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Posted: Wed Dec 02, 2009 10:28pm

Post Subject: Mastervolt heart interface freedom 25

Hi, I have got a Mastervolt freedom 25 inverter/charger but no wiring diagram for it, its got mains input and 'transfer' wires and dont know what to do with them. Its not new and i have tested the inverter side (12v to 230v ac) and it works fine, just not sure about the input wiring. Also, can this be used to split charge both battery banks and will this affect its use as an inverter? Thanks for any help,,,Tony.


Posted: Thu Dec 03, 2009 9:53am

Post Subject: Mastervolt heart interface freedom 25

Dear Tony, as this is a mains device I must advise that you consult a properly qualified marine electrician with experience of such things or go back to your supplier. It seems that Mastervolt have disappeared but I think I have traced the current brand owners to Xantrex Technology and although they do not now mention a 230 volt unit with 25 in the designation I suspect you will find what you need on this site: t1.asp (all on one line). Remember the size of any 12 volt cable is exceptionally important, too big - no problem. Too small - lots of problems so look at all the technical and installation files on the above site. Tony Brooks

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