IDK. I have a load bank, some 30kW.
I use Tempco strip heaters. 1400w ea, about 20 of them. This give a good load. They are about 50 ohm each too. I can test up to 240v.
You need like a 2ohm-2mOh load for a good high power load bank. The four you have would work in parralel for a low power stack of resistance bank. For a low power discharge, just make sure it can dissapate the energy ( waste heat, the 800w rating).