Question about Xantrex Technology Heart Freedom 20 12 Inverter

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Inverter won't charge

Hi everyone.I have a Xantrex freedom 20 inverter charger.My problem is that the inverter works but it won't charge my batteries.The batteries read 12.5 volts so low batteries must not be the prob.Any help would be great!!! Kelly

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  • Anonymous May 06, 2009

    My charger will not work either. Inverter works fine. Charger will not start when shore power is hooked up. I tried to disconnect it to reboot it but same problem exists. HELP!

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The problem is the batteries. 1) Check the age of them to assure they are not near warranty limit. If so change them. 2) They must be topped off. I recommend using distilled water within every 30-60 days. Summary: After doing item 2 above charge them with an external charger; while connected to inverter is ok. Does this help?

Posted on May 21, 2010

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Check if the inverter has a fuse for the charger, if it does test it if it is still ok if not change it

Posted on Feb 27, 2010

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Posted on Jan 02, 2017

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1 Answer

How do you verify that the unit is charging the batteries? Freedom 20 Inverter charger


The really only way one can tell if batteries are being charged is assure them are topped off then trickle charge them with external charger overnight and then check the voltage is 13-14.5 VDC. If not check that battery life is not expired and exchange them if it is. ALSO... one can always extend the life of batteries (deep-cycle) by charging them with a large professional automotive unit in the high power START position over night. WARNING: Assure the caps are loose as you "boil away" the plate corrosion over night due to the very explosive H2 gas generated. No smoking!!

May 15, 2010 | Xantrex Technology Heart Freedom 20 12...

1 Answer

Xantrex 458 freedom....has stopped charging house batteries off of engine alternator. Alternator is showing that it works (dash gauge). It does charge while on shore power or generator....but not charging...


Fis\rst of all is the inverter supplying 120 VAC? when turned on?. If so the inverter seems to be working.I think your problem is in the truck alternator/charging system. The inverter is independent of this charger..

Mar 23, 2010 | Xantrex Technology Xantrex 458 10 12...

1 Answer

Where can I find parts for my Freedom 20 Inverter/Charger near Virginia Beach, VA? The cooling fan is inoperative.


Contact Tekris Power Electronics
They are in NJ. Ph 732 938 4996

They know the Freedom units very well, I send all of my dead ones there. Good luck

Sep 11, 2009 | Xantrex Technology Heart Freedom 20 12...

1 Answer

Heart inverter had over temp led on


the temp control sensor is optional. If not connected the charger will charge at its default charge. No problem

Jul 20, 2009 | Xantrex Technology Heart Freedom 20 12...

1 Answer

Xantrex Freedom 458 Combi inverter/charger 2000 watt


OK my 2000 Discovery does the same thing. Try and hit the inverter charger with your fist 3-4 times, then listen and see if the charger fan starts up. I will be bringing my inverter to Portland this week to have the tech look at it. The other thing is it could be the transfer switch. Will let you know.

Jan 15, 2009 | Xantrex Technology Heart Freedom 20 12...

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