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12V Guru – add a second caravan battery

12V Guru – add a second caravan battery

Concern up to a 12V Guru

Possibly one item that the guru may prefer to address is the addition of a caravan that is second to a preexisting caravan 12V system that presently has only one home battery. Just exactly What shall we think about whenever assessing the capacity to accept the extra battery pack, selecting the new battery, plus the fitting and wiring? For reference caravan, may a Jayco is suggested by me Silverline?

All the best, Bob Murray

12V Guru answers

Many thanks for the concern. Numerous RVers find one battery is not adequate to service their requirements, specially on a van such as for example a Silverline where there are numerous appliances.

Join the batteries in parallel

To possess a two battery pack set-up, it is important to join the batteries in ‘parallel’ where in fact the terminals that are positive connected together basically utilizing the negative. Utilize dense cable such as 8.4mm2 (AWG 8) and quality battery pack lugs. a configuration that is parallel the capability of one’s system in Amps and keeps the nominal voltage at 12V DC, that will be exactly what your van needs. Therefore, two 12V 100Ah batteries joined up with in this manner offers you 200Ah ability at 12V.

Maximise the worthiness of a system that is large

To increase the worthiness whenever establishing a bigger system, make certain you have actually two batteries of this exact same chemistry, age and then make. Various battery pack chemistries such as for instance AGM, gel, calcium have different charging voltage needs and also you could not obtain the two batteries precisely charged to do something as you. Likewise, a cycle that is deep in parallel having a beginner (cranking) battery pack are affected as you will find construction distinctions internally during these batteries.

Batteries obviously degrade as time passes and their ability decreases, so an adult battery pack having a brand new one will likely not provide maximum performance. Aligning these facets will let the battery pack to use as you large bank along with cells within the exact same condition.

Failing that, an unbalanced battery pack bank may cause the batteries or their interior cells never to get a much number of the present as a result of the various interior resistance, which leads to various areas of the battery pack bank receiving various amounts of present. For instance, a bank composed of a three-year-old battery degraded with age and brand new a battery won’t cost evenly across the different phases of recharging. And so the state of fee (SOC) will change regardless of if the battery that is new exactly the same brand name and chemistry.

So simply speaking, to update your battery system up to a higher capacity that is amp would be most readily useful to purchase two to three brand new batteries of the identical brand name and chemistry, make use of the more substantial quality cable, fuse accordingly and make certain your charger is with the capacity of fulfilling your needs. To make certain your brand-new battery pack bank will be with the capacity of being completely charged look at a DC-DC charger or the addition of the setup that is solar.

Lithium setup option

Needless to say, often there is the choice of upgrading one’s body towards the latest Lithium setup Jayco has just released, which may signify with just one battery pack you can have twice as much Amp capacity, longer life, fewer than half the extra weight and a smaller asking time—but it comes down at a price!