Thursday, Feb 21, 2013 at 09:48
Sorry Allan..... thought speaking to you you would understand, I'll explain it a bit better.
"ING" and "LV" are nearly the same....
The BCDC1220 can come in two versions, the standard voltage sensing type and the ignition sensing type.... standard for normal older charging systems and ignition for the newer ECU controlled charging systems.
The BCDC 1225/40 come in standard for normal older charging systems and LV for the newer ECU controlled charging systems..... the difference between the 1220 ING and the 1225/40 LV is the blue wire on the 1225/40 has a dual function of switching it on and off as
well as controlling a relay to switch between alternator charging and solar.
So the ones for newer ECU controlled charging systems with a solar MPPT regulator are called LV (1225/40) and the one with no solar MPPT regulator are called ING (1220).
Both LV and ING require switched 12v+ to the blue wire to work..... the standard ones uses voltage sensing to turn on..... with the standard one you still have to connect the blue wire to a 12v+ source but it doesn't have to be switched..... in a standard install when using the standard version we connect the blue voltage sensing wire to the input wire.
The turn off and on voltage on the "LV" and "ING" models is the voltage the BCDC will turn off and on at when the unit is switched on from an ignition source...... The "standard" BCDC will auto turn off and on once a set voltage is achieved.
The low voltage cut out is a safety device.
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