Update: I've now tested charger in Power Supply mode set to 12.8A, with battery disconnected from system. The charger isn't capable of delivering 30A before output voltage drops unacceptably low. For 23A load charger voltage is 11.41V.
I'm sure now the charger is faulty, however I'm unsure if it's safe to use on my battery.
I have recently purchased a range of new Victron equipment and reputable 100Ah lithium battery for a campervan 12V system upgrade. After testing I suspect the new IP22 30A charger may be faulty.
Attached are smart shunt trends showing Li-Ion profile Bulk charge from 20% SOC starts at 30A as expected, and then unexpectedly reduces to a~20A after ~10 minutes.
Once steady at 20A I introduced load to the system to test if charger output increased up to it's 30A rating, but it did not. The trend shows introduction of ~20A load followed by a ~5A load.
If I stop the charge briefly it re-commences at 30A for a short time then reduces again to ~20A
To eliminate external causes I have tested the charger connected directly to the battery and witness similar behavior
If I set charge rate to 15A max I see similar behavior, with charge starting at 15A then reducing to ~10A.
I have charged battery fully, discharged to 20% and repeated test charge with same results.
Does the behavior indicated and tests conducted confirm a fault with the charger?
Could the abnormal charging damage my battery, or other components in the sytem (500VA pheonix inverter, 500A smart shunt, 75|15 smartsolar ).