Question about Xantrex Technology DR2412 Inverter / Charger

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We are in Haiti, our 13K generator broke down. Someone lend us a generator and we plugged our inverter to it to charge our batteries. It didn't work and since, even when plugged to yet another generator we can't get the inverter to switch to charge and it emits sparks inside the inverter, any idea what went wrong?

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Hi, well you see this happened because the "Load" on the Inverter was more than it could handle. You see the Inverter senses the resistance of the batteries to determine how flat they are and how much current to put into the batteries, if anything else is connected to said batteries, that will simply muck up the sensing,and as has happened in your case destroyed the inverter.
I have serviced many inverters and the most likely failure that would emit sparks etc is failed output semiconductors.
One cannot really use an inverter to charge the batteries, like you did, UNLESS the batteries were completely isolated from the Generators wiring, and even then, your inverter, still may not have enough power to do this. As this is NOT what it was designed for.
Really an inverter is used to step up the Voltage from 12/24 Volts DC, batteries to 120/230 V AC.
Now again, one could use it, to then have a Battery Charger plugged into that, and use the output from the battery charger to charge some "Other" batteries, but that seems a bit roundabout.
Yes the Inverter will charge it's OWN batteries, BUT ONLY if that is the ONLY thing connected to the inverter.

Posted on Aug 20, 2010

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