spam disintegrator wrote:

I'm looking at replacing my current 80 gallon electric water heater.
The current heater says the upper and lower elements are both around
3300 watts.

Most 80 gallon units I have seen in stores nowadays are 5500 watt units
(upper and lower element are both 5500 watt).

I currently have a 5000 watt gasoline powered generator...

Which probably makes about 20 kW of "waste heat" :-)

Nick