We are selecting a charger for a small cabin sailer. It has a 72Ah battery. We have some difficulty to decide on the best model:
Blue Smart IP65 7A
Blue Smart IP65 10A
Blue Smart IP67 7A
Blue Smart IP67 13A
Note that between the last two, the 7A might be a bit on the small side (7A < 10% * 72Ah), but 13A might be overkill?