I have an IP22 12|30(3) set as power supply. Running firmware 3.42. Serialnumber HQ2044Z29H8.
Using this to charge a LiFePo4 bank of 800+ Ah, using output 1. It is set for an output voltage of 13.90V while it only outputs 13,788V (measured at the IP22 terminals with Fluke 89 IV and confirmed by my BMS). The output current while measuring is < 1A.
I found that setting it to14V it really outputs 14V, while setting it back it gives an offset again. Offset is not linear!
As the LiFePo4 bank is sensitive to a correct output voltage this is really an issue.
Currently in a test-setup, but finally it will be two IP22' in parallel. Really afraid that sooner or later my bank will be destroyed due to an incorrect output voltage of the IP22' (or that the BMS is going to interfere of course).
Am I missing something or is there something wrong with the charger?
PS. Seems voltage is pretty accurate when there is some current floating (>2A) but drops with 100mV on the "loaded output" as soon as current drops. The "unloaded" outputs still output the correct voltage.
Kr,
Joep
