RV FEATURE
A WORD ABOUT BATTERY TYPES
If you order a new RV today , it is likely that you will be given the choice between fitting AGM or lithium batteries . While it is theoretically possible to completely drain either type of battery to 0 per cent SOC , it ’ s not something you want to do every day .
As a rule , you want to avoid discharging AGM batteries below 40 per cent SOC and lithium batteries below 10 per cent SOC . This varies with the quality of the battery and , in the case of lithium batteries , they have an internal management system that will isolate the battery at around 10 per cent SOC before it is fully depleted .
Usage summary
Low to moderate 12V power requirements , three-way fridge , no inverter , 150 to 300W solar capacity
Moderate 12V power requirements , medium-sized compressor fridge , low inverter use , 400 to 600W solar capacity
High 12V power requirements , large compressor fridge , moderate inverter use , 500 to 1000W solar capacity
High 12V power requirements , large compressor fridge and small car fridge / freezer , high inverter use , over 1000W solar capacity
RECOMMENDATIONS
Trying to come up with recommendations that would suit everyone is difficult as we all have different power requirements . That said , I believe we can provide a general indication of the minimum capacity battery you will need based on approximate power requirements .
Recommended AGM battery capacity range
Recommended lithium battery capacity range
100 to 150Ah 75 to 100Ah
200 to 300Ah 100 to 200Ah
AGM batteries not recommended
AGM batteries not recommended
300 to 500Ah
600Ah or more
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