Diesel heaters and permanent or portable installation set up

I haven’t had luck getting mine to run with the Anker SOLIX F1200 (PowerHouse 757) 1229Wh | 1500W. Always would cut out on startup of the heater. I ended up going with a Dakota Lithium12v 23Ah Battery. I don’t plan to use it for any long trips and will not be hooking anything up except the heater.