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Mobile power systems are only as good as the batteries that hold the power.
RVs typically use deep cycle, valve-regulated lead-acid (VRLA) batteries that can be regularly discharged and recharged. There are two types of VRLA batteriesā gel and absorbed glass mat (AGM)āwith the latter being more popular.
AGM batteries offer many advantages to the RVer. They are sealed, do not spill or vent gas, and require no maintenance. AGM batteries also charge quickly and are more resistant to low temperatures. They are, however, sensitive to overcharging and require the use of a charge controller as a preventative measure.
Gel batteries are also sealed and donāt spill, but they are much slower to charge than their AGM counterparts. Based on older technology, they also require a charge controller compatible with Gel batteries.
Lithium batteries. The third option not mentioned above is lithium batteries. They provide high performance and efficient charging in a low-weight package. They are safe, require no maintenance, and offer a long life-cycle. The drawback to lithium batteries is costāthese batteries come with a high price tag.
How many batteries will I need? This will depend on the energy consumption of your RV. The more appliances you plan to run, the higher your consumption will be. RV batteries can also be wired together to form a ābattery bank,ā providing either higher voltage (wired in series) or greater capacity (connected in parallel).
Should I choose 6v or 12v batteries? While 6v batteries offer more amp hours, 12v batteries, in some configurations, can provide more redundancy.
Most of your RV applications require 12v current, so youāll need two 6v batteries connected in series to generate those 12 volts. If one of those 6v batteries go bad, youāll have no usable power.
However, if two 12v batteries are connected and one does not work, youāll still have usable 12v power.
Typically, 6v batteries are used if youāre looking for maximum power or are planning to have a large battery bank.
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Get ready for the ultimate overlanding experience at the Overland Expo West in Flagstaff May...
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