the Bowman FH410-2986 is the obvious choice

This model has a thread size of 1 1/4" or 38 mm

so you can choose your inverter based on the power stated on the appliance

Emballagemål: Mål: 1 cm × 1 cm × 10 cm | Bruttovægt: 0

SeaTec, Septiktank 60l med 24v macerator 65x39x30cm BL338035 the Bowman FH410-2986 is theSeptic tank with a 60 liter capacity and a 24V macerator pump. It is designed for boat waste discharge and is equipped with various connection options and an inspection hatch. Contents: 60 l Weight: 8. 27 kg Volt: 24 V Product dimensions: 300 mm 390 mm 650 mm Package dimensions: Dimensions: 30 cm 65 cm 40 cm Gross weight: 8. 27 kg The tanks come with a mounted macerator pump and ball valve, so the tank can be shut off. Pumps have a 25 mm outlet.