Remove Converter - Inverter Charger Install

[Ocsmb]

Hello smb community. Newbie with electrics.

1) Looking to replace converter charger with Kisae 2000w inverter Charger
2) I just want the inverter to power smb outlets from house battery when no shore power is present to power a 600w microwave, a HP all in one touchscreen. Also want the inverter Charger to smartly charge house battery and pass through power when on shore power.

Please see pics of current setup and what I’m about to do and let me know your thoughts. Thanks and cheers.

Inverter user guide
https://pdf.donrowe.com/ic121040_ic1...ners_guide.pdf

Inverter spec sheet

https://pdf.donrowe.com/ic121040_ic1...spec_sheet.pdf

[Ocsmb]

Here’s my current setup

[Ocsmb]

Also can I run cable from the existing house battery terminal that’s in this pic to the 300a anl fuse to my inverter or should I run a separate cable from the house battery post?