andrew1 Posted October 30, 2011 Share Posted October 30, 2011 Has anyone fitted 2 battery's and use a switch to alternate between the two battery's ? Link to comment Share on other sites More sharing options...
Didjeridave Posted October 30, 2011 Share Posted October 30, 2011 I'd be interested to hear why you wish to install an additional battery? It would be easy enough, but if the second battery were to be a distance away (boot etc), the cable & switch would need to be very heavy duty; the cable's not so much of an issue, but the switch might be pricey - the cranking current draw can be hundreds of amps. Link to comment Share on other sites More sharing options...
ryan.. Posted October 30, 2011 Share Posted October 30, 2011 Why do you want to fit a 2nd battery? Link to comment Share on other sites More sharing options...
andrew1 Posted October 30, 2011 Author Share Posted October 30, 2011 i have this spare new battery just lying around just thought i could run my amps on it and i have a 1000w inverter that i want to refit would prefer it all in the boot Link to comment Share on other sites More sharing options...
ryan.. Posted October 30, 2011 Share Posted October 30, 2011 you dont need to run it on a switch mate. The only reason imo to run a split charge system (which is what you would want) is if you spend a lot of time with the stereo on and the engine off. Firstly, the battery needs to be a sealed battery. You cannot use a normal lead acid battery as they vent fumes. You dont want that in the car. Look into sealed AGM batteries. To wired it up run a run of 0awg from the + on the front battery to the rear battery. Within 6" of EACH battery you need an inline fuse holder with fuse so thats 2 fuses on that cable in total. Earth wise you need to run 0awg again from the battery to either the bootfloor OR a run of 0awg to the earth on the front battery. Link to comment Share on other sites More sharing options...
Didjeridave Posted October 30, 2011 Share Posted October 30, 2011 In that case, I would suggest you consider replacing the stock with a much higher capacity battery, then run cables to it from the original battery location. You could connect the two in parallel so that they both charge, but if you really want to switch between batteries, that will be trickier than it first seems. Knowing the cranking current draw would be useful, but I'd estimate 300A cabling would be sufficient. Link to comment Share on other sites More sharing options...
ryan.. Posted October 30, 2011 Share Posted October 30, 2011 you cant replace the oem one with a much higher capacity one. Afaik there is only one battery on the market which fits the oem location AND is of a decent ah rating. This is a battery made by XS Power and costs £300 Link to comment Share on other sites More sharing options...
andrew1 Posted October 30, 2011 Author Share Posted October 30, 2011 In that case, I would suggest you consider replacing the stock with a much higher capacity battery, then run cables to it from the original battery location. You could connect the two in parallel so that they both charge, but if you really want to switch between batteries, that will be trickier than it first seems. Knowing the cranking current draw would be useful, but I'd estimate 300A cabling would be sufficient.thanks if i don't fit a switch how do i run them then ? Link to comment Share on other sites More sharing options...
ryan.. Posted October 30, 2011 Share Posted October 30, 2011 exactly how i said Link to comment Share on other sites More sharing options...
Didjeridave Posted October 30, 2011 Share Posted October 30, 2011 Yup, as Ryan's method above! Positives to positives, negatives to negatives or the chassis (the latter will save you on cabling too).Ryan: my suggestion was to replace with a higher capacity one in the boot, not the bay. I suppose you could use standard lead acid batteries too if you constructed an enclosure, but you'd need to make sure it was properly bolted down & had ventilation to the exterior. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.