Ours is a Samsung. 1.4kw input, 1000 watts output, at 120 volts AC.
I just went outside to the RV, meter in hand, and ran the exact same test. This time the meter said 144.6 amps coming out of the battery bank and going into the inverter.
That's 1850.88 watts at 12.8 volts
2017 Winnebago Forza 36G (Puff The Magic Wagon)
2004 Jeep Wrangler 4x4 (Golden Eagle)
YouTube Channel - Nomadic Native