Originally Posted by
the evil twin
I do not like those Traxide units at all. 12.0 volts cut off is waaaay too low With engine off they drain the Cranker and keep all batteries at equal charge unless you drop down below 12.0 volts and both batteries are now sulphating quite heavily. That is totally the opposite to what I want in an Isolator. The lowest voltage I would call acceptable is 12.5 (most manuf use 12.7 as default) They say "One of the most common problems suffered by cranking batteries is under charging and this is usually caused by what we call the "Shopping Trolley Syndrome", where vehicles are continuously driven for short periods of time, each time the motor is started. Because of the unique way the SC80 keeps the cranking battery and the auxiliary battery connected after the motor is stopped, and the fact when driving around town, most auxiliary batteries are usually fully charged, with the SC80, this means when the motor is stopped, if the cranking battery is low, the SC80 allows the auxiliary battery to discharged back into the cranking battery, helping to raise the charge state of the cranking battery. How can the aux be at a different state of charge (IE fully charged) to the cranker if their system keeps them connected and equalises charge when stopped IE draws down the Aux. Indeed if you have a higher capacity Aux it will 'steal' some of the charge current available for the Cranker They also say "The next time you start your motor, you will be charging two batteries at the same time and as such, you are able to replace twice as much used battery capacity in the short drive time, so over just a few day after fitting an SC80, even your cranking battery will be in a better state of charge." I call Bullshit, total bullshit actually Anyway, If you need an increased capacity in the Redarc etc all you do is flick the switch If you want to crank off the Aux all you do is flick the switch