What is the best type of battery for an RV electrical system ?

Know about the power consumption of the RV, you can more clearly choose the type and capacity of the battery.

Judging from the configuration of more than 100 RVs we have contacted, there are now basically very few lead-acid batteries available. Lead-acid batteries are heavy, bulky, and wear fast; while lithium iron phosphate(LiFePO4) batteries have the advantages of high safety factor, small size, and high cycle times (generally greater more than 2000 times, long life), etc., that are chosen by more and more users. The density of the ternary lithium(LiMn2O4) battery is higher than that of lithium iron phosphate, so it has the advantages of lighter weight and smaller volume than lithium iron phosphate, but also very obvious weaknesses. The safety performance is not as good as that of lithium iron phosphate, and the number of cycles is 600.  The price is higher than lithium iron phosphate.

What I have to mention here is that there is a key parameter that will be ignored by all RV riders, that is the charge and discharge coefficient of lithium batteries, usually expressed as ?C. We take the 12.8V/460AH battery as an example. If the marked discharge coefficient is 1C, which means it can withstand a maximum discharge capacity of 460A. The battery can withstand 1 hour to discharge the battery, and it does not damage the battery life. If it is marked as 0.5C, it means that it can only withstand a maximum of 2 hours to discharge the battery without harming the battery; some even only have 0.2C. If the battery cell is only 0.2C, then even if your BMS or protection board can withstand charging and discharging more than this current, it will cause damage to the battery.

The same is true for charging. Lithium iron phosphate batteries on the regular market now generally have a discharge coefficient of 1C and a charge coefficient of 0.5C; that is, it can support 1 hour to discharge, and 2 hours to fully charge. This will be an important reference parameter when choosing a lithium iron phosphate battery, of course, this statement also applies to ternary lithium batteries.
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