Old Bastard !
Joined: Fri Dec 22nd, 2017
Name: Grev B
Occupation: Quality Assurance Engineer
Interests: Rangers, Photography, Metal Bending
Reputation Points: 3073
lol, i'm probably making this more complicated than it needs to be.
basically i want to switch on a relay whenever the expo is running but not when the key is on or not running. this will control my battery isolator solenoid (basically a huge 500a relay, but it draws 8a so i want to use a smaller relay to trigger the solenoid)
this will charge both batteries when running & the alternator is charging, but keep the batteries separated when off or if i want to listen to the stereo with the vehicle off.
the voltage controlled relays i got should do what i'm trying to do.
if i set the turn on voltage at around 13.5v it should kick on the isolator when the alternator chaarges the battery & by setting the turn off voltage at around 12.8v it should turn off a few seconds after it's shut off & the battery returns to resting voltage.
i'll probably have to play with the on/off adjustments until i get everything dialed in.
as a bonus, i found the voltage sensing relay modules have a "force on" connection where i can install a switch somewhere in the cabin should the main battery ever go down & not start, i can connect the aux battery for a quick boost.
I understand... thanks !
I know you like to build stuff yourself, I do too to a degree, but why not get a standard Battery Isolation setup ?
Won't the standard Isolation Setup do what you want ?
Also, since an alternator only charges when the battery(s) need charging, will that interfere with the Voltage sensing relay or will the alternator actuate and start putting out a voltage because of the Relay Draw ?
Smell the smoke AGAIN !
2003 EDGE, Std Cab, Steppie, E4 Red, 5sp, 4x
5" SuperLift, 33" x 12.50 x 15"
Mod'd Backrack to fit Steppie
Front and Rear Bumpers by Custom 4x4 Fabrication, OK; now Mike's Welding and Fabrication.
Working on more Mods, just need more time, longer days would work !