Aquagen0 wrote:biggibbo wrote:Nope. The VSR sends power to the 2nd battery from the first battery once the first battery reaches a certain voltage under charge from the alternator (about 13..4) When the voltage drops below charging rate, the VSR cuts the link to the second battery to protect the starting battery from draining.
Accessories are wired to the secondary battery to protect the starting battery.
If you remove the second battery and wire accessories to the second battery output terminal on the VSR they will only get power when the alternator is sending charge. If wiring to the starter side of the VSR to get power all the time, you might as well wire direct to the main battery.
There should be power at the output side of the vsr while the start battery is above 12.8v ish. And there should be power at the output side of the vsr while the 2bd battery is plugged in as I'm assuming power flows in both directions. My aim is to have rear lights running off vsr for reversing, but also getting power from dual battery for camping.
Check what your VSR cut out is. Mine drops back at 12.8v like you say, which is about 2 mins after shutting down the motor. You might find if running light etc it will cut out pretty quickly. If you only want for reverse lights in theory should work as you want.