There is a growing trend in the Recreational Vehicle (RV) market (ie caravans, motorhomes, campervans and camper trailers) to replace the traditional lead-acid batteries with new lithium batteries (Lithium Ion Phosphate – LiFePO4).
There are several reasons for this:
- Weight Reduction – with the relevant state police forces cracking down on overweight camper trailers, many owners are now looking to strip out weight from their RV vehicles so they are within the legal weight limits by replacing their lead-acid batteries with LiFePO4 lithium RV batteries which are about 25% of the weight and volume of traditional lead-acid batteries, and about 70% of the weight of AGM batteries. This means that by swapping out lead-acid for lithium batteries, the battery capacity can be greatly increased while reducing (or at most equaling) the current volumetric space. These days with ever increasing number of electronic devices installed in modern RVs, this increase in battery capacity is very much needed.
- High Efficiency – LiFePO4 lithium batteries are generally >95% efficient whereas lead-acid or AGM batteries range between 80% to 85% efficiency.
- Depth of Discharge (DOD) – LiFePO4 lithium batteries are typically discharged to 80% – 90% on a daily basis and up to 100% in a backup situation without causing any damage, however lead-acid batteries can only be discharged up to 40% on a daily basis and maximum of 70% in a backup situation.
- Lifespan – LiFePO4 lithium batteries have a 5 year or >3000 cycle warranty when used in RV applications with CANbus communications, however lead-acid and AGM batteries typically have a 2-3 year and 500 – 600 cycle warranty.
- No dangerous gases – LiFePO4 lithium batteries are sealed units and give off no toxic gases and hence can be installed within the RVs, whereas traditional lead-acid batteries give off gases while charging requiring adequate ventilation and hence restrictions of where they can be located.
Dyness batteries currently offer 48V 50Ah LiFePO4 modules which can be paralleled to increase capacity as much as required with the first module serving as the master battery controlling all the others.
Dyness are also developing a 12V 175Ah LiFePO4 version, which will be available to the Australian market by the third quarter of 2020.
Dyness B4850 battery modules can be installed inside an RV within a weatherproof and dust proof environment, or they can be attached to the outside of an RV in two outdoor rated enclosures, the Powerbox which can fit up to 4 modules (with a max capacity of 9.6 kWh), or the Powercube which can fit up to 7 modules (with a max capacity of 16.8 kWh).