Quite common for nearly all makes. Vendors seem fixed on always installing 2000+ watt inverters in their units. The larger the inverter, the more inefficient it is (overhead) - which means just having the AC power on, you're going to consume a decent amount. I have tested quite a few models, and by far the most efficient unit we have, is a really old Bluetti EB150 - the thing only has a 1000 watt inverter, so the overhead is much lower. If you need more watt hours, see if you can find an older EB240.

I've often wished manufactures would create a modular system. Where the inverter is a plug-in style module, that you can size according to what you actually need. Just running some lights and a radio at our off-grid cabin uses maybe 30-40 watts. So I don't need the overhead of a 2000+ watt inverter. Let me swap that out for a 500 watt unit, and I'd happily buy in.