20 hp Yanmar w/ 60 amp alternator. 125 amp hr lithium house battery What is the minimum size AGM starting battery required in a two battery system. Is 20 amp hr too small ?
asked
Minimum starting battery size with Smart 12/12 -30A charger and lithium battery in sailboat.
Hi @Don Hudak,
for 20hp Yanmar anything between 40 and 70A will do the job. 20Ah is a bit too small in my opinion because of the voltage drop at start.
