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It is ok at 28.2v if the battery doesn't accept more amps it is fully charged. You mentioned in a earlier post it was sitting at 29.2v that is default setting for equalize voltage go to pragram 33 and see if it is disabled needs to show    "eds" by default it should be disabled.

Hi I ended up also buying an Ecco  but the 5.5kw and it's working better than expected so far .
As I have assener 25.6v lithium 2 in  series I'm not using coms so also using user and the inverter is doing is switching to float after the set minutes for bulk time . 

29.2 is equalize volts and should not be necessary to set such volts for bulk . If you want long life out your cells it best not to bulk charge daily more than 3.45 per cel and float at 3.4v per cel . I normally only set equalize volts twice a month for a few hours so the bms can balance cells at high volts .
What is your value set in on 32  bulk charge time .Default is automatically bested to Start with 5 min and go from there 

If the battery BMS is a proper one it should stop accepting charge if there is a risk of overcharging.

You could try to do that 29.2v is 3.65v/cell max allowable voltage for lfp or set vloat to 28.2v and see if it comes down from 29.2v to 28.2v iaw set bulk and float to 28.2v