I read thru the entire manual and it does not mention Supplements A nor B anywhere. Just plain old UL1741Hi Badbyte. congrats on getting the unit. Just curious if they go into the UL1741 cert in any more detail. Like is it SA or SB, etc.
According to a certificate I found for their HF series inverter it is listed as "UL1741:2010 Ed.2+R:16Sept2020"
I haven't found a certificate for the ASF nor ASP series yet.
A good description of -SA and -SB is here https://solarbuildermag.com/inverte...verview-ieee-1547-2018-and-ul-1741-explained/
Located towards bottom of article.