Thread: Traxide dual battery system

Hi Paul and the BG-25 is shipped set at 11.6v, but the user can select between 4 different cut-out voltage settings using the two dip switches inside the BG-25.

The settings are 11.6v, 11.8v, 12.0v and 12.3v

The BG-25 has an LED that shows when the unit is on and the battery power level is still reasonable.

The LED constantly fads brighter and duller to warn the user that the battery voltage level is getting near the cut-out point.

And the LED gives short flashes once it has cut-out.

The cut-in voltage is 12.5v. This level stops oscillation but allows the unit to cut-in even if there is a heavy load elsewhere in the system that might be causing a voltage drop after the motor is started. Like low house batteries in a camper trailer or caravan.

The BG-25 has a 30 second delayed shutdown to over come load spikes caused when things like fridge motors start up.

The units come wired with an in-line fuse holder and fuse, so the installation is pretty simple and straightforward.

The BG-25 measures 50mm x 50mm x 20mm

Does anyone with a Bushman fridge know if it has an automatic cutoff? I have read the instructions and it doesn't mention it.

Originally Posted by drivesafe

.... So to save people from damaging their auxiliary batteries, the kits now come with the BG-25.

Drivesafe, you mentioned in another thread the USI-160 controller has a low voltage cut-out setting.

Does the low voltage cut out on the USI-160 controller serve the same purpose as the BG-25 low voltage cut out switch?

Originally Posted by Ferret

Drivesafe, you mentioned in another thread the USI-160 controller has a low voltage cut-out setting.

Does the low voltage cut out on the USI-160 controller serve the same purpose as the BG-25 low voltage cut out switch?

X2, I have a USI 160 and was wondering this as well.

Hi Ferret and Andrew, both the SC80 and the USI-160 have a cut-out voltage of 12.0v NOT 11.6v.

The cut-out voltage of the SC80 and USI-160 is specifically designed to protect the cranking battery while the BG-25 cut-out voltage levels are designed to protect the auxiliary battery(s) after the cranking battery has already been isolated.

A word of caution, the cut-out settings on fridges are there to protect the fridge motor voltages from getting down to a point where the motor will stall, they are not designed to and will not protect your auxiliary battery from being over discharged.

So with the USI 160 the cranking battery will be isolated and protected at 12 v. But can still run the aux battery flat and the fridge cut out wont protect it?

Can the BG 25 be retrofitted to a USI 160 system?

Hi Andrew and the BG-25 can be fitted to any system.

They will be $75 when I get some extras ready and post them up on my site.

They are being added to the kits for $50 and will be available to anyone with one of my kits for the same price.

Hi Tim,

Originally Posted by drivesafe

A word of caution, the cut-out settings on fridges are there to protect the fridge motor voltages from getting down to a point where the motor will stall, they are not designed to and will not protect your auxiliary battery from being over discharged.

My ARB 47 ltr fridge has multiple cutoff voltages selectable depending on how low you wish to allow your aux batt to discharge, the lowest being 10.5 v.

So It would appear the ARB voltage cutoff is for the batt not the fridge?

Also can you explain how your sc80 almost doubles the Ah of the aux batt?

I am used to a 100Ah aux batt in my D2 and the 55Ah that came fitted in my recent D3 purchase is a wee bit under powered for my uses.

Cheers

Al