cyrex battery combiner

looking at this product, Cyrix-Li-ct 12/24-120 (12V)
i have identical AGMs
combines the batteries if one is 13.4V or higher, this works both ways ?
i could have the alternator on one side and solar on the other side ?
Yes and yes but it's intended for connecting a lead acid battery to a LiFePO4 battery .
If both are agms wouldn't the ordinary Cyrix ct be more appropriate
 
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