DIY - Installing a Second or Third Battery

Hey guys i just posted this in another thread but thought it was worth its own in the DIY section.

I didn't want it to get lost cause it looks like really good detail.

Excuse the fact that it is designed for a specific product as the wiring diagrams stand alone

I got all this info on the Traxide controller and some decent wiring diagrams below from this site.

http://www.traxide.com.au/trax1sc80_2.html

SC80 DUAL CIRCUIT AUXILIARY BATTERY CHARGER

Recommended price, Supply only $125 (AUST)
Price Includes GST
The SC80 is available in 12 volt ( and 24 volt on request ) The SC80's first and most important objective is to protect the vehicle's main battery against being discharged bellow a point at which the battery would not be able to start the vehicle.

SINGLE 80 AMP CIRCUIT. The SC80 has a PRIMARY and a SECONDARY circuit. These circuits can be joined together and operated as a single 80 amp auxiliary battery charger, connecting the main battery to 1 auxiliary battery.

DUAL 40 AMP CIRCUITS The SC80 can be used to charge 2 auxiliary batteries via separate 40 amp circuits, so if there is one auxiliary battery under the bonnet of a vehicle and another in a caravan being towed by the vehicle, the SC80 will charge both batteries while the voltage at the main battery is at a high enough level. After the vehicles motor is stopped, the power can be shared by all the batteries to extend the operating time of the auxiliary batteries. But once the voltage at the main battery drops to the cut out level, all the batteries will be isolated from each other.

NO ADDITIONAL RELAYS OR SOLENOIDS ARE NEEDED, TO INSTALL AND OPERATE THE SC80.


DUAL VOLTAGE CIRCUITS The SC80 can also be used to control circuits of different voltages. You may have a 24 volt vehicle with an SC80-24 fitted. The PRIMARY circuit could be wired between the main battery and a step down voltage converter and the secondary circuit could be wired between a 12 volt auxiliary battery and some accessories. When the voltage at the 24 volt battery drops to the cut out level, the SC80-24 will isolate the step down voltage converter from the 24 volt battery and isolate the accessories from the 12 volt auxiliary battery, thus protecting both batteries systems at the same time.


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If anyone else has good info on Battery systems then post below.

Battery Mounting options here too.

Great report. Noticed on the last diagram a mention of making sure the earth lead is as large as the positive. It is something a few people forget that the earth has to carry the same load.
Phil.

Can't believed I missed this....Great post MR, this is on my to do lists and your post will come in handy for sure!

Great post !