The ring and the Sterling do need ventilation but the CTEK does not.Hi jacking, sorry. Would every B2B unit need to be in a ventilated location ? I was hoping to shove it in the locker with the batteries with all the other electrickery gubbin's. Out of sight,out of mind.
Both the Ring and CTEK have an MPPT solar charger built-in, the Ring is 30A and can accept voltage inputs up to 50 volts, so it can be used with a wider range of panels. The CTEK is simple as it is fully automatic. The Ring requires setting up but this makes it better non-standard batteries where charging characteristics need to be altered.