Originally Posted by
drivesafe
Hi David, if an SC80 is more than 2 years old, then you can add a switch into the green earth wire coming from the SC80 and then you can turn the SC80 off when you are not using your vehicle. This switch is only going to carry less than 0.3 amps, so a small switch is ideal.
With the older SC80, as austastar posted, if the LED is flashing, the SC80 is already off. But with the older SC80, if the batteries are in good nick and are fully charged when you last used your vehicle, the Older SC80s can remain on for a month or more.
With the new SC80s, because of changing driving habits and vehicle usage, the SC80 now automatically turns off 72 hours after the motor is turned off.
The SC80-BM ( only used in some of my Land Rover kits ), the DT90 and the USI-160, all have a switch on the In-Cab module ( which is supplied with these isolators ) that allows the owner to set these isolators to STORAGE mode, which effectively turns the isolator off shortly after the motor is turned off.
With the older SC80s and the switch in the earth wire, if you do not turn the switch on, the isolator remains off.
With the new isolators, if you intentionally or accidentally leave the switch on the In-Cab module, in the STORAGE mode, every time you run your motor, the isolator will turn on automatically, to charge the auxiliary battery, and the isolators will turn off when ever the motor is not running.