Horsefly
Solar Wizard
Ehhh. I dunno. I think class-t fuses are usually pretty fast, but the inrush we are talking about is a small fraction of a second. I'm not convinced it would blow a fuse, but I guess it is a possibility. What I remember is that a *REALLY* fast fuse might blow if a 2X current lasted for more than 0.1 seconds. I believe that the times we are talking about for these front-end capacitors would be less than 0.1 seconds. However, I haven't done the analysis.That kind of inrush might not harm the inverter, but it might blow fuses. class-t fuses @ $40 a piece make a $20 precharge circuit worth it.
I'd reword your sentence. If you are putting in a new battery system, adding a pre-charge is EASY enough to make it worth it.