12V Guru – add a caravan battery that is second

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Concern up to a 12V Guru

Possibly one item that your particular guru may prefer to deal with is the addition of the second caravan battery pack to a preexisting caravan 12V system that presently has only one household battery pack. Just exactly What shall we think about whenever evaluating the ability to accept the extra battery pack, selecting the brand new battery pack, as well as the fitting and wiring? For guide caravan, may a Jayco is suggested by me Silverline?

All the best, Bob Murray

12V Guru answers

Many thanks for your question. Many RVers find one battery is not enough to service their needs, particularly for a van such as for instance a Silverline where there are lots of appliances.

Join the batteries in parallel

To possess a two battery pack set-up, you will have to join the batteries in ‘parallel’ where in actuality the terminals that are positive linked together and likewise vital link because of the negative. Utilize cable that is thick as 8.4mm2 (AWG 8) and quality battery lugs. a parallel setup increases the ability of the system in Amps and keeps the nominal voltage at 12V DC, that is exactly what your van requires. So, two 12V batteries that are 100Ah in this way offers you 200Ah capability at 12V.

Maximise the worthiness of the system that is large

To increase the worthiness whenever installing a more substantial system, make sure you have actually two batteries of this exact same chemistry, age and also make. Various battery pack chemistries such as for instance AGM, gel, calcium have different charging voltage needs and also you could not have the two batteries correctly charged to do something as one. Likewise, a deep period battery in synchronous having a beginner (cranking) battery pack are affected as you will find construction distinctions internally within these batteries.

Batteries obviously degrade with time and their capability decreases, so a mature battery pack with a brand new one will perhaps not offer performance that is optimum. Aligning these facets will let the battery pack to use as one big bank along with cells within the exact same condition.

Failing that, an unbalanced battery pack bank can cause the batteries or their internal cells to not ever receive a level number of the present as a result of various interior opposition, which leads to some other part of battery pack bank getting various quantities of present. For instance, a bank composed of a battery that is three-year-old with age and brand new a battery won’t cost evenly over the different phases of asking. Therefore the state of charge (SOC) will change just because the battery that is new similar brand name and chemistry.

So simply speaking, to upgrade your battery system up to a higher Amp capacity it might be best 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 guarantee your charger is effective at fulfilling your needs. To make sure your brand-new battery pack bank will be with the capacity of being completely charged look at a DC-DC charger or even the addition of the solar setup.

Lithium setup choice

Needless to say, there’s always the choice of updating your body into the latest Lithium setup Jayco has simply released, which will signify with only 1 battery you can have twice as much Amp capacity, longer life, not even half the extra weight and a smaller recharging time—but it comes at a price!

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