Best method for maintaining engine batteries.

Kayteg1 wrote:
Can't say about all the systems you quoted, but battery combiner in normal "on" position does exactly what piece of wire connecting 2 battery banks do.
Don't know what is so great about it, when you can have the same job done by 50 cents worth of wire.
We want to assume that electronic circuit in Trik-L-Start will give the starting battery some protection in case of converter overcharging, but the selling brochure gives no details about it.

This isn't a battery combiner. It is a trickle charger. It does not do what a "piece of wire" does:

LSLProducts wrote:
• Built-in blocking diode keeps starting
battery fully charged, even if house
batteries are completely discharged

See, no combining.

As far as converter failure:

LSLProducts wrote:
• Fully protected against
overcurrent, short circuits

Although, it is not the trickle charger's job to protect from a bad converter. What protects the house batteries from a bad converter? That is what protects the chassis battery from a bad converter.

You seem fixated on "bad converters." This thread is not about bad converters. That is the subject for a different thread entirely. Saying this product is not good because it fails to protect against a bad converter makes no more sense than saying it is a bad product because it does not protect from low tire pressure. Both are outside its scope or design.