fancy electronics involved. It's all > automatic. > > As Bob, NO6B, mentioned, having the receiver on one battery and the > transmitter on another is the worst of the choices in that failure of either > system make you down. But, by using diode steering one battery system can be > completely flat or broken but you are still on the air. > > Al, K9SI > > > Re: Dual battery system > Posted by: "Richard Bessey" [EMAIL PROTECTED] richard_viviotech > Date: Fri Aug 1, 2008 11:14 am ((PDT)) > > Ian, > If you find such a circuit to do this, let me know as I am curious how > this would work. > > Regards, > > Richard Bessey > System Administrator > Vivio Technologies > Phone: 509-956-3050 Ext. 1005 > > > > Kerincom wrote: > > > > Hi guys .I am wondering if anyone knows of good pages on dual > > batteries systems and comments on which of following questions is better > > > > I am wondering if having two batteries .one for the receiver and one > > for the TX each with its own solar regulator or > > A system where two batteries are charged by two separate regulators > > and the TX and rx run off one battery and when extended no solar > > period happens the repeater is switched to the second battery when the > > main drains below 10 or 11v and returned to the main when it charges > > back up > > > > Thank You, > > Ian Wells, > > Kerinvale Comaudio, > > 361 Camboon Road.Biloela.4715 > > Phone 0749922574 or 0409159932 > > www.kerinvalecomaudio.com.au <http://www.kerinvalecomaudio.com.au/> > >
