Charger/Converter questions...
I recently purchased a 2007 Fleetwood Gearbox, and have discovered this weekend that it has TWO charger/converters installed... one is a Magnetek 775 and the other is a PD9130. The PD9130 appears to b...
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You bench test for voltage at the converter output terminals with no battery attached. Then connect to a discharged battery to test for amps. (and to see if the converter can hold its voltage under load--but you need fat enough wires so there is not a lot of voltage drop--perhaps why you see only 11.8v?)
The battery will accept a certain maximum amps depending on its voltage and state of charge. To see 75 amps you will need a bank of about 225 AH at below 65% SOC approx., being charged at 14+ volts.
You can also see the 75 amps from the converter if you also have a draw on the battery of over 75 amps, such as an inverter running a kettle. The battery voltage will be pulled down under load so it offers little resistance to the charger, so now it can do its 75 amps at its 13.x voltage.
The battery will accept a certain maximum amps depending on its voltage and state of charge. To see 75 amps you will need a bank of about 225 AH at below 65% SOC approx., being charged at 14+ volts.
You can also see the 75 amps from the converter if you also have a draw on the battery of over 75 amps, such as an inverter running a kettle. The battery voltage will be pulled down under load so it offers little resistance to the charger, so now it can do its 75 amps at its 13.x voltage.
