It's the bailey box for me plus the zig unit, most caravan manufactures can,t be wrong it is a proven system
Hello John How's the new project?
There is no arguing with you that the Zig is an eminently popular unit.
Without looking it up I can't remember the precise figures but the Zig has a maximum charging voltage of less than 13.8V. It is argued that both for speed of charging and desulphurisation higher voltages should be used.
I had some notes on this and was going to try asking some neutral parties about using intelligent chargers in situ as some of the stuff for sale seem to make the sort of claims that would have been suitable for selling snake oil.
You really get to issues with 13.8V or less if there is any distance between the unit and the battery the additional losses through the cable make things quite poor.
Not remembering enough facts at this point to quote but try Googling "Ideal Charging Voltages For 12V Batteries" or "XXXXX Battery Charging Cycles" XXXX being the type of battery you are using e.g. calcium batteries. You will find that calcium batteries are supposed to get a higher charging voltage than conventional lead acid. (Yes I know calcium is still lead acid)
Of course if your like me and haven't connected one of M/C batteries to a charger for 6 months. Well that is most probably ragged so as always it's kit and care in use.
If you get a Zig unit for the right price then as I said about the Lab Craft stuff great. I'd certainly not pay top dollar for a device that is no better than a dumb charger and a voltmeter.