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12V Guru – add a caravan battery that is second

12V Guru – add a caravan battery that is second

Question to a 12V Guru

Possibly one item that your particular 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 house battery. Exactly What shall we give consideration to when evaluating the capacity to accept the additional battery, selecting the brand new battery pack, 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 your concern. Numerous RVers find one battery isn’t enough to service their needs, especially on a van such as for instance a Silverline where there are numerous devices.

Get in on the batteries in parallel

To possess a two battery pack set-up, you will have to join the batteries in ‘parallel’ in which the terminals that are positive linked together and likewise because of the negative. Utilize cable that is thick as 8.4mm2 (AWG 8) and quality battery pack lugs. a configuration that is parallel the capability of one’s system in Amps and maintains the nominal voltage at 12V DC, that is exactly what your van needs. Therefore, two 12V batteries that are 100Ah this way offers you 200Ah capability at 12V.

Maximise the worthiness of a big system

To maximise the worthiness when installing a bigger system, make sure you have two batteries of this chemistry that is same age and then make. Various battery chemistries such as for instance AGM, gel, calcium have different charging voltage requirements and you also would not obtain the two batteries correctly charged to behave as you. Likewise, a cycle that is deep in parallel with a starter (cranking) battery pack are affected as you will find construction differences internally during these batteries.

Batteries naturally degrade with time and their ability decreases, so a mature battery pack with a brand new one will perhaps not offer maximum performance. Aligning these factors will let the battery to use as you big bank along with cells within the exact same condition.

Failing that, a battery that is unbalanced may cause the batteries or their interior cells not to ever get a straight quantity of the present as a result of different internal opposition, which leads to various areas of the battery pack bank receiving different degrees of present. As an example, a bank composed of a three-year-old battery degraded with age and brand new a battery won’t fee evenly over the different phases of recharging. And so the state of fee (SOC) will be different even though the battery that is new exactly the same brand and chemistry.

Therefore simply speaking, to update your battery pack system up to a higher Amp capability it would be most readily useful to purchase 2 to 3 brand new batteries of the identical brand name and chemistry, make use of the weightier quality cable, fuse accordingly and make certain your charger is with the capacity of fulfilling the needs you have. To make certain your brand-new battery pack bank will be with the capacity of being fully charged look at a DC-DC charger or even the addition of a setup that is solar.

Lithium setup choice

Needless to say, there’s always a choice of upgrading one’s body to your latest Lithium setup Jayco has simply released, which will imply that with just one battery pack you might have twice as much Amp capacity, longer life, fewer than half the extra weight and a shorter asking time—but it comes down at a price!