watts= volts x amps

you want to run a blender thru an inverter
the blender draws 4.0 amps (info on blender dataplate)
it is a 120vac blender (off your kitchen counter)
it will take 480 watts of power use it (120 x 4.0)
that is ....once it's up and running
surge wattage may be 6.0 - 8.0 amps

as it's running you throw a frog in there
will "bog down" and draw a bit more before it levels out

when buying inverters go big

2 batteries at 6volts in series will be a better 12v source than 1 at 12v

most of these terms are general

good luck, have fun
-ao

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