The engine battery of a motorhome starts the engine and powers the cab: a completely different job from the service battery. Here you will find NAIONICS EverStart sodium batteries at 12V, 50Ah with 800A CCA and 100Ah with 1300A CCA, with Bluetooth.
The criterion is cold cranking in CCA and the lead-acid equivalence: a 50Ah sodium unit rated 800A CCA covers a lead battery of around 1000A CCA, which suits most van diesel engines. Check external dimensions and polarity, because the engine bay leaves no margin.
Unlike lead-acid, sodium chemistry does not sulphate during months of winter storage and keeps its cranking power at low temperature, exactly when a motorhome is used less and restarted cold.
