I'm using AGM with Sunny Island, have no precharge.
Other forum members with DIY lithium and relay have welded their relays.
Wonder how this is addressed with supported lithium batteries?
BYD B-Box is one. Only found a single web page, a data sheet, on their site and no mention of precharge.
This 10kW, $20k (delivered) model also says SMA compatible:
The 10.24kWh BYD B-Box (Battery Box) HV Battery Storage is a high voltage, lithium battery with a battery control unit (BCU). Designed with the safe lithium iron phosphate (LiFePO4) battery chemistry, the B-Box is the ideal battery storage solution for residential and commercial applications...
sunwatts.com
I find some old manuals. No mention of "precharge" or "inrush"
"High-voltage" batteries with low-voltage battery and boost converter are inherently current limited.
Directly used low-voltage batteries could have precharge resistor, or FET BMS with ramp-up function.
I expect to read about these things in specs. But for supported pairings, may only be dealt with between manufacturers and not disclosed to customers.