That all sounds VERY energy intensive...
Assuming 40 kWh per gallon of wvo/diesel, your running a 3.7 kW electric motor, a 3 Kw heater, etc etc, this is non trivial, and you haven't given numbers with a kill-a-watt meter so let's just assume you use 20 kWh of power to run the batch.
Assuming 30% conversion efficiency from fuel to electric that's 60 kWh, or 1.5 gallons of product, to process a 30-40 gallon batch, OK, you come out ahead, but you're still using up 5% of the product to process the product, which seems very energy intensive.
Now, a system that worked all day every day with no user intervention, just fill the top hopper and let gravity and sunlight do the work, that I can see working, a dripping tap will fill a bath quicker than you'd think and all that.
EROI basically.