no, watts is voltage x amps.... watts do not exist without volume and flow....watts is watts, voltage is voltage and amps is amps, it's all simple math.
But quite right, I have no idea how long a 100amp Renogy battery might last as I boil a litre of water..... I might need a second battery.... I'm just saying I'm feeling confident it'll work for me.
I overland alone. I NEED a coffee in the morning so I NEED to grind some beans, boil some water and french press 16 ounces every morning. Plus I might want an egger on an induction hot plate. I think a 2000Watt Inverter is overkill but the 3000Watt version is $20 more..... same as my choice to buy 160Watts of solar or 320Watts of solar.... $200 vs $240.... simple math.