Re: Battery

Posted by Owen_Dyneto On 2019/9/13 17:58:43

There should be no need for a battery charger or tender in normal use, so either you've got a parasitic drain somewhere, or just need to adjust your 3rd brush for a little higher charging rate. Just for comparison, for daylight driving I have my '34 Eight charging rate set to give about 5 amps at road speed, the battery (NAPA Commercial lead/acid) never needs external charging and is always at full charge; I'm not using lights, heater or radio. If you make more very short trips with lots of restarts or your car is not a quick starter, you will need a bit higher rate. Mine is a very fast starter, engine rarely makes 1 full revolution before starting. So, once you determine that you don't have some drain somewhere, why not adjust your generator to give about 10 amps at road speed and see how that goes?

We could use a bit more information. Are you using a battery disconnect switch when the car sits for those 7-10 days? Is your driving with or without lights, radio, heater? Have you checked to make sure you don't have a battery drain?

With your low charging rate, you might need 8-12 miles of driving to recharge for a single start, perhaps even more.