When connecting two IP Blue chargers (30A each) in parallel in power supply mode, the maximum total output is 32A. When connected individually, each charger provides a steady 30A. Do these units sense the output voltage and maintain around 30A? If I put a 40A diode on each IP Blue unit, would that solve the problem?
How can I force them to produce at least 50amp ?
The units sense the output voltage and control the current to maintain the desired voltage, they do not just generate 30A each regardless. Are you putting a load greater than 32A on the pair so the voltage drops and causes them to deliver a higher current.
I am trying to charge LiFePO4 batteries. When selecting the LiFePO4 profile on the Blue IP maximum, I am getting 27 amps total, versus selecting power mode which gives a maximum of 32 amps. How can I force these chargers to provide more amps? Thank you
What voltage are they reading when charging, what voltage are they set to charge and do you know the battery voltage or SOC without charge going in. If the batteries are small or close to full then the chargers will restrict the output current to stop the batteries getting too high a voltage. With 60A of available current, if you have an empty 100Ah lithium battery at say 13.0V you will get 60A charge current to start with but as the charge voltage reaches 14.2V the charge current will be throttled back progressively until the batteries are full and only taking in around 4A.
Thank you, I run a test and I am even more confused about why these chargers connected in parallel won’t provide me with more than 30 amps. When I tried to add a load, e.g. 45 amps, a negative charging figure of -15 amps appeared on the shunt monitor. Regardless if the chargers run on power supply mod or on lifepo4 charging profile.
I see your points. I have tried a variety of options, but nothing works at all. For example, one of the options I tried was disconnecting the batteries and running both chargers on a power supply. I put a load of 45 amps on them, and they just dropped off; they couldn’t handle it. I think there is something in them that is purposefully preventing them from providing a combined output of 60 amps. I am looking for some sort of trick so that they can’t sense each other’s amps or voltage.